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Expedition Leader
OK guys here goes! I am having a hell of a time sizing a heater for my truck.
I currently have a 40k btu in a 17' floor length truck, its way too much, heater cycles a lot (short cycles). New truck is 12' floor length, but higher ceilings and better insulated. Walls will be R10.5, ceiling is R21. Windows will be double pane (although still not much R value).
From reading online, Airstream uses 20k BTU's in their 20' ish trailers, and 30k in their 31' ish trailers (but not official specs). Earth roamer uses 16k (? varies depending on what page you read on their website).
I am leaning to 30k, because IMO more is better than less (we camp below zero often), but I might get away with 20 or 25? I have an Webasto ST3500, but I think that may be too small at 12k btu's, and I am still going back and fourth on propane vs diesel.
What do you all use?
I currently have a 40k btu in a 17' floor length truck, its way too much, heater cycles a lot (short cycles). New truck is 12' floor length, but higher ceilings and better insulated. Walls will be R10.5, ceiling is R21. Windows will be double pane (although still not much R value).
From reading online, Airstream uses 20k BTU's in their 20' ish trailers, and 30k in their 31' ish trailers (but not official specs). Earth roamer uses 16k (? varies depending on what page you read on their website).
I am leaning to 30k, because IMO more is better than less (we camp below zero often), but I might get away with 20 or 25? I have an Webasto ST3500, but I think that may be too small at 12k btu's, and I am still going back and fourth on propane vs diesel.
What do you all use?