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Help with proper sealing of ceiling cassette in attic
Hello! I've recently had a 3 ton Hyper Heat Mitsubishi Heat Pump and 3 Ceiling Cassettes installed. 15,000 and (2) 9000BTU units. My main question is how to seal them properly in the attic. I want to keep the cold air from getting into the conditioned space which means I must seal the air handler from the attic as well correct?
The installer just put some rigid foam over the top which means all the cold air will just come right through. I feel quite ignorant on this topic and would really appreciate some help!