Fans ensure heaters to be placed outdoors with clean heated air directed indoors; Heat exchanger keeps exhaust gas and hot air separate; Heats up to 5925 sq ft/47,400 cu ft; Heating area 74' x 80' x 8' or 60' x 79' x 10'; 28 gallon tank runs approximately 12 hours; Ideal for tents, construction sites, warehouses, concrete curing, painting and sandblasting;
