Is There A Good Replacement 15K BTU AC Unit For Older Duo Therm 600315.331 13.5K BTU AC?
Published 05/12/2026
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Question:
Will one of these 15k btu replace my Duo-Therm 600315.331 13.5K BTU AC, or do I need to stay with Dometic?
asked by: Soraya
Expert Reply:
Hey Soraya! Yes, the Advent Air # ADV76SR is a good replacement option for your 13,500 Btu Duo-Therm 600315.331. Since your current unit is also 13,500 Btu, this keeps you in the same cooling range instead of jumping up to a larger 15K unit.
If your current 13.5K unit kept the camper comfortable, I’d stay with that same size rather than automatically jumping to a 15K unit. The # ADV76SR is also low-profile, so it’s a nice choice if you want to keep the roof height down.
Just keep in mind # ADV76SR is the rooftop AC unit only. To complete the system, pair it with the Advent Air air distribution box with wall-mounted thermostat # ADV98SR, which works for ducted or ductless setups. Is your current setup tied into ceiling ducts, Soraya? Either way that unit will work well with the distribution box kit.
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