If we would put a mini-split in the garage and the house, we could use the garage as a heat source in the winter to get heat from for the house. -- This really means we need smarter HVAC/mini-split systems to allow using a garage or other area as a secondary heat source/sink rather than just an inside vs outside perspective. Even stealing heat from another section of a building and moving it to another is preferable (with a lower delta T) vs inside vs outside fairly often. Especially with some minisplits getting high heat transfer ratings.
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