15,000 BTU Portable Radiant Propane Thermablaster If you're looking for another compact option, consider the 15,000 BTU Portable Radiant Propane Thermablaster ($78). It runs on propane, which means it's perfect for portability and great for activities like camping where there might not be electricity. Image Source: homedepot.com 15,000 BTU Portable Radiant Propane Thermablaster $78 from homedepot.com Buy Now