Mitsubishi recessed four-way ceiling cassette in unconditioned attic
I’m about to install a whole house minisplit system as part of a home remodel. Our attic is unconditioned and we are planning to install Mitsubishi recessed 4-way ceiling cassettes (SLZ-KR units). Note that the are ductless. They are NOT ducted minisplit concealed units.
Do I need to build a conditioned box around each unit in the attic, so that their body won’t effectively be in unconditioned space? Or do I just need to make sure that they get installed properly (air sealed) and that there is no insulation gap around them (and it’s ok if the top of the ceiling cassette is directly exposed to the unconditioned space)?
Thanks in advance for your help.
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