M2 / M2 Lite P2S Chamber Heater

The ABS-GF housing has a nice matte finish, and the overall design looks clean and refined. It fits into the printer very well without looking out of place. Installation was also fairly straightforward: mount the unit where the auxiliary part cooling fan was originally installed, remove the back panel, route the cable through the rear housing, and connect the live and neutral wires to the original AC board terminals. There are quite a few screws to remove, but the process itself is not difficult. The chamber heating performance met my expectations as well. Using the testing method from the manual, I was able to confirm that the chamber temperature can reach 60��C. In actual use, I printed PC without any warping issues. Overall, this is an excellent product.

This chamber heater works extremely well. I honestly wish I had bought it sooner, because it has made a real difference with edge lifting and warping. The build quality feels refined, and for the price, it is absolutely worth it.

I had some edge lifting when I forgot to turn it on, but after cleaning the build plate and running the chamber heater, I printed several plates without any warping. The air purification feature is also very useful and helps reduce both odor and dust during printing.

Superb customer service, extremely fast shipping and delivery to Europe! I got the package in a meticulous condition. The item is packed nicely and has a great quality. The manual is very well detailed and provides clear instructions and know-hows for the proper assembly! And the package even includes the filters and the filter material. Recommended! Thank you very much!

Just testing it out, mainly printing with PETG. With the height riser open for ventilation and the glass top riser, the temp stays around 40°C. Closing all vents brings it up to 43°C. It would be even better if the unit could automatically adjust temperature and switch between hot and cold airflow.
After a few days of use, the results are really good—especially in this cold winter weather. Looking forward to seeing how it performs in summer. Print quality is amazing thanks to the consistent temperature. Installation was fairly straightforward and easy, and the non-destructive mount is excellent. It uses all the existing holes on the machine’s side panels perfectly, no modifications needed. Super well-thought-out design, thumbs up 👍🏻👍🏻

The official P2S lacks active chamber temperature control, which often leads to warping when printing engineering materials or large models. I saw MartilloTech’s P2S active chamber temperature kit was available, so I grabbed it right away to test. I also reinstalled the official exhaust fan backplate at the same time.
Installation isn’t too complicated—just follow the instructions. Once fitted, it doesn’t interfere with normal printer operation. In use, the blue light means cold air (perfect replacement for the stock left fan), and red light means hot air. Testing shows even heat distribution throughout the chamber and fast heating, making winter printing smooth and reliable.

Installation isn’t hard if you follow the tutorial step by step—just take your time and be careful.
Watch your wiring closely, otherwise it can get tangled with the hot bed cables and cause issues when the bed moves up and down.
Other than that, it’s really convenient to use. It even senses when printing starts and stops automatically.
Parts that used to warp really badly now have way less warping once I turn it on.

I installed a chamber heater and air filter on my P2P, and I seriously regret not doing it sooner!
The smell from printing ABS used to be absolutely choking, but now I don’t smell any fumes at all with the door closed, and all the dust and particles get filtered out completely.
On top of that, it maintains stable chamber temps, so my prints don’t warp anymore.
This upgrade completely maxed out my printing experience — total game-changer!

The biggest issue with printing large PETG and ABS parts on my new Bambu Lab P2S is warping. Even with a thick PEI plate, big parts still warp badly.
I originally wanted to DIY a chamber heater and temperature control, but I didn’t have time to mess with it, and I also cared about ease of use and safety. So I decided to go with a ready-made kit instead.
The Martillo unit is compact, easy to install, and keeps the chamber temperature stable. I’ve printed several large parts with almost no warping at all.

works& great. fixed warping issues with abs that were causing prints to lift and layer issues.

This updated review notes that the heater functioned for only six hours before a thermal fuse failed. Customer service reached out through the initial review and provided a new thermal fuse and fan. The parts arrived fairly quickly; I was occupied with work and installed them this weekend. Performance improved noticeably from those first six hours, making a significant difference for printing engineering filaments. I just completed a PPA-CF print, which turned out excellent. I appreciate the replacement parts; assembly involved only screws and plugs—no soldering—but routing the wires proved quite challenging.

The chamber heater works well and the build quality feels great. I tested the chamber temperature and it stayed above 55℃, although it did not quite reach 60℃. Overall, it is still a useful upgrade and helps create a more stable printing environment.

It worked great for 6 hours it kept the P2S at 63 degrees instead of 60 which set off MC Module warning then after 6 hours it just died best ASA print i ever did with the P2S but the quality of there products is junk I ordered a cheap generic with digital control the 3 heat temperature sucks 40-45-60 the filament cooler was DOA stay away from Martillo expensive junk that doesn’t work

You don’t need all that. Just switch to a smooth build plate, set your temperature above 65°C, and keep an eye on chamber temps during winter. Sealing up the A1 the same way works perfectly fine too — it’s more than enough for printing PETG.
If you’re serious about consistent chamber temperature control, just get the H2S. It’s basically a simplified version of the H2D, but it’s fast, reliable, and ultra-precise. It’s a bit pricey, but it’s a one-time investment.
I’ve had zero failed prints with the H-series so far. Printing with them is stress-free — no worrying about hardware issues, and ABS success rate is 100%.