Hcalory Twist-Lock Heater Adapter (3.5″ to 4″)
🔥 Nomad GearWorks 3.5-Inch to 4-Inch Twist-Lock Heater Adapter
Turn a proprietary outlet into a standard, modular heat system
Some heaters make great heat and then ruin the experience with a non-standard outlet size. The Hcalory heater uses a proprietary 3.5-inch hot air outlet with twist-lock tabs, making it incompatible with most off-the-shelf ducting and tent passthroughs.
This adapter fixes that.
The Nomad GearWorks Twist-Lock Heater Adapter converts the Hcalory 3.5-inch hot air outlet to a true 4-inch (100mm) outlet, allowing you to run standard 4-inch heater ducting directly into your NomadPort system. Twist it on, lock it in place, and build a clean, secure heat path from heater to tent with zero hacks.
This adapter is for the heater's hot air outlet only. It is not for the combustion exhaust pipe, which must always be routed outside and away from your tent.
🔗 Compatible Heater
Designed specifically for the Hcalory diesel heater with the 3.5-inch twist-lock hot air outlet.
👉 Compatible Heater Link
🔑 Key Features
🔒 True Twist-Lock Fit
Designed to interface directly with the two factory locking lips on the Hcalory heater outlet. Slide on, twist, and it stays locked in place without clamps, tape, or guesswork.
🔥 High-Temperature Carbon Fiber Nylon
Printed in PAHT-CF, a carbon fiber-reinforced nylon built to withstand continuous heater outlet temperatures without warping or softening. This is a functional heat component, not a cosmetic adapter.
📏 Converts 3.5-Inch to Standard 4-Inch
Steps the proprietary outlet up to a true 4-inch / 100mm diameter so you can use standard dryer hose, heater ducting, and NomadCoupler accessories.
🧲 NomadPort System Compatible
Pairs perfectly with the NomadCoupler 4-Inch, allowing a complete chain:
Heater → Twist-Lock Adapter → 4-Inch Duct → NomadCoupler → NomadPort
🏕️ Built for Field Use
No adhesives. No friction fit. No melting plastic. This adapter is designed for repeated installs, breakdowns, and real camping conditions.
🛠️ How It Works
- Align the adapter slots with the locking tabs on the heater hot air outlet
- Push on and twist to lock it in place
- Attach standard 4-inch ducting to the outlet
- Run ducting into your NomadPort using a 4-Inch NomadCoupler
- Twist off when breaking camp
🔹 What's Included
- 1 PAHT-CF carbon fiber nylon twist-lock heater adapter
- Converts Hcalory 3.5-inch hot air outlet to 4-inch / 100mm ducting
- Compatible with standard 4-inch hose clamps and ducting
⚠️ Safety & Responsibility
This is a ducting accessory. It is not a heater, not a combustion or exhaust component, and not a certified safety device. It does not make any heater safe to run in or near an enclosed space.
- This adapter fits the heater's hot air outlet only. Never connect it to the combustion exhaust pipe, and never route combustion exhaust into a tent or any enclosed space.
- Always follow your heater manufacturer's instructions.
- Keep heater exhaust outside the tent and away from fabric.
- Maintain proper ventilation and run a working carbon monoxide detector any time a heater is used in or near an enclosed space.
- Duct and adapter surfaces get hot in use. Keep them clear of fabric, bedding, gear, and skin.
- Secure all duct connections before running the heater, and check them each time you set up.
- Adult installation and supervision required.
Nomad GearWorks is not affiliated with or endorsed by Hcalory.
By purchasing, you accept full responsibility for installation and use, and you accept that Nomad GearWorks is not liable for injury, fire, carbon monoxide exposure, or damage to your tent, heater, or other property. Full details in our Terms of Service.
🛒 Why This Exists
You should not have to redesign your entire heating setup because one manufacturer chose a non-standard outlet. This adapter bridges that gap and brings the Hcalory heater into the Nomad GearWorks modular ecosystem cleanly, safely, and correctly.
Designed, tested, and printed by Nomad GearWorks.
Built for real heat, real camps, and people who hate workarounds.