I've been in touch with Dometic, Camping World, and another large RV parts place. They all have different answers and they take a long time to come up with an answer. The Dometic web site is fairly worthless at determining what accessories (thermostats, control boxes, strip heaters, etc...) are needed with each system.
So far, I've ordered a Brisk Air 2 unit with ceiling controls. That way I'll have something that is simple and works. I'll plug it in to my existing control box and see if that works. If it does, I'm good. Otherwise, I'll figure which control box is needed and which thermostat will work. So far I've been advised to purchase several types of control systems. Don't see the need to purchase multi zone systems with fancy thermostats, when I only need single zone control of one AC and furnace (no heat pump or heat strip).
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