What refrigerant type does the Msz-Gl12Na use?
The Msz-Gl12Na uses R410A refrigerant. The unit requires a liquid pipe with 1/4 inch O.D. (flared connection) and a gas pipe with 3/8 inch O.D. (flared connection) for proper operation.
From the official Mitsubishi MSZ-GL12NA Wall-Mounted Air Conditioner manual, page 2
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