Just had manual J calcs done for adding minisplits to our garage/recroom. The garage is 45' x 30' (1350 sq ft) and the recroom is 28' x 23' (644 sq ft). Ceilings are 9.5'. Calcs came in at a 14,000 btus for the garage and 8,000 btus for the recroom. I wanted to put a dual system in both of them...