The Pureheat 1260 hydronic air heater produces 20 percent more heat than its companion model, the Sahara. Three Heat Xchangers are available: HX200 produces 200,000 Btu/hour; HX100 produces 100,000; or the HX50, at 50,000 Btu/hour. A variable-speed blower allows for heat to be provided where most needed. For jobsite compatibility, the unit runs on three different fuels: diesel, propane and natural gas. Conversion can be done in the field, in minutes, the company says.