https://www.northerntool.com/produc...-propane-heater-18-000-btu-model-mh18b-173635 18,000 BTU Mr. Heater Big Buddy Portable Indoor/Outdoor Propane Heater (MH18B) on sale for $99.99. Shipping is $9.99 but varies by location or choose store pickup/free ship to store where stock permits