Mitsubishi PUZ-AK42NL2 3.5 ton ductless mini-split

Brand Mitsubishi ENERGY STAR certified Series P series Updated

Most Efficient
Mitsubishi Ductless mini-split

Model no. PUZ-AK42NL2***

Size
3.5 tons
SEER2
21
EER2
12
HSPF2
10.1

R-454B

Mitsubishi ductless mini-split from the P series line. Rated 18.7 to 21 SEER2 across 3 certified matchups.

Model

Model number PUZ-AK42NL2***
Product series P series
Stages Variable speed

Performance

Nominal size 3.5 tons
Cooling capacity 42,000 BTU/h
Heating capacity 46,000 BTU/h
SEER2 21
EER2 12
HSPF2 10.1

Cold weather

Heating capacity at 17°F 29,600 BTU/h
Heating capacity at 5°F 25,400 BTU/h
COP at 5°F 2.7

Ratings across matchups

Lowest SEER2 18.7
Highest SEER2 21
Lowest HSPF2 9.3
Highest HSPF2 10.1
Certified matchups 3

Refrigerant

Refrigerant type R-454B

Ratings and warranty

AHRI reference number 218697007
ENERGY STAR certified Yes
ENERGY STAR Most Efficient Yes
On the market since October 1, 2026
ENERGY STAR listed August 11, 2026

Notes

Certified matchups

Top certified matchups for this outdoor unit, from ENERGY STAR data. Ratings depend on the indoor coil or furnace it is paired with.

Indoor unit Furnace SEER2 EER2 HSPF2 AHRI ref.
PLA-AE42NL*** 21 12 10.1 218697007
PVA-AA42NL*** 19.1 11.1 9.4 218697010
PEAD-AA42NL*** 18.7 11.1 9.3 218697009