[rfuerst911sc]

Just for a data point my man cave garage is 24x26x12 foot high ceiling . Has 2x6 walls with R19 fiberglass insulation . The ceiling is also R19 . Two garage doors are insulated . So overall a fairly tight building .

The Mitsubishi 24k mini split can get the interior to meat locker quickly . I have never timed it but my guess is less than an hour after turn on . Likewise in heat mode it heats quickly . Just a single head unit .

Past experience with a 3 bay garage in my previous house again with a 24k Mitsubishi was similar . I guess in both cases my installer did a great job . When installed properly the performance is excellent in my opinion .