---
title: "Prusa Pro HT90 review: Can a Prusa 3D printer print PEEK?"
url: https://www.voxelmatters.com/can-a-prusa-3d-printer-print-peek/
date: 2025-03-11
modified: 2025-05-07
lang: en
author: "Davide Sher"
description: "The new Prusa Pro HT90 represents Prusa Research's first venture into engineering materials. While Prusa has been battling multiple competitors in the consumer and prosumer desktop 3D printer segment (mainly..."
categories:
  - "3D Printer Hardware"
  - "Decision Makers"
  - "VoxelMatters Reviews"
tags:
  - "Featured"
image: https://www.voxelmatters.com/wp-content/uploads/2025/03/Prusa-Pro-HT90-review-1-640x468.jpg
word_count: 4592
---

# Prusa Pro HT90 review: Can a Prusa 3D printer print PEEK?

The new [Prusa Pro HT90](https://www.prusa3d.com/it/prodotto/prusa-pro-ht90-eu-230v-2/?utm_source=google&utm_medium=cpc&utm_campaign=IT-IT_Search_Text_Brand&utm_id=873171022&gad_source=1&gclid=Cj0KCQiA2oW-BhC2ARIsADSIAWo91Np8XiHMiut90zO54FRsgSPMxQkZQsFAfoX9C5vDvM2tJxABvwkaAl3iEALw_wcB) represents [Prusa Research](https://www.voxelmatters.directory/company/prusa-research/)'s first venture into engineering materials. While Prusa has been battling multiple competitors in the consumer and prosumer desktop 3D printer segment (mainly from the Far East, after having defeated most competitors in the West), this machine represents a significant departure from the company's core business. This change in strategy allowed VoxelMatters to connect more closely with Prusa's business development teams, which (correctly) identified VoxelMatters' audience as AM professionals across multiple AM-adopting industries.

[We first saw the Prusa Pro HT90 at work during a press event at Prusa's HQ in Prague](https://www.voxelmatters.com/prusa-steps-into-engineering-materials-with-new-pro-ht90-3d-printer/). At a glance, we were impressed by it on several levels (quiet operation, elegant design, quality of parts) but still a bit skeptical that the company would be able to smoothly transition from a community-driven maker of desktop systems priced below $5,000 to a manufacturer of professional and entry-level industrial systems costing over $10,000 (nearly $15,000 for the complete high-temperature package). Prusa sent us a machine to test extensively and better understand the system's capabilities. We set out to answer one question above all: can a Prusa 3D printer print demanding high-performance materials like PEEK? And if so, how does this reflect on other materials?

![](https://www.voxelmatters.com/wp-content/uploads/2025/02/Prusa_HT90_03.jpg)Joseph Prusa presenting the HT90 in Prague.

Before our review, remember that the Prusa Pro HT90 is a high-end delta kinematics printer with active vibration cancellation, a controlled printing environment, and acceleration up to 20,000 mm/s². This means it can deposit up to 1 kg of PETG or ABS filament in 8 hours. If you want to take it slower (which is regulated through the slicer settings), it can achieve extremely high surface quality.

Getting all the rest of the specs out of the way, here they are:

| **Nozzle** | 300 °C (high-flow) / 500 °C (high-temp); Quick-swappable |
| ---------- | ---------------------------------------------------------- |
| **Heatbed** | 155 °C; Removable magnetic PEI sheet |
| **Print volume** | Ø 300 mm (X, Y) × 400 mm (Z), 28 liters |
| **Chamber** | Active heating up to 90 °C; High-pressure turbine cooling; Closed-loop HEPA filter (no exhaust); Insulated print chamber with separate electronics |
| **Extruder** | Direct drive; Optimized for FLEX |
| **Additional features** | Integrated monitoring camera (easily removable); stop button; High-powered 48V motors; Full offline mode; Best-in-class PrusaSlicer |

I've been using the Prusa Pro HT90 for over three months and can provide a detailed account of its potential. Is it worth the cost? Yes. Does it have market potential? Possibly. Is it a perfect deal? Some things are great, and some things can be improved. This was the first time I used a Prusa 3D printer (and accessed Prusa's digital online network) and the first time I tested an industrial-level 3D printer working with engineering materials. I can say that all in all, it was a fantastic experience.

## Delivery and unpacking

During the launch event, Joseph Prusa explained that the HT90's main target is additive manufacturing professionals who already own a desktop Prusa 3D printer and need a machine that enables them to work on prototypes using the same functional, high-performance plastics they use in their final products. So, it is intended primarily as an advanced prototyping system that can produce end-use parts with almost every engineering filament.

[![](https://www.voxelmatters.com/wp-content/uploads/2025/02/Prusa_Pro_HT90_unboxing_IMG_4694-480x640.jpg)](https://www.voxelmatters.com/wp-content/uploads/2025/02/Prusa_Pro_HT90_unboxing_IMG_4694-rotated.jpg)

[![](https://www.voxelmatters.com/wp-content/uploads/2025/02/Prusa_Pro_HT90_unboxing_IMG_4696-480x640.jpg)](https://www.voxelmatters.com/wp-content/uploads/2025/02/Prusa_Pro_HT90_unboxing_IMG_4696-rotated.jpg)

[![](https://www.voxelmatters.com/wp-content/uploads/2025/02/Prusa_Pro_HT90_unboxing_IMG_4699-480x640.jpg)](https://www.voxelmatters.com/wp-content/uploads/2025/02/Prusa_Pro_HT90_unboxing_IMG_4699-rotated.jpg)

[![](https://www.voxelmatters.com/wp-content/uploads/2025/02/Prusa_Pro_HT90_unboxing_IMG_4701-480x640.jpg)](https://www.voxelmatters.com/wp-content/uploads/2025/02/Prusa_Pro_HT90_unboxing_IMG_4701-rotated.jpg)

This type of user needs two things: that the 3D printing system is easy to use and that it is easy to set up. This makes me an excellent "test subject". While I am generally familiar with desktop 3D printers, I don't have in-depth experience with 3D printing (at least not to the point that a 3D printing professional or engineer would). I usually keep all the slicer settings on preset levels and may change speed, layer height and infill levels or shape. At the same time, a "Pro" user can go to great lengths to regulate the printing process (retractions, wall size, support settings, in-depth infill settings, etc.) to achieve much better results. In addition, I have no previous experience with Prusa 3D printers. Which means that if I can figure it out, anyone can. And I say this because receiving an industrial-grade 3D printer (and oven, yes, did I forget to mention it? You will need a professional oven to dry up the high performance filaments) can be overwhelming at first.

But let's go in order: I received two large pallets at my home address. I have access to a laboratory for reviewing products, but I wanted to work on it regularly for a few months, so I decided to set it up in my home office. For more extended use, I don't think this is intended as a home or office product. Even though it does feature a closed-loop air recirculation system with a HEPA filter, keeping the chamber free of ultra-fine particles, if you need to print engineering plastics regularly, it should be set up in a shop or garage with proper ventilation and enough space for the professional filament dryer oven.

[![](https://www.voxelmatters.com/wp-content/uploads/2025/02/Prusa_Pro_HT90_unboxing_IMG_4709-480x640.jpg)](https://www.voxelmatters.com/wp-content/uploads/2025/02/Prusa_Pro_HT90_unboxing_IMG_4709-rotated.jpg)

Prusament supplies

[![](https://www.voxelmatters.com/wp-content/uploads/2025/02/Prusa_Pro_HT90_unboxing_IMG_4708-480x640.jpg)](https://www.voxelmatters.com/wp-content/uploads/2025/02/Prusa_Pro_HT90_unboxing_IMG_4708-rotated.jpg)

The Dry Box

[![](https://www.voxelmatters.com/wp-content/uploads/2025/02/Prusa_Pro_HT90_unboxing_IMG_4712-480x640.jpg)](https://www.voxelmatters.com/wp-content/uploads/2025/02/Prusa_Pro_HT90_unboxing_IMG_4712-rotated.jpg)

A sample PC part

[![](https://www.voxelmatters.com/wp-content/uploads/2025/02/Prusa_Pro_HT90_unboxing_IMG_5376-480x640.jpg)](https://www.voxelmatters.com/wp-content/uploads/2025/02/Prusa_Pro_HT90_unboxing_IMG_5376-rotated.jpg)

The sample ASA part from Prusa

The first challenge was getting the 3D printed and the filament dryer oven to the second floor since the boxes did not fit in the elevator. So, most of the unpacking was done in the lobby. It can feel a bit overwhelming at first. I opened the boxes and pushed both systems into the elevator, house, and office. Here, I opened up the internal boxes to understand precisely what the complete HT90 package from Prusa included.

#### And here it is:

- 1 Prusa HT90 3D printer: €11,490
- 1 (Additional) Prusa Pro HT90 High-Temperature Head: €1,124
- 2 Extra nozzles of which

1 Revo High Flow nozzle: €47,90
- 1 Revo ObXidian nozzle: €71,90

- 6 spools of filament of which:

Prusament ASA Jet Black 850g: 29,99
- Prusament ASA Sapphire Blue 850g: €29,99
- Prusament PC Blend Prusa Pro Green 970g: €49,99
- Prusament PEI 1010 Natural 500g: €149
- Prusament PA11 Carbon Fiber Black 800g: €99,99
- 3DXTech CarbonX PEEK+CF10 Black 500g: €399
- Fiberology FiberFlex 850g: €40

- 1 Prusa Pro Filament Drybox: €239
- 1 Memmert UF55 Filament Dryer: €2,245
- 1 Magigoo Pro HT 50 ml: €48,90

I had never received such a large package of products to test, and I felt the responsibility. So, over the following three months, I tested these products. Once you get the boxes out of the pellets, you notice that everything is packed neatly and orderly. Getting everything out of the box was easy. First, the printer, then the box containing the filament spools and a selection of demonstrative parts, then the box containing the Dry Box and finally a box containing various accessories such as the extra printhead, the extra nozzles and the Magigoo for the hard-to-stick high-temperature materials.

[![](https://www.voxelmatters.com/wp-content/uploads/2025/02/Prusa_Pro_HT90_unboxing_IMG_4723-640x480.jpg)](https://www.voxelmatters.com/wp-content/uploads/2025/02/Prusa_Pro_HT90_unboxing_IMG_4723.jpg)

The 3D printed spool holder

[![](https://www.voxelmatters.com/wp-content/uploads/2025/02/Prusa_Pro_HT90_unboxing_IMG_5391-640x480.jpg)](https://www.voxelmatters.com/wp-content/uploads/2025/02/Prusa_Pro_HT90_unboxing_IMG_5391.jpg)

The door handle, printed in PC

[![](https://www.voxelmatters.com/wp-content/uploads/2025/02/Prusa_Pro_HT90_unboxing_IMG_5392-640x480.jpg)](https://www.voxelmatters.com/wp-content/uploads/2025/02/Prusa_Pro_HT90_unboxing_IMG_5392.jpg)

The HEPA filter holder, also printed.

Another thing you immediately notice is how many of the 3D printer parts are 3D printed. Prusa has one of the largest 3D printing farms in the world and uses it. The door handle is polycarbonate (and it looks excellent), while the screw-on spool holders (including the one inside the Dry Box) are also printed in ASA. The large HEPA filter holder and the entire printhead are also printed in ASA as well as several smaller parts. Other components (such as the door blockers) are also printed in TPU.

After removing all the protective styrofoam from the printer (the printhead was already attached), I hooked it up to the current and switched it on.

## Turning the printer on and connecting it

The initial setup can be done via the large 7’’ touchscreen. It is no more complicated than setting up a mobile. Once you finish the automatic calibration, all you have to do is load a filament and start printing. However, to fully enjoy the experience, you should connect the printer to the internet and via your Wi-Fi network. I was surprised that an adapter (supplied with the printer) is required to connect to the wi-fi. It doesn't change anything, but I expected it to be integrated. There is a reason for this. While the HT90 offers a comprehensive remote print management system and surveillance, the printer is fully prepared for a completely offline operation for complete security. That's why the Wi-Fi module can be disconnected from the printer.

[![](https://www.voxelmatters.com/wp-content/uploads/2025/02/Prusa_Pro_HT90_unboxing_IMG_4731-480x640.jpg)](https://www.voxelmatters.com/wp-content/uploads/2025/02/Prusa_Pro_HT90_unboxing_IMG_4731-rotated.jpg)

The WI-Fi adapter, supplied

[![](https://www.voxelmatters.com/wp-content/uploads/2025/02/Prusa_Pro_HT90_unboxing_IMG_4735-480x640.jpg)](https://www.voxelmatters.com/wp-content/uploads/2025/02/Prusa_Pro_HT90_unboxing_IMG_4735-rotated.jpg)

Setup is quick

[![](https://www.voxelmatters.com/wp-content/uploads/2025/02/Prusa_Pro_HT90_unboxing_IMG_4734-480x640.jpg)](https://www.voxelmatters.com/wp-content/uploads/2025/02/Prusa_Pro_HT90_unboxing_IMG_4734-rotated.jpg)

All done through the touch screen

[![](https://www.voxelmatters.com/wp-content/uploads/2025/02/Prusa_Pro_HT90_unboxing_IMG_4733-480x640.jpg)](https://www.voxelmatters.com/wp-content/uploads/2025/02/Prusa_Pro_HT90_unboxing_IMG_4733-rotated.jpg)

### Prusa Connect

If you don't have security concerns and want the whole experience, you should connect the printer to Prusa Connect. Although I did experience some minor difficulties at times (mainly due to my lack of knowledge but also that the HT90 is still in beta and not integrated into the slicer), the system works well overall. It provides a smooth digital printing experience suitable to 3D printer users of any level. The HT90 is a relatively new addition and is still considered in beta testing.

In addition, the Prusa Slicer requires some experience with it and 3D printing in general. But it's not strictly necessary. The newest settings from Prusa Connect let users print parts directly from the Printables 3D model network or limit user options to the basics, even when working with high-performance materials. In addition, Prusa just released the EasyPrint option, which lets users modify the files directly from Printables.

![Read our review of the Prusa Pro HT90, Prusa Research](https://www.voxelmatters.com/wp-content/uploads/2025/02/Prusa-Connect.jpg)This is the Prusa Connect main page for my account. It shows your printer, the latest jobs, and a shot of the printed object.

The procedure requires establishing the PrusaLink and can be done entirely from the printer's touchscreen. Just click on "Configure Prusa Connect," and the screen will show a QR code that can be scanned with a cell phone and a code that can be manually entered into a computer browser. Once the printer is added to Prusa Connect, a screen will confirm the addition. The code can also be entered manually.

#### Finding and loading the Prusa Printer Settings

When slicing a project for the Prusa Pro HT90, the PrusaSlicer needs a specific profile that is not pre-installed in the program's first download. These profiles are only available if you have purchased the printer. After receiving the printer, your PrusaAccount will be associated with the HT90. The Prusa Account can be used directly in the PrusaSlicer to download the profiles, or you can download them from the Help page.

![Read our review of the Prusa Pro HT90, Prusa Research](https://www.voxelmatters.com/wp-content/uploads/2025/02/and-load-it-IN-THE-PRINTER-scaled.jpg)

This did not immediately work, but there are many other options, including downloading them from the printer or the web interface. I downloaded them from the printer to a USB drive (connected to a different port than the Wi-Fi adapter). The procedure is easy, and once that was out of the way, I was ready to print.

Prusa prides itself on the HT90's guarantee of an always-perfect first layer. I can confirm (unless you use hygroscopic materials that have not been adequately dried, but we'll get to that later). One reason for this is its magnetic plate. Placing it on the platform and feeling the magnet grab a firm hold of it is very satisfying.

## Prusa Pro HT90 and review: printing standard materials

The [Filament](https://www.prusa3d.com/it/prodotto/prusa-pro-filament-drybox/) [Dry Box is a cool product](https://www.prusa3d.com/it/prodotto/prusa-pro-filament-drybox/). It's meant for the more moisture-sensitive materials, but valuable for any filament. it's well-built and rugged. It has a spinning 3D printed spool holder inside, a digital thermometer and allows direct printing through a PTFE filament tube. It also features a system for maintaining and reducing humidity using silica gel. This material actively absorbs moisture from the environment inside the box, helping to keep the filament dry.

![Read our review of the Prusa Pro HT90, Prusa Research](https://www.voxelmatters.com/wp-content/uploads/2025/02/filaments-scaled.jpg)

Prusa provides a manual with clear instructions on how to use each different material, and for most of them, it suggests using the dry box to get the best results. Also, the Prusa Slicer already integrates information for 30 different filament products, including 9 different Prusament materials and materials from 3DXTech (for engineering materials and composites), Fiberology (Fiberflex), Filamentum (ABS) and Colorfabb (PLA).

The first material I decided to use was the most basic one that Prusa sent: ASA. As I had never used a Prusa printer before, I also never used Prusament materials. Still, I now understand why Prusa is one of the biggest companies in filament sales (according to the latest VoxelMatters Polymer AM report) and the Prusa management was so proud to show us their filament manufacturing facility during the visit to Prague HQ. The quality is in every detail. It's perfectly wound as a show, has a solid spool and comes in a thick vacuum plastic cover. This is not uncommon, but the whole package shows that it's a qualitative product.

![Read our review of the Prusa Pro HT90, Prusa Research](https://www.voxelmatters.com/wp-content/uploads/2025/02/Prusa_HT90_36-2.jpg-e1740752673736.avif)Prusament filaments at Prusa's manufacturing facility in Prague.

#### ASA and PC

Loading the filament is easy; push it down to the extruder and hit "Load". The filament purges and asks you if you want to purge more. And finally (but it really didn't take that long at all), we get to do some printing. After getting the Benchy out of the way, with impressive speed and quality, I discovered that the new Backflip app was released just as I began testing the Prusa HT90. Co-founded by AM industry veterans, [Backflip](https://www.voxelmatters.directory/company/backflip/) uses AI to allow users to create models from 2D images easily. For the first model, I designed an intricate vase. This enabled me to test the system's precision and ability to overcome hurdles on files not yet validated for printing and may contain some errors.

![](https://www.voxelmatters.com/wp-content/uploads/2025/02/Prusa_Pro_HT90_Review_IMG_4776.jpg)One of the very first parts I printed using ASA, an intricate original vase I designed using the Backflip AI app.

I uploaded the STL to the Prusa Slicer and selected the material from the list of presets. The system gives you several different filament options based on your installed extruder and printhead. Then, based on the selected material, you can also choose presets for speed, precision, balance, and more. Because I set up the HT90 with the Prusa Link, the machine is immediately visible within the slicer, so all I had to do was send the Gcode to the selected printer (or export it to the desktop and load it manually). The online system is beyond intuitive and very well designed.

[![](https://www.voxelmatters.com/wp-content/uploads/2025/02/PRUSA-REVIEW-copia-480x640.jpg)](https://www.voxelmatters.com/wp-content/uploads/2025/02/PRUSA-REVIEW-copia-rotated.jpg)

Another part from Backflip

[![](https://www.voxelmatters.com/wp-content/uploads/2025/02/Prusa_Pro_HT90_unboxing_IMG_5376-480x640.jpg)](https://www.voxelmatters.com/wp-content/uploads/2025/02/Prusa_Pro_HT90_unboxing_IMG_5376-rotated.jpg)

The sample ASA part from Prusa

I printed the vase at the highest speed and it was ready in just over one hour. I used no supports for the vase's intricate details (even though the slicer recommended using them) and it still came out with no errors or issues and an excellent surface quality. I then proceeded to print another object from Backflip: a small customized steampunk dragon holding a gift box, to keep in line with the Christmas spirit. It was a relatively simple model in terms of supports but a high level of details and gave no issues. I printed many other objects, including several using the Jet Black ASA Prusament (more on this further down). Still, the cut-off jet engine nozzle model that Prusa sent as a sample part can provide a better idea of what the HT90 can do when taken to the limit regarding size and complexity. Judging by my own experience with it, I do not doubt that with the highest precision setting, anyone can print a part like that on this machine.

[![](https://www.voxelmatters.com/wp-content/uploads/2025/02/Prusa_Pro_HT90_Review_IMG_5396-640x480.jpg)](https://www.voxelmatters.com/wp-content/uploads/2025/02/Prusa_Pro_HT90_Review_IMG_5396.jpg)

It was Christmas time so I printed some hot wheels tracks to give away

[![](https://www.voxelmatters.com/wp-content/uploads/2025/02/Prusa_Pro_HT90_Review_IMG_5397-640x480.jpg)](https://www.voxelmatters.com/wp-content/uploads/2025/02/Prusa_Pro_HT90_Review_IMG_5397.jpg)

PC was ideal for this application

[![](https://www.voxelmatters.com/wp-content/uploads/2025/02/Prusa_Pro_HT90_Review_IMG_5398-640x480.jpg)](https://www.voxelmatters.com/wp-content/uploads/2025/02/Prusa_Pro_HT90_Review_IMG_5398.jpg)

Excellent definition.

[![](https://www.voxelmatters.com/wp-content/uploads/2025/02/Prusa_Pro_HT90_Review_IMG_5399-640x480.jpg)](https://www.voxelmatters.com/wp-content/uploads/2025/02/Prusa_Pro_HT90_Review_IMG_5399.jpg)

And great details.

[![](https://www.voxelmatters.com/wp-content/uploads/2025/02/Prusa_Pro_HT90_Review_IMG_5400-640x480.jpg)](https://www.voxelmatters.com/wp-content/uploads/2025/02/Prusa_Pro_HT90_Review_IMG_5400.jpg)

I also used ABS and ASA.

Next up I tried a more challenging - and very useful - material that I had never printed before: polycarbonate. The Prusament PC comes in a lovely aqua green color. Just unload the ASA material and load the PC, select it from the various options on the touchscreen, and you are ready to go. Since we were still in a pre-Christmas period, I figured I'd print a bunch of HotWheels track parts and connectors ([Jump and Landing](https://www.thingiverse.com/thing:4829356), [Track Connectors](https://www.thingiverse.com/thing:4049413) from Thingiverse, [90° Curve](https://www.printables.com/model/173203-hot-wheels-90-degree-curve-with-legs) and [Launcher](https://www.printables.com/model/451106-hot-wheels-launcher-remix-fits-standard-hot-wheels) from Printables), this would give me a good idea of dimensional precision and durability on connecting and locking items. As well as some additional gifts to hand out. I never thought it would be so easy to print PC, making it one of my favorite materials. It's durable, and the HT90 prints with the highest precision and dimensional stability, with no warping at all. Even the external handle of the HT90, which has an in-built locking mechanism, is printed with it.

#### Printing Flex

The last of the neat "low-temperature" materials I tested (before changing the nozzle for carbon fiber composites) was the Fiberflex 40D from Fiberology. In this case, I wanted to print a large part to make sure it would print without issues, and one of the Christmas presents I received—a DJI Neo drone—gave me the perfect solution. I downloaded a custom box with dedicated compartments for the drone ([DJI Neo Rugged Box](https://makerworld.com/en/models/640896-dji-neo-rugged-box#profileId-566829) from MakerWorld), the controller, and other accessories.

[![](https://www.voxelmatters.com/wp-content/uploads/2025/02/Prusa_Pro_HT90_Review_IMG_5141-480x640.jpg)](https://www.voxelmatters.com/wp-content/uploads/2025/02/Prusa_Pro_HT90_Review_IMG_5141-rotated.jpg)

Another perfect first layer

[![](https://www.voxelmatters.com/wp-content/uploads/2025/02/Prusa_Pro_HT90_Review_IMG_5144-480x640.jpg)](https://www.voxelmatters.com/wp-content/uploads/2025/02/Prusa_Pro_HT90_Review_IMG_5144-rotated.jpg)

The box came out with no defects

[![](https://www.voxelmatters.com/wp-content/uploads/2025/02/Prusa_Pro_HT90_Review_IMG_5148-480x640.jpg)](https://www.voxelmatters.com/wp-content/uploads/2025/02/Prusa_Pro_HT90_Review_IMG_5148-rotated.jpg)

The internal part was printed in a flex material

[![](https://www.voxelmatters.com/wp-content/uploads/2025/02/Prusa_Pro_HT90_Review_IMG_5146-480x640.jpg)](https://www.voxelmatters.com/wp-content/uploads/2025/02/Prusa_Pro_HT90_Review_IMG_5146-rotated.jpg)

Great first layer with flex also

[![](https://www.voxelmatters.com/wp-content/uploads/2025/02/Prusa_Pro_HT90_Review_IMG_5153-480x640.jpg)](https://www.voxelmatters.com/wp-content/uploads/2025/02/Prusa_Pro_HT90_Review_IMG_5153-rotated.jpg)

Check out that infill

[![](https://www.voxelmatters.com/wp-content/uploads/2025/02/Prusa_Pro_HT90_Review_IMG_5158-480x640.jpg)](https://www.voxelmatters.com/wp-content/uploads/2025/02/Prusa_Pro_HT90_Review_IMG_5158-rotated.jpg)

The final result.

[![](https://www.voxelmatters.com/wp-content/uploads/2025/02/Prusa_Pro_HT90_Review_IMG_5160-480x640.jpg)](https://www.voxelmatters.com/wp-content/uploads/2025/02/Prusa_Pro_HT90_Review_IMG_5160-rotated.jpg)

Great surface quality

[![](https://www.voxelmatters.com/wp-content/uploads/2025/02/Prusa_Pro_HT90_Review_IMG_5159-480x640.jpg)](https://www.voxelmatters.com/wp-content/uploads/2025/02/Prusa_Pro_HT90_Review_IMG_5159-rotated.jpg)

The box consisted of rigid parts (the box itself, the lid, and the clips to lock it) and an internal padding. The instructions said to print the internal padding with a low infill, but I figured it would be even better to print it with a flexible material and a low infill. So I did just that and it turned out great. It fit perfectly inside the ASA box (which also turned out great with smooth external finish even at a high speed setting). It has given me no issue since I have used it quite often.

#### Composites (PA-CF)

Next, it was time to test the [Revo ObXidian nozzle](https://www.prusa3d.com/it/prodotto/revo-obxidian-nozzle-0-4mm/) with some composites. I changed the nozzle: unscrewed the one in place and screwed on the new one. Prusa provided the Prusament PA11 Carbon Fiber Black to work with, and I had to use the filament dryer for the first time. I learned that the hard way, since I tried printing it without drying it first and the part came right off the plate shortly after the print started. Because nylon "only" requires drying at 90° for 4 hours, I didn't have to unpack the Memmert beast yet. I could just use the smaller FilaDryer E2 Filament Dryer SUNLU had just sent us to try out, which goes up to 110°C. Besides being very easy to use, the nice part about the FilaDryer E2 is that you can print directly from it.

[![](https://www.voxelmatters.com/wp-content/uploads/2025/03/Prusa_Pro_HT90_review_IMG_5408-640x480.jpg)](https://www.voxelmatters.com/wp-content/uploads/2025/03/Prusa_Pro_HT90_review_IMG_5408.jpg)

[![](https://www.voxelmatters.com/wp-content/uploads/2025/03/Prusa_Pro_HT90_review_IMG_5410-640x480.jpg)](https://www.voxelmatters.com/wp-content/uploads/2025/03/Prusa_Pro_HT90_review_IMG_5410.jpg)

[![](https://www.voxelmatters.com/wp-content/uploads/2025/03/Prusa_Pro_HT90_review_IMG_5411-640x480.jpg)](https://www.voxelmatters.com/wp-content/uploads/2025/03/Prusa_Pro_HT90_review_IMG_5411.jpg)

For this material I decided to test a part that would have to withstand some heat. Since the handle of my *bistecchiera* (Italian for a grilling pan to use on the stove) had just broken off, I found one similar enough via [Shapeways' owned Thangs](https://www.voxelmatters.directory/company/thangs/) and downloaded it ([Pan/Pot Handle](https://www.thingiverse.com/thing:3651142) from Thingiverse). The handle came out beautifully, with some lovely shades created by the layers on its upper surface. It took some adjusting to hook it up to the grilling pan since it cannot come in direct contact with it and needs to fit inside a metal adapter that separates it from the pan itself. In the end, though, I have to say I am very happy with the result. I didn't do much more printing with PA11 CF since I was too eager to test the high-temperature materials and finally answer the question that titles this review (I must admit that eventually the heat got to it and it melted so I had to replace it with a PEEK CF one).

## Prusa Pro HT90 and review: high-temp material and composites

The first thing to do when working with high-temperature filaments is change the printhead. This scared me because I am not very good at mechanical stuff. The Prusa team sent me a link to the instructions from the Prusa users blog, and it turned out to be a lot easier than I had imagined. You unload the filament, undo the screw that holds the electronic connector in place, detach the magnetic arms holding the printhead and detach the PTFE tube. Then repeat the steps backwards to install the new printhead. It takes no more than a minute once you get the hang of it. The machine immediately recognizes that you mounted a new printer and asks you to update the specs directly on the touchscreen.

The only relatively minor issue I encountered and could not solve is that the slicer did not recognize the printer with the High Temperature profile, so when I tried to send a file to Prusa Connect via the PrusaLink, it said there were no printers available. The printer was still visible on Prusa Connect but I could not send a file to it directly. I had to export the file to the desktop and then drag and drop it to upload to the printer on the Prusa Connect window. It's not a big deal, but I'm still trying to figure out what I'm doing wrong.

[![](https://www.voxelmatters.com/wp-content/uploads/2025/03/Prusa_Pro_HT90_review_IMG_5095-640x480.jpg)](https://www.voxelmatters.com/wp-content/uploads/2025/03/Prusa_Pro_HT90_review_IMG_5095.jpg)

The filament dries is easy to set up.

[![](https://www.voxelmatters.com/wp-content/uploads/2025/03/Prusa_Pro_HT90_review_IMG_5097-640x480.jpg)](https://www.voxelmatters.com/wp-content/uploads/2025/03/Prusa_Pro_HT90_review_IMG_5097-rotated.jpg)

Look at the extruder temperature go up

Next, it was time to unpack and use the massive [Memmert filament dryer.](https://www.prusa3d.com/it/prodotto/memmert-uf55-filament-dryer/) A beast of an oven which can heat filaments to 300° (PEEK and PEI require about 130° for 4 hours) and hold several spools within its 53-liter chamber. Most high-performance materials are highly hygroscopic, meaning that they literally gobble up moisture from the environment. During the print, the water evaporates, creating thousands of micro bubbles and severely degrading their performance, even to the point of rendering them completely impossible to print. Once the filament is appropriately dry, place it immediately into the Prusa Pro Filament Drybox to prevent repeated moisture build-up. Setting up the oven is easy; turn it on, select the temperature and set the timer.

#### PEI (ULTEM)

PEI (ULTEM) turned out to be by far the most challenging material to print, and, to be entirely honest, I had limited success with it. I managed to print some decent-quality parts, but it took some getting used to. I do not doubt that with some experience, I could be able to print larger parts, such as the 20 cm tall gearbox mechanical component one that Prusa sent me as a sample, but I encountered challenges on smaller parts, even smaller parts.

The material I tested was unfilled Prusament PEI (ULTEM) 1010 because. I thought it would be easier than the PEEK composite (that I tried next), but boy was I wrong. First, there are inherent limitations: Prusa specifics that this high-cost material is very prone to warping and is also highly hygroscopic, absorbing moisture from the air within 10 minutes. This is an understatement. PEI soaks up moisture and the bubbles that evaporate during the print are apparent. The material needs to be dried in the oven at 130°C for at least four hours, however, leaving it longer is better.

[![](https://www.voxelmatters.com/wp-content/uploads/2025/03/Prusa_Pro_HT90_review_IMG_5383-640x480.jpg)](https://www.voxelmatters.com/wp-content/uploads/2025/03/Prusa_Pro_HT90_review_IMG_5383.jpg)

These parts came out fairly accurate but the material soaked up too much moisture and came out opaque and very rough

[![](https://www.voxelmatters.com/wp-content/uploads/2025/03/Prusa_Pro_HT90_review_IMG_5188-640x480.jpg)](https://www.voxelmatters.com/wp-content/uploads/2025/03/Prusa_Pro_HT90_review_IMG_5188.jpg)

The clamp I printed using PEI came out warped and usuable even though the material had been dried.

The first time I used it, I put the material through the full four hour cycle in the filament dryer but waited too long before printing, and the result was terrible. The parts I printed—two different types of iPhone and Apple Watch charger ports—came out opaque (a consequence of the moisture and bubbles). Low-cost materials like PLA or ASA are a much better choice for these parts but it was just meant as a test. The one with a round base was geometrically accurate; however, the one with a square base was also warped and dimensionally deformed.

A friend, a polymer material scientist at Syensqo, explained that I had underestimated the materials' moisture absorption. Although Prusa does state it in the instruction manual, hearing it from a person helped get the message through. So I dried the PEI filament for 4 hours and placed it immediately in the Dry Box to print a clamp. In this case, the object – which I erroneously printed horizontally – did come out clear but resulted in warpage so significant that it made it impossible to use. For my final attempts, I went back to the basics.

[![](https://www.voxelmatters.com/wp-content/uploads/2025/03/Prusa_Pro_HT90_review_IMG_5386-640x480.jpg)](https://www.voxelmatters.com/wp-content/uploads/2025/03/Prusa_Pro_HT90_review_IMG_5386.jpg)

A comparison between the sample part Prusa sent me and the best PEI part i managed to print.

[![](https://www.voxelmatters.com/wp-content/uploads/2025/03/Prusa_Pro_HT90_review_IMG_5388-640x480.jpg)](https://www.voxelmatters.com/wp-content/uploads/2025/03/Prusa_Pro_HT90_review_IMG_5388.jpg)

Dimensionally it was accurate which was good for a relatively intricate design

[![](https://www.voxelmatters.com/wp-content/uploads/2025/03/Prusa_Pro_HT90_review_IMG_5415-640x480.jpg)](https://www.voxelmatters.com/wp-content/uploads/2025/03/Prusa_Pro_HT90_review_IMG_5415.jpg)

While its size was admittedly quite small it shows the machine can easily print small tools

[![](https://www.voxelmatters.com/wp-content/uploads/2025/03/Prusa_Pro_HT90_review_IMG_5414-640x480.jpg)](https://www.voxelmatters.com/wp-content/uploads/2025/03/Prusa_Pro_HT90_review_IMG_5414.jpg)

This other skull sample was meant to mimic the challenges of printing a surgical guide. Accuracy was ok but needs some more practice on adjusting the systems’ settings.

PEI is primarily used for CMF and dental surgical guides (that can be sterilized) and manifolds that must withstand high temperatures. Because I have no immediate need (nor 3D models) for either, I 3D printed the most similar objects: a skull-shaped ashtray and a Klein-bottle-shaped bottle opener. Both came out with a decent transparency and dimensional accuracy, which means that the High-Temperature print head can proficiently extrude the material at over 400°C. Eventually, I realized that the chamber temperature is one of the main challenges for printing PEI. The Prusa Pro HT90 can hold up to 90°C, which is great for most materials but represents the bare minimum for PEI 1010 (which would benefit from chamber temperatures up to 190°C). Thus, I can say that the machine can certainly print small, circular parts, but – as far as my own experience – the verdict is still out on larger parts.

![](https://www.voxelmatters.com/wp-content/uploads/2025/03/image.jpg)

#### PEEK-CF

Finally, we get to PEEK, specifically a PEEK carbon fiber composite. The material I used—supported by the Prusa Slicer—was CARBONX PEEK+CF10 from 3DXTech. It's an ultra-tough material but, thanks to the chopped carbon fiber reinforcement, it is surprisingly easy to print with the Prusa HT90 and the High-Temperature printhead (after drying in the Memmet oven).

I printed several objects to test the material's strength. The first was a clamp, the same one that failed using PEI. It came out perfectly with all screw-on parts fitting without issues. I used to hold several wooden boards for an IKEA hack that I needed to saw off with a circular saw (yes, I did all this in my office and even printed a custom accessory bag to capture the sawdust). Another helpful part I 3D printed was a windshield ice scraper that came out quite well, with no warpage and no extrusion issues.

[![](https://www.voxelmatters.com/wp-content/uploads/2025/03/Prusa_Pro_HT90_review_IMG_5198-640x480.jpg)](https://www.voxelmatters.com/wp-content/uploads/2025/03/Prusa_Pro_HT90_review_IMG_5198.jpg)

Printing with PEEK CF was a great experience from the start

[![](https://www.voxelmatters.com/wp-content/uploads/2025/03/Prusa_Pro_HT90_review_IMG_5199-640x480.jpg)](https://www.voxelmatters.com/wp-content/uploads/2025/03/Prusa_Pro_HT90_review_IMG_5199.jpg)

The PEEK CF clamp came out perfectly

[![](https://www.voxelmatters.com/wp-content/uploads/2025/03/Prusa_Pro_HT90_review_IMG_5197-640x480.jpg)](https://www.voxelmatters.com/wp-content/uploads/2025/03/Prusa_Pro_HT90_review_IMG_5197.jpg)

Screw on parts worked well.

[![](https://www.voxelmatters.com/wp-content/uploads/2025/03/Prusa_Pro_HT90_review_IMG_5194-640x480.jpg)](https://www.voxelmatters.com/wp-content/uploads/2025/03/Prusa_Pro_HT90_review_IMG_5194.jpg)

[![](https://www.voxelmatters.com/wp-content/uploads/2025/03/Prusa_Pro_HT90_review_IMG_5191-640x480.jpg)](https://www.voxelmatters.com/wp-content/uploads/2025/03/Prusa_Pro_HT90_review_IMG_5191.jpg)

[![](https://www.voxelmatters.com/wp-content/uploads/2025/03/Prusa_Pro_HT90_review_IMG_5139-640x480.jpg)](https://www.voxelmatters.com/wp-content/uploads/2025/03/Prusa_Pro_HT90_review_IMG_5139.jpg)

This ice-scraper also looked nice

Finally decided to take a chance and use this material to print a larger part. I don't have an immediate need for engine manifolds, which I think PEEK CF is suitable for, so I decided to print an entire model engine ([Working V6 Engine](https://www.printables.com/model/1195926-working-v6-engine/files) from Printables). At 100% size, the engine block alone had a 9-hour and 37-minute printing time, even with 3 mm layers. The pre-sets for printing with high-temperature material are slower than those that can be implemented with lower temperature materials. However, this gave me ample time to test the system's reliability with tough materials. I dried the filament for over 4 hours, however, I printed the part several hours after I placed the spool in the Dry Box. Still, the print was completed without any issue at all. There was no warpage, and the model stuck perfectly on the plate.

[![](https://www.voxelmatters.com/wp-content/uploads/2025/03/Prusa-Review-IMG_5437-640x480.jpg)](https://www.voxelmatters.com/wp-content/uploads/2025/03/Prusa-Review-IMG_5437.jpg)

[![](https://www.voxelmatters.com/wp-content/uploads/2025/03/Prusa-Review-IMG_5438-640x480.jpg)](https://www.voxelmatters.com/wp-content/uploads/2025/03/Prusa-Review-IMG_5438.jpg)

[![](https://www.voxelmatters.com/wp-content/uploads/2025/03/Prusa-Review-IMG_5443-640x480.jpg)](https://www.voxelmatters.com/wp-content/uploads/2025/03/Prusa-Review-IMG_5443.jpg)

 

The images above show how the part came out of the printer, uncleaned, and with supports that have not yet been removed. By the way, the Prusa Slicer's way of creating supports makes it very satisfying to pull them out but PEEK CF supports are still very tough to remove.

![](https://www.voxelmatters.com/wp-content/uploads/2025/03/Prusa-ReviewIMG_5571-copia.jpg)

To better understand the dimensional stability that could be achieved for the entire assembly, I printed the six pistons at a .1 mm layer height. They came out looking clean and fit right in, with their rod and inside the engine block. In another test, I printed the cover of a Ferrari Daytona engine, which also came out on the first try with no evident errors. Remember that these complex models are not the ideal parts to print with this material. PEEK CF is made for functional parts, which are not overly intricate in support removal and possibly in their real size (so not too small). To get the best results you'll have to print it slowly, with thinner layers for best surface quality.

For now, though, I got the answer to my question: a Prusa printer can print PEEK (at least PEEK composites). Even I could. I'm sure anyone with professional printing experience can get much more out of it.