This portable indirect fired heater is an ideal unit for a construction or manufacturing plant when heating is needed but moisture is to be avoided. At 500,000 BTU, this unit can help maintain temperature in many sizable spaces. Operating on LP or NG, the heater can easily be fixed to a fuel source and the heat can be ducted to any area of the job site or facility to provide clean, dry, warm air. With a 12″ duct attached, you can run the heat up to 100 feet into any space. Portability is not an issue with two wheels and easy lifting bar attached, rental heater can be mobilized by a single person and moved throughout your job site with ease. Can be placed indoors but requires a venting setup but can also side outside a building with ductwork attached, directing the warm, dry air where needed most.