The Velit 4000W is a 12V fuel air heater rated at 14,000 BTU with a modulating range of 5,600–14,000 BTU. It runs on gasoline or diesel — whichever fuel your vehicle already carries — tapping your existing tank or a separate jerry can. Operating range is -40°F to 75°F ambient. No inverter, no shore power: 12V DC in, heat out.
The unit includes a built-in CO sensor and flammable gas sensor that shut the heater down automatically if dangerous accumulation is detected. A barometric pressure sensor adjusts the air-fuel ratio for altitude — tested above 11,000 ft in Colorado. Bluetooth thermostat control works up to 100 ft from the unit. Japanese glow plug is rated for 3× the lifespan of generic plugs. Controller is weather-sealed. Two-year limited warranty.
