We a 350,000 BTU propane indirect Frost Fighter that uses vents to blow the heat inside a structure while the heater exhaust is outside. Shown here is also a 400 pound propane bottle on a two-wheel trailer. This heater can also be easily converted to natural gas.
This is a 350,000 BTU diesel powered Frost Fighter. It also uses vents to blow the heat inside a structure. Both heaters also have a 110 volt fan.