Jan 12, 2016 - 09:14 AM
That's a tuff question to answer since things like outside temperature, ceiling height and insulation properties would effect how big an area it will heat. But based on my experience (I have 1 in the RV, 1 at work and 2 at home) it would easily keep the main area of a 30' RV plenty warm at 30 degree temps and above. Below that you may need 2 if the area is broken up with walls and doors. For a little heater it does puts out a ton of heat, much more than any similiarly sized heater.