The Mitsubishi 12,000 BTU 26.3 SEER single-zone heat pump system (MUZ-FS12NA & MSZ-FS12NA) is an extremely efficient heating and cooling option that can handle one mid-sized 550 sq ft room.

Unit Type Wall Mounted
Product Line FS-Series
Operating Mode Cooling & Heating
Low Ambient Heat Yes (Hyper Heating)
Number of Zones 1
System Capacity 12,000 BTU
Line Set Size 1/4" x 3/8"
WiFi Enabled Yes with Kumo Cloud or Aidoo wifi
WiFi Built In No

Indoor Unit MSZ-FS12NA
Outdoor Unit MUZ-FS12NA
*Remote comes with the indoor unit

Cooling Capacity 13,600 BTU
Heating Capacity 21,000 BTU
SEER2 26.3
EER 13.8
HSPF 11.1
Heating Minimum Temp -13 F
Cooling Minimum Temp 14 F
Room Cooling/Heating Capacity up to 550 sq ft

Triple-action filtration system combining a unique nano-platinum filter with electrostatic anti-allergy enzyme filter and deodorizing filter
Dual Barrier Coating applied to the heat exchanger, vanes and fan to prevent hydrophilic and hydrophobic dirt build-up
3D i-see Sensor® enables advance airflow and energy-saving features:
Multiple airflow options and double vanes for improved and more comfortable natural airflow patterns
Dehumidification mode for improved comfort
Weekly Timer
WiFi enabled (requires Kumo Cloud or Aidoo wifi Adapter)
Hot-Start Technology: no cold air rush at equipment startup or when restarting after Defrost Cycle
Outdoor Unit built-in base pan heater
Blue Fin anti-corrosion treatment applied to the outdoor unit heat exchanger for increased coil protection and longer life

Airflow Cooling CFM, Dry: 137–167–221–304–381
Airflow Cooling CFM, Wet: 117–143–190–261–328
Airflow Heating CFM, Dry: 140–167–225–325–437
Noise Level dB(A), Cooling: 20–23–29–36–40
Noise Level dB(A), Heating: 20–24–29–39–42
Size W x D x H: 36-7/16" x 9-3/16" x 12"
Weight: 29 lbs
Electrical: 208/230V, 1 A