Armstrong Air.

4SHP15LE

Up to 15 SEER

Up to 8.5 HSPF

4SHP16LE

Up to 16 SEER

Up to 9.5 HSPF

4SHP17LE

Up to 17 SEER

Up to 16.2 SEER2

Up to 8.8 HSPF

Up to 7.5 HSPF2

4SHP20LX

Up to 20 SEER

Up to 10 HSPF

4SHP22LX

Up to 22 SEER

Up to 20.9 SEER2

Up to 11 HSPF

Up to 9.5 HSPF2

4SHP18LX

Up to 20 SEER

Up to 19 SEER2

Up to 10 HSPF

Up to 8.5 HSPF2