This is the outdoor condenser (outdoor unit) only for a Carrier Performance 26 single-zone ductless heat pump system, model 37MARAQ12AA3. It's built for homeowners and installers who need the 12,000 BTU/h outdoor half of a matched system — the indoor head, line set, and mounting accessories are sold separately.
This outdoor condenser is the compressor half of a Carrier Performance 26 single-zone heat pump system, rated for use with a matched indoor head sold separately. AHRI-certified system performance for the 37MARAQ12AA3 outdoor unit paired with a compatible indoor unit reaches up to 26 SEER2 and 13.9 HSPF2, per Carrier's published data. Note: If you would like to review the manufacturer Product Specifications, Warranty, Brochure, etc., for this system, please refer to the "Resources (System Manuals and Warranty)" Tab above on this page.
System Components
- Outdoor condenser: Carrier 37MARAQ12AA3 (family 37MARA, size 12), variable-speed inverter-driven compressor
- Indoor unit: NOT included with this listing — sold separately; compatible indoor styles include wall mount, 4-way cassette, 1-way cassette, slim duct, and floor console architectures per Carrier's 37MARA family documentation
Installation Requirements & Accessories
- Voltage: 208/230V;1Ph;60Hz (dedicated circuit required)
- Minimum Circuit Ampacity (MCA): 12A; Maximum Overcurrent Protection (MOP): 15A
- Refrigerant: R-454B (Puron Advance), classified A2L — professional handling required
- Refrigerant charge (factory): 2.03 kg (2.03 lb listed as 2.03(0.92) in source data — recorded here in kg per source)
- Liquid line: 1/4 in (6.35mm); Suction line: 3/8 in (9.52mm)
- Line Set Sold Separately — not included with this outdoor unit
- Not Included: indoor unit, wall sleeve, mounting bracket, disconnect box
- Not Compatible With: 115V-only circuits — this model requires 208/230V
- Professional installation required — this is not a DIY/pre-charged quick-connect system
Pro-Installer Tip
Flare connections on R-454B systems are unforgiving of under-torqued fittings — a loose flare nut on the 1/4 in liquid line or 3/8 in suction line is the leading cause of slow refrigerant loss and subsequent "low charge" fault codes on inverter-driven compressors like the one in this unit. Torque each flare joint to the fitting manufacturer's spec using a calibrated digital torque wrench, not a standard adjustable wrench, and always pull the system down and hold vacuum before charging. Because this unit uses R-454B (A2L, mildly flammable), the installing technician must hold a current EPA Section 608 certification covering low-GWP and A2L refrigerant handling — this is not optional shop practice, it is a regulatory requirement tied to the refrigerant classification itself.
Key Benefits
- Variable-speed inverter compressor delivers precise temperature control with reduced cycling compared to fixed-speed systems
- Outdoor sound level as low as 52.5 dBA at this size
- Cooling operating range down to -13°F and up to 122°F for extended-season performance
- Heating operating range down to -13°F, suited to cold-climate low-ambient heating applications
- Puron Advance (R-454B) refrigerant reduces global warming potential by 75% compared to prior-generation refrigerants, per Carrier
- Up to 26 SEER2 and 13.9 HSPF2 as a matched system, supporting ENERGY STAR-eligible efficiency
| Spec | Value | Unit |
|---|---|---|
| Component Role | Outdoor Condenser Only | — |
| Model | 37MARAQ12AA3 | — |
| Cooling Rated Capacity | 12000 | BTU/h |
| Heating Rated Capacity | 9300 | BTU/h |
| SEER2 (system, matched indoor) | Up to 26 | — |
| HSPF2 (system, matched indoor) | Up to 13.9 | — |
| Voltage | 208/230;1;60 | V;Ph;Hz |
| Minimum Circuit Ampacity (MCA) | 12 | A |
| Maximum Overcurrent Protection (MOP) | 15 | A |
| Outdoor Sound Level | 52.5 | dBA |
| Refrigerant Type | R-454B (Puron Advance) | — |
| Refrigerant Charge Amount | 2.03 (0.92) | lb (kg) |
| Liquid Pipe Size | 1/4 (6.35) | in (mm) |
| Suction Pipe Size | 3/8 (9.52) | in (mm) |
| Net Weight | 62.17 | lb |
| Gross Weight | 67.68 | lb |
| Cooling Operating Range | -13 to 122 (-25 to 50) | °F (°C) |
| Heating Operating Range | -13 to 75 (-25 to 24) | °F (°C) |
| Compressor Type | Variable-speed (Inverter Driven) | — |
| Zone Count | 1 (Single-Zone) | — |
| DIY Status | No — Professional Installation Required | — |
Note: See "Resources (System Manuals and Warranty)" Tab above for full specifications.
Compatibility & Fitment
- Matched indoor/outdoor AHRI system data lists this outdoor unit (37MARAQ12AA3) rated with indoor model 615AHAQ12XA3 at 12,000 BTU/h cooling and 9,300 BTU/h heating.
- Compatible with a dedicated 208/230V;1Ph;60Hz circuit only.
- Not compatible with 115V-only circuits.
- Indoor unit, line set, wall sleeve, mounting bracket, and disconnect box are NOT included — each must be purchased separately and matched to this outdoor unit by model number.
- Multiple indoor architectures (wall mount, 4-way cassette, 1-way cassette, slim duct, floor console) are available in the 37MARA family; confirm the specific matched indoor model with your installer before ordering.
FAQ
What breaker size do I need for this system?
For the 37MARAQ12AA3 outdoor unit, the Minimum Circuit Ampacity (MCA) is 12A and the Maximum Overcurrent Protection (MOP) is 15A. A licensed electrician should size the breaker and wiring per the National Electrical Code and local codes using these values.
Is professional installation required to keep the warranty valid, or is this a true DIY kit?
This is not a DIY kit. This unit uses R-454B (A2L) refrigerant and requires professional installation by a licensed HVAC contractor to maintain the manufacturer warranty.
Is the line set included, and if not, what size do I need to buy?
The line set is not included and is sold separately. For this model, the liquid line is 1/4 in (6.35mm) and the suction line is 3/8 in (9.52mm).
Does this system work in cold climates (low-ambient heating)?
The published heating operating range for this outdoor unit is -13 to 75°F (-25 to 24°C), and the cooling operating range is -13 to 122°F (-25 to 50°C).
What indoor unit does this outdoor condenser match with?
Manufacturer data lists this outdoor unit (37MARAQ12AA3) rated at 12,000 BTU/h cooling and 9,300 BTU/h heating in a matched-system table alongside indoor model 615AHAQ12XA3. Confirm the exact matched indoor unit part number with your installer or Carrier documentation before ordering, as multiple indoor architectures (wall mount, cassette, ducted, floor console) are compatible with the 37MARA outdoor family. [NEEDS VERIFICATION] for indoor unit style selection specific to your installation.
Compliance & Warranty
Installation by a licensed HVAC professional is required to maintain warranty. This unit uses R-454B refrigerant, an A2L-classified low-GWP refrigerant requiring EPA Section 608 certification for handling. Per Carrier's Consumer Choice Warranty, upon timely registration on eligible equipment, buyers may select either a 10-year parts-only limited warranty or a 5-year parts plus 3-year labor limited warranty. See the manufacturer warranty documentation in the Resources tab for exact terms and registration requirements.
