This is the outdoor condenser (outdoor unit) only for a Carrier Infinity 27 single-zone ductless heat pump system, size 06 (6,000 BTU/h). It's built for homeowners or installers who already have — or are separately sourcing — the matching indoor head, line set, and mounting accessories. This listing does not include an indoor unit, line set, or installation kit.
Carrier's Infinity 27 line pairs a variable-speed outdoor condenser with a matched single-zone indoor head to deliver quiet, precise comfort without ductwork. This 37MAHAQ06AA3 outdoor unit is the 6,000 BTU/h ("06") size in the 37MAHA family, and it is ENERGY STAR® certified in its rated single-zone configuration. 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 37MAHAQ06AA3 (37MAHA family, size 06), variable-speed compressor, R-454B refrigerant
- Indoor head: NOT included. AHRI-matched indoor options for this outdoor unit include 615AHAQ06XA3, 45MCCAQ06XA3, and 45MBDAQ06XA3 — purchased separately
Installation Requirements & Accessories
- Voltage: 208/230V; 1-phase; 60Hz
- MCA: 12A / MOP: 15A
- Liquid line: 1/4 in (6.35mm); Suction line: 3/8 in (9.52mm) — line set sold separately
- Professional installation required; refrigerant is R-454B (A2L mildly flammable classification)
- Not included: indoor unit, line set, wall sleeve, grille, mounting bracket, or disconnect
- Not compatible with 115V-only circuits
- Not a listed match for indoor models outside the AHRI-certified combinations named above
Pro-Installer Tip
R-454B systems are unforgiving of sloppy flare connections — a slightly under-torqued or scored flare face is where slow leaks and nuisance faults start. Torque every flare joint to the fitting manufacturer's spec with a digital torque wrench rather than "feel," and always evacuate the line set to the technician's target vacuum level before charging to remove moisture and non-condensables that degrade long-term efficiency. Because R-454B is an A2L mildly flammable refrigerant, EPA Section 608 certification and A2L-rated recovery/handling practices apply to anyone opening this system.
Key Benefits
- Variable-speed compressor for steady, low-swing temperature control rather than on/off cycling
- Outdoor sound pressure as low as 53 dBA at this size
- Puron Advance™ (R-454B) refrigerant, rated by Carrier as 75% lower global warming potential than legacy refrigerants
- Rated heating output published down to 5°F (H42 test point) for cold-weather performance
- ENERGY STAR® certified in its matched single-zone configuration
| Spec | Value | Unit |
|---|---|---|
| Cooling Capacity (DOE A2 - 95°F) | 6000 | Btu/h |
| Cooling Capacity (DOE B2 - 82°F) | 6700 | Btu/h |
| Heating Capacity (DOE H12 - 47°F) | 7000 | Btu/h |
| Heating Capacity (DOE H32 - 17°F) | 7900 | Btu/h |
| Heating Capacity (DOE H42 - 5°F) | 7700 | Btu/h |
| SEER2 | 25.7 | Btu/h.W |
| EER2 (DOE A2 - 95°F) | 18 | Btu/h.W |
| EER2 (DOE B2 - 82°F) | 23.8 | Btu/h.W |
| HSPF2 IV | 14.8 | Btu/h.W |
| HSPF2 V | 11.5 | Btu/h.W |
| Voltage | 208/230;1;60 | V;Ph;Hz |
| MCA (Minimum Circuit Ampacity) | 12 | A |
| MOP (Maximum Overcurrent Protection) | 15 | A |
| Outdoor Sound Pressure Level | 53 | dBA |
| Liquid Pipe Size | 1/4 (6.35) | in (mm) |
| Suction Pipe Size | 3/8 (9.52) | in (mm) |
| Net Weight | 62.17 | lbs |
| Operating Range - Cooling | -22 to 122 (-30 to 55) | °F (°C) |
| Refrigerant Type | R-454B | - |
Note: See "Resources (System Manuals and Warranty)" Tab above for full specifications.
Compatibility & Fitment
- Matches AHRI-certified indoor units 615AHAQ06XA3, 45MCCAQ06XA3, and 45MBDAQ06XA3 (size 06 configurations only)
- Requires a dedicated 208/230V, 1-phase, 60Hz circuit — not compatible with 115V-only circuits
- Line set, wall sleeve, mounting bracket, and indoor unit are NOT included with this listing and must be purchased separately
- Not a verified match for indoor models outside the AHRI-listed combinations named above
FAQ
What breaker size do I need for this system?
For the 37MAHAQ06AA3 outdoor unit, the minimum circuit ampacity (MCA) is 12A and the maximum overcurrent protection (MOP) is 15A, on a 208/230V, 1-phase, 60Hz circuit.
Is professional installation required to keep the warranty valid, or is this a true DIY kit?
This is not a DIY kit. It uses R-454B refrigerant (an A2L mildly flammable classification) and requires professional installation by a licensed HVAC technician.
Is the line set included, and if not, what size do I need to buy?
The line set is sold separately. For the 06 size, 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 manufacturer data lists a heating rated capacity of 7,900 Btu/h at DOE H32 test conditions (17°F) and 7,700 Btu/h at H42 conditions (5°F) for this outdoor unit, with a published operating range down to -22°F (-30°C) for cooling.
Will this outdoor unit work with any indoor head I already own?
No. This outdoor unit is AHRI-rated only with specific matched indoor models, including 615AHAQ06XA3, 45MCCAQ06XA3, and 45MBDAQ06XA3. Pairing with an unmatched indoor unit is not a listed combination and is not covered by published performance ratings.
Compliance & Warranty
Installation by a licensed HVAC professional is required to maintain warranty. This unit uses R-454B refrigerant (A2L classification); handling and service require EPA Section 608 certification. Per Carrier's Consumer Choice Warranty, upon timely registration on eligible equipment you can select either a 10-year parts-only limited warranty or a 5-year parts plus 3-year labor limited warranty. [NEEDS VERIFICATION: exact warranty terms/registration deadline specific to this SKU — confirm against the manufacturer warranty document in the Resources tab.]
