Propane Generates the Heat
Propane provides the heat. The battery powers the airflow fan. Each system does what it does best.
Move warm air toward where you sit.
InoKraft is a portable propane heater with a built-in fan. Propane makes the heat. The Swap-On battery powers the fan and controls. The fan moves warm air forward, so you feel heat sooner in cold outdoor setups.
Part of the Swap-On ecosystem
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Heat Pushed Forward
The built-in fan moves warm air toward people instead of leaving most of it to rise above the heater.
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Anti-Frost Performance
Internal heat routing helps reduce cylinder frost, so propane output can stay steadier in cold conditions.
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Certified Indoor Safe
Advanced shut-off sensors protect against tip-overs and low oxygen, ensuring safe and comfortable heat wherever you set up.
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Swap-On Power
The Swap-On battery powers the fan and controls. It does not create heat.
Inside the heating system.
- 01
Top Warmer
The top surface gives your mug or small kettle a warm place to sit. It is for warming, not cooking.
- 02
Built-in Fan
One fan, two jobs: pull heat off the surface and send it forward, and help keep the cylinder from frosting out in the cold.
- 03
Cylinder Bay
A standard 1 lb propane cylinder sits inside the body. Larger capacity tanks may also be used with a compatible adapter.
- 04
Swap-On Battery Platform
The Swap-On battery powers the fan and controls. It does not create heat.
Built-in airflow that brings heat forward to you.
Making heat is only half the job. InoKraft uses propane to create heat, then utilizes the Swap-On-powered fan to push it forward, putting the warmth right where you actually sit, work, and wait.
The Built-In Fan Pushes Heat Forward
Instead of letting heat rise to the ceiling, the high-velocity fan captures the heat and pushes it directly toward you.
Earlier Perceived Warmth
In early tests, forward airflow helped users feel heat sooner at normal sitting distance.
Methodology
"The heater's been running for ages. Why am I still cold?"
TRADITIONAL SETUP
Heat rises. You may still feel cold.
- HEATING EFFICIENCY Q=h·A·(Ts-Tf) Passive & Trapped Relies on natural convection. Without an active airflow, a stagnant "thermal boundary layer" forms over the heating element, acting like a blanket that traps heat. This severely limits heat transfer efficiency; most warmth pools uselessly straight up.
- HEAT DIRECTION Heat rises. You may still feel cold. Most portable heaters focus solely on making heat, allowing warmth to float straight up into the sky. You are forced to move closer, wait longer, or engineer your own workaround.
- COMFORT ZONE Huddled & Restricted Because the heat doesn't move horizontally, everyone is forced to crowd tightly around one narrow, single hot spot just to feel the radiant warmth.
- EXTRA GEAR Cluttered Add-ons Requires buying, packing, and powering a separate tent fan and warming accessories to patch the heater's limitations.
INOKRAFT (SWAP-ON)
Airflow moves heat toward where you sit.
- HEATING EFFICIENCY Q=h·A·(Ts-Tf) Active & Directed The built-in fan helps move warm air forward instead of letting most of it rise above the heater. In early tests, this helped users feel heat sooner at normal sitting distance.
- HEAT DIRECTION Airflow moves heat toward where you sit. Forward airflow moves warm air toward people, while the top surface gives your mug or small kettle a warm place to sit.
- COMFORT ZONE Expanded & Shared The active airflow comes directly to you, dynamically expanding your comfort zone so everyone can enjoy the warmth without crowding.
- EXTRA GEAR Seamlessly Integrated Both the high-velocity fan and the warming top are fully integrated into a single cohesive unit. Zero add-ons or modifications needed.
HEATING EFFICIENCY Q=h·A·(Ts-Tf)
Passive & Trapped Relies on natural convection. Without an active airflow, a stagnant "thermal boundary layer" forms over the heating element, acting like a blanket that traps heat. This severely limits heat transfer efficiency; most warmth pools uselessly straight up.
HEATING EFFICIENCY Q=h·A·(Ts-Tf)
Active & Directed The built-in fan helps move warm air forward instead of letting most of it rise above the heater. In early tests, this helped users feel heat sooner at normal sitting distance.
HEAT DIRECTION
Heat rises. You may still feel cold. Most portable heaters focus solely on making heat, allowing warmth to float straight up into the sky. You are forced to move closer, wait longer, or engineer your own workaround.
HEAT DIRECTION
Airflow moves heat toward where you sit. Forward airflow moves warm air toward people, while the top surface gives your mug or small kettle a warm place to sit.
COMFORT ZONE
Huddled & Restricted Because the heat doesn't move horizontally, everyone is forced to crowd tightly around one narrow, single hot spot just to feel the radiant warmth.
COMFORT ZONE
Expanded & Shared The active airflow comes directly to you, dynamically expanding your comfort zone so everyone can enjoy the warmth without crowding.
EXTRA GEAR
Cluttered Add-ons Requires buying, packing, and powering a separate tent fan and warming accessories to patch the heater's limitations.
EXTRA GEAR
Seamlessly Integrated Both the high-velocity fan and the warming top are fully integrated into a single cohesive unit. Zero add-ons or modifications needed.
"Why can't the heater also warm my coffee?"
We heard that — a lot. So we built it in.
The top surface gives your mug or small kettle a warm place to sit during cold setups. It is for warming, not cooking.
Anti-frost propane stability
When tanks frost, output drops — and flames die. InoKraft routes heat internally toward the cylinder zone to fight frost buildup and support steadier performance in cold conditions.
Meet the Swap-On battery platform: swap across seasons, swap between devices.
Why pack multiple chargers? Our shared 4V platform powers your entire outdoor ecosystem. From our summer cooling fans to winter heated apparel and this new heater, one battery is all you need for year-round comfort.
New season. Same battery.
Swap On, Stay Unbound.
One battery, multiple devices.
Swap-On is built around reusable power for changing seasons, from summer airflow to winter layers and small outdoor tools.
Compatible gear will be shown as launch details are confirmed.
Built to move with winter plans.
Sized for real trips — car-side camping, garage sessions, and cold stops that don't wait for perfect weather.
- Weight
- Approx. 9.9 lbs (4.5 kg)
- Excluding battery and propane cylinder
- Dimensions
- 14.0 x 9.3 x 12.4 in (356 x 237 x 315 mm)
- Approximate product size
Cold places. Warm setup. Fast.
Winter Camping
Bring warmth directly to camp chairs, cold boots, and tent-side setups — heating people, not just the air above the heater.
Ice Fishing
Long hours on the frozen lake demand reliable heat. Stay consistently warm with directed airflow and cold-weather propane stability.
Garage Work
Aim warmth straight at the workbench, cold metal tools, and exactly where hands are actually working.
Long Cold Waits
Add focused, continuous warmth for freezing stationary hours in hunting blinds, deep-sky astrophotography sessions, or exposed shelters.
RV & Cabin Stops
Keep portable propane warmth close by for off-grid stops, tailgate coffees, and vehicle-side setups.
Backup Heat
Use it as a backup heat source only in approved, ventilated spaces. It is not a closed-room indoor heater.
Simple controls, clear feedback
Simple feedback and familiar controls help reduce trial-and-error during cold use.
Ambient Temperature
Fan Speed
Battery Level
Specifications.
A compact view of current product specifications.
Product basics
- Product type
- Portable propane heater
- Heat source
- Propane
- Top feature
- Warming surface for mugs or small kettles; not for cooking
Heating
- Heat output
- 4,000 / 6,000 / 9,000 / 12,000 BTU
- Heat settings
- 4 levels
- Forced-air system
- Built-in fan-assisted warm-air circulation
- Fan speeds
- 3 levels
- Estimated fan runtime
- Up to 6 hours at lowest fan speed
Power and fuel
- Battery use
- Powers fan and fan-speed control; does not generate heat
- Fuel type
- Propane (1 lb tank)
- Extended tank support
- Larger tank supported with additional adapter
Safety and size
- Safety features
- Patented cross-thread protection, emergency low-oxygen safety system, tip-over shutdown system, flame-retardant materials
- Ventilation
- Proper ventilation required
- Dimensions
- Approx. 14.0 x 9.3 x 12.4 in (356 x 237 x 315 mm)
- Weight
- Approx. 9.9 lbs (4.5 kg), excluding battery and propane cylinder
Propane heat, engineered with safeguards.
These safeguards reduce risk, but they do not replace proper ventilation, correct setup, and safe distance from flammable materials.
Low-oxygen shutoff system
Tip-over protection design
Ventilation-conscious heating
Clear status feedback
Coming soon on Kickstarter.
Join the launch list for updates, early access options, and behind-the-scenes testing notes.