I have one I use in my work truck and ice fishing shack. If the furnace quits in my RV I will use it in there as well. It is a 5KW which is just over 17000 btu. Works really well for what I am using it for. Silverado
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2015 FunFinder 210uds, 2014 Silverado LTZ-Z71 Regular Cab Short Box, 5.3l with towing package