MRCOOL® Signature Series 36K Heat Pump System (Stud Mount) — MCAEAWPEF36E21AA + MCAESHS4T3621AA
Overview
This system combines the MRCOOL® Signature Series 36K stud mount air handler with a 3-ton Signature Series heat pump condenser for efficient heating and cooling year-round. The stud mount cabinet is designed to fit between standard wall studs and supports front or bottom return configurations for flexible installs.
Highlights
- Between-stud installation: Space-saving stud mount design for tight or unconventional installs.
- Flexible return air: Front or bottom return options to match your duct layout.
- Efficient airflow: ECM blower motor with multi-speed control for steady comfort.
- Cold-weather operation: Outdoor unit lists 5°F minimum ambient heating plus intelligent defrost.
- R-454B refrigerant: Modern, low-GWP refrigerant platform for updated compliance.
3 Ton (36K Class)
14.3 SEER2 • 7.5 HSPF2
3/8" Liquid • 3/4" Suction
Up to 150 ft
Sizing and performance depend on home load and installation details.
What’s Included
- Stud Mount Air Handler: MCAEAWPEF36E21AA
- Heat Pump Condenser: MCAESHS4T3621AA
- Documentation (see Documents & Downloads)
Indoor Specs
Model: MCAEAWPEF36E21AA (Signature Series Stud Mount Air Handler)
| Unit Type | Air Handler |
| Configuration / Mount | Stud Mount |
| Airflow Direction | Upflow |
| Tonnage | 3 Ton |
| Airflow (CFM) | 1095 |
| Sound | 57 dB(A) |
| Refrigerant | R-454B |
| Metering Device | Orifice |
| Drain Connection Size | 3/4" |
| Line Sizes | Liquid 3/8" • Suction 3/4" |
| Blower Motor Type | ECM |
| Blower Motor | 1/2 HP • 5 Speeds • 1000 RPM |
| Filter | Replaceable • 20" × 20" × 1" |
| Electrical | 208/230V • 1-Phase • 60 Hz |
| Min Circuit Ampacity (MCA) | 4.5A |
| Max Fuse / Breaker | 6A |
| Aux Heat | Not included • Optional heat kit available (5 kW, 7.5 kW, 10 kW) |
| Certifications | UL Listed • CSA Listed • ETL Listed • AHRI Certified |
| Color | Grey |
| Dimensions (W×D×H) | 22.125" × 19" × 39.5" |
| Net Weight | 110 lb |
| GTIN / UPC | GTIN 00840255595940 • UPC 840255595940 |
| Proposition 65 | Yes |
Designed to work with Signature Series top discharge condensers.
Outdoor Specs
Model: MCAESHS4T3621AA (Signature Series Split System Heat Pump Condenser)
| Unit Type | Split System Heat Pump Condenser |
| Tonnage | 3 Ton |
| Cooling / Heating Capacity | 33,000 BTU / 33,000 BTU |
| Efficiency | 14.3 SEER2 • 11.7 EER2 • 7.5 HSPF2 |
| Airflow (CFM) | 2750 |
| Sound | 63 dB(A) |
| Inverter | No |
| Min Ambient (Cooling) | 59°F |
| Min Ambient (Heating) | 5°F |
| Refrigerant | R-454B • 102.3 oz |
| Max Line Set Length | 150 ft |
| Line Sizes | Liquid 3/8" • Suction 3/4" |
| Compressor | Scroll |
| Condenser Fan Motor | PSC • 1/7 HP |
| Electrical | 208/230V • 1-Phase • 60 Hz |
| Min Circuit Ampacity (MCA) | 22.2A |
| Max Fuse / Breaker | 30A |
| Certifications | UL Listed • CSA Listed • ETL Listed • AHRI Certified |
| Color | Grey |
| Dimensions (W×D×H) | 29.14" × 29.14" × 25" |
| Net Weight | 173 lb |
| GTIN / UPC | GTIN 00840255595803 • UPC 840255595803 |
| Proposition 65 | Yes |
Designed to work with Signature Series multi-position or stud mount air handlers.
Documents & Downloads
- Signature Series Stud Mount Air Handler (MCAEAWPEF36E21AA)
- Signature Series Heat Pump Condenser (MCAESHS4T3621AA)
Important
- Stud mount configuration: Designed to fit between studs; supports front and bottom return air (verify clearances in the install manual).
- Line sizes: Both components list 3/8" liquid and 3/4" suction.
- Line set length: Outdoor unit lists up to 150 ft maximum line set length; verify long-line requirements in the install manual.
- Minimum outdoor temps: Outdoor unit lists 59°F minimum ambient for cooling and 5°F minimum ambient for heating.
- Electrical: Both components are 208/230V, 1-phase, 60 Hz. Verify breaker/fuse sizing per install manual and local code.
- Aux heat option: Air handler supports optional heat kits (listed as 5 kW, 7.5 kW, 10 kW) for added cold-weather comfort (sold separately).
FAQs
What is a stud mount air handler?
A stud mount air handler is designed to fit between standard wall studs, helping solve installs where a traditional cabinet won’t fit in a closet/utility space.
Does this system provide heating and cooling?
Yes. The outdoor unit is a heat pump condenser, so the system is listed for heating and cooling.
What refrigerant does it use?
Both components list R-454B.
How cold can it run in heating?
The outdoor unit lists a minimum ambient heating temperature of 5°F.
What warranty coverage is included?
Warranty is listed as 10-year limited parts, with limited lifetime compressor coverage referenced for the outdoor unit.
