Yes, this is an R22 version. I will check with the installer when they return this week regarding installing a new coil to handle the 12 SEER compressor. I had another installer for an estimate, and he, too, said that the inside unit should be fine for a 10-12 SEER unit. Anything over 12 would need a new coil. This was based on both of these contractors' previous experience in our condo complex units (all had same Lennox products when built in 1986).