Is this true for outdoor space heaters that run on propane too? I was kind of thinking about one of these for a smallish outdoor space: Ciays Propane Fire Pits 28 Inch Outdoor Gas Fire Pit, 50,000 BTU Steel Fire Table with Lid and Lava Rock, Add Warmth and Ambience to Gatherings and Parties On Patio Deck Garden Backyard https://www.amazon.com/dp/B09GXJTTDN/ref=cm_sw_r_apan_glt_fabc_R491F8HRT9AC6XYG8N7B?_encoding=UTF8&psc=1