Amazon.com: Gasland MHA18R Propane Radiant heater, 18,000 BTU Warm Area up to 450 sq. ft, Portable Gas Heater for Garages, Workshops and Construction Sites, Ultra Quiet Propane Heater with LP Regulator Hose (
DuraHeat Portable Convection Kerosene Heater Provides 23,800 Btu's of Warmth DH2304S - The Home Depot
Mr. Heater Tough Buddy 9000-BTU Indoor/Outdoor Portable Radiant Propane Heater in the Propane Heaters department at Lowes.com