I did a lot of research on the ac units as I just bought one for my new build.... Was debating on going between the 13.5 and 15. After talking with the Dometic folks I bought the 13.5. The compressors are the same on the 2 units. The only difference is the 15k has a slightly larger condenser/exchanger. They told me both are going to drop the outside temperature the same amount, between 15 and 20 degrees. The larger one will do it a little quicker but not going to be able to make it any cooler inside. They use to make a real 15k unit that had a larger compressor in it but they stopped that a few years back as there wasn't that much difference apparently.
Hope it helps, that is what I could find from my research.
|