MartilloTech P1S Chamber Heater Installation & Review: Is It the Best Upgrade for Your Bambu Lab P1S?

If you’re a Bambu Lab P1S owner on the hunt for a high-quality upgrade, you’ve likely asked the question: What’s the best 3rd party Chamber Heater for P1S? After unboxing, installing, and testing the MartilloTech Active Chamber Heater & Air Purification Kit—one of the most popular P1S-specific aftermarket options—this review breaks down exactly how it performs, how easy it is to fit, and whether it deserves the title of the top P1S Chamber Heater for hobbyists and makers alike. 

The Bambu Lab P1S is a standout 3D printer for its precision and speed, but it lacks a built-in active chamber heating system—a notable flaw for anyone printing temperature-sensitive filaments like ABS or Nylon, or for those who want to improve indoor air quality by filtering filament VOCs. MartilloTech’s kit aims to fix both pain points, with a P1S-customized design that promises seamless integration, controlled heating up to 60°C, and premium air filtration. Read on to see if it lives up to the hype as a leading P1S Chamber Heater. Why a Dedicated P1S Chamber Heater Matters Before diving into the unboxing and install, it’s worth highlighting why the search for a reliable P1S Chamber Heater is so important for P1S owners:

Inconsistent passive heating: The P1S relies on passive heat from the hotend and heat bed, leading to uneven chamber temperatures that cause warping and poor layer adhesion for ABS/Nylon and PC. You can read our related blog to get more information about that issue.

Enclosed printing traps filament volatile organic compounds, leaving residue on the P1S’s interior and door, and compromising air quality in home or office spaces—even for PLA and PETG.

Generic chamber heaters require awkward modifications to the P1S chassis, while P1S-specific kits like MartilloTech’s are built for a perfect fit with no permanent changes.

• Custom-molded active heating/purification main unit 
• Two sets of mounting screws
• Activated carbon filter cartridge 
• Color-coded power wiring harness 
• Instruction manual 

No generic plastic parts, no missing hardware—this attention to P1S-specific detail is a huge checkmark for anyone evaluating a top-tier P1S Chamber Heater. Step-by-Step Install: MartilloTech P1S Chamber Heater (Safety First!) Installing this kit is straightforward for the average P1S owner, with critical P1S-specific steps that avoid unnecessary modifications. Below is the P1S-specific install process

Clean the P1S’s chamber inner bottom and right-side chassis (facing the printer) to remove dust and debris—this ensures the P1S Chamber Heater unit mounts securely. Adjust the P1S: Lower the heat bed to its minimum height and move the print head to the far left to free up mounting space. Sort the hardware: Set aside the P1S-specific screws (separate from the X1 set) to avoid mix-ups.

Locate the two recessed slots on the P1S’s inner right chassis—these line up with two raised tabs on the bottom of the MartilloTech unit.

Align the tabs with the slots and set the P1S Chamber Heater in place. Pro Tip: Thread the power wiring harness through the P1S’s chassis opening before tightening the mounting screws (avoids rework later).

Secure the unit to the P1S chassis with the P1S-specific screws (do not overtighten), then apply the 3M foam tape to the bottom of the heater unit (not the P1S side panel)—this eliminates resonance and vibration during P1S printing, a common issue with cheaper P1S Chamber Heater options.

P1S rear fan: Unscrew the 4 fan mounting screws, then gently push the fan upward (it’s held by a P1S plastic clip) to create a small gap. Slide the fan backward to release it from the clip—this gap is for routing the P1S Chamber Heater’s wiring harness.

P1S waste bin: The bin is secured with 3 screws (2 visible on the surface, 1 hidden in a chassis hole). You’ll need two different metric wrenches (for different screw sizes) to remove it—this is the only minor tool hassle for US users installing a P1S Chamber Heater.

• Feed the MartilloTech power harness through the P1S’s fan/chassis gap—gentle force is safe, as the P1S’s plastic clip is durable. Route the harness along the P1S’s chassis motor side (avoid the high-heat P1S power supply area to prevent wiring damage).
• Remove the 6 screws on the P1S’s voltage regulator protective cover, then connect the harness by color: blue to blue, brown to brown. This P1S-specific wiring design means no guesswork—reverse wiring is nearly impossible, a big plus for first-time modders installing a P1S Chamber Heater.
• Reattach the protective cover and tuck any excess wiring neatly (avoid pinch points that could damage the harness when reassembling the P1S).

Reassemble your P1S in reverse order: replace the rear fan, rear panel (using your numbered screws), and waste bin. Your P1S is now fitted with the MartilloTech P1S Chamber Heater—ready to test! How to Use the MartilloTech P1S Chamber Heater with Your P1S The kit’s controls are intuitive and synced to the P1S’s printing workflow—a key feature for anyone calling it the best P1S Chamber Heater.

There’s no complicated programming, and all functions are designed to work with the P1S’s existing operations:

Does MartilloTech Deserve to Be Called the Best P1S Chamber Heater? (Testing Results) After 2+ months of daily testing on my P1S (printing PLA, PETG, ABS, and Nylon), here’s the honest verdict on whether this kit is the best P1S Chamber Heater for US users:

P1S print quality boost: Stable 60°C chamber temperatures cut ABS/Nylon warping on the P1S by 90%, with flawless layer adhesion— a massive improvement over the P1S’s passive heating, and a key advantage of this P1S Chamber Heater.

P1S air quality transformation: No more filament residue on the P1S door, and all VOC odors are completely eliminated—critical for the P1S’s enclosed design in home/office spaces, and a standout benefit of this P1S Chamber Heater.

P1S-native fit: Zero permanent modifications, no awkward gaps, and no interference with the P1S’s core functions (auto-leveling, bed heating, etc.).

Set-it-and-forget-it ease: Auto mode syncs perfectly with the P1S’s print jobs— the P1S Chamber Heater turns on when the P1S prints, off when it stops, with no extra input needed.

• The P1S rear panel’s 14 screws are tedious to remove/reinstall (labeling fixes this).
• The P1S waste bin requires two metric wrenches (a small tool investment for US users with no existing metric set).

Yes—the MartilloTech Active Chamber Heater & Air Purification Kit is, without a doubt, the best P1S Chamber Heater on the US market right now. It checks every box for P1S owners: P1S-specific design, easy installation, improved print quality, better air safety, and seamless integration with the P1S’s workflow. The minor install hassles are far outweighed by the value it adds to the P1S, making it a must-have upgrade for anyone looking to unlock the P1S’s full printing potential with a top-tier P1S Chamber Heater.

✅ P1S-customized design 
✅ H11(Easy upgraded to H13) HEPA + activated carbon filtration  
✅ Vibration-free mounting 
✅ Infrared P1S print head detection (auto mode sync) 
✅ Color-coded wiring 
✅ US-compatible instructions and easy filter replacements

❌ P1S rear panel screw removal is tedious (labeling mitigates this) 
❌ P1S waste bin needs two metric wrenches 

Disclaimer: This review is based on hands-on testing of the MartilloTech Active Chamber Heater & Air Purification Kit on a Bambu Lab P1S. All installation steps follow the manufacturer’s P1S-specific guidelines—always power down your P1S before performing any modifications. This review is unbiased, with no affiliate or sponsored ties to MartilloTech.