11 diesel heaters at a checked price under $100.
Under $100 is the territory of bare-bones diesel air heaters, often a unit, a pump and a controller with little else in the box. They burn fuel efficiently for the money and can warm a van, cabin or workshop, but fit and finish vary widely between sellers.
Check what is included: fuel line, tank pickup, exhaust and intake pipes, silencer and a remote or controller. Confirm the voltage and whether altitude adjustment is supported if you camp high. Installation quality matters more than the badge, so plan for correct exhaust routing, a secure fuel supply and a carbon monoxide alarm in the living space.
Prices were last checked November 11, 2026. Product prices and availability are accurate as of that date and are subject to change; the price and availability shown on Amazon or the retailer's site at the time of purchase apply. As an Amazon Associate we earn from qualifying purchases.
A cheap split kit with Bluetooth control and automatic altitude adjustment, for DIY installs in vans and campers that travel high. Real output is far below 8 kW.
Amazon $86.98A very cheap heater with thermostat, app control and a two year warranty, for tents, garages and occasional van use. Expect closer to 4.2 kW than the 8 kW on the box.
Amazon $77.69A cheap split kit with Bluetooth control and automatic altitude adjustment, for DIY installs in vans and campers that travel high. Real output is far below 8 kW.
Amazon $86.98A bargain split heater kit for a van, truck or camper install, with app control and a thermostat. Expect about 3.5 kW of heat, not 8.
Amazon $99.99A small, cheap split heater with Bluetooth control and automatic altitude adjustment, sized for cars, small vans and boat cabins.
Amazon $99.90A bare-bones, very cheap split heater kit for DIY installs in trucks, campers and boats at low altitude. Real output is closer to 3 kW than 8.
Amazon $93.40A bare-bones split heater for DIY installs in trucks, RVs and boats on a tight budget. Real output is closer to 3 kW than 8.
Amazon $83.90A small, cheap split heater for cars, truck cabs and boat cabins, with a credible 2 kW rating and a 12V or 24V supply.
Amazon $94.90A cheap app-controlled split heater for DIY van and RV installs, though Hcalory publishes few specs for this 5 kW version.
Amazon $89.99A very cheap complete split kit with thermostat mode and a remote, for DIY installs in RVs, garages and trucks. Specs and support are thin.
Amazon $77.38A low cost 5 kW split kit for DIY truck and RV installs, sold with almost no published specs or warranty.
Amazon $87.47A budget 5 kW split kit with tank and remote for cars, vans and small shops, with few published specs to back it up.
Amazon $80.99A very cheap heater with thermostat, app control and a two year warranty, for tents, garages and occasional van use. Expect closer to 4.2 kW than the 8 kW on the box.
Amazon $77.69
