This is the outdoor condenser (outdoor unit) for a Carrier Performance 25 multi-zone ductless heat pump system. It's built for homeowners who want to run up to five separate indoor heads — living room, bedrooms, a converted attic or garage — off one outdoor unit, without ductwork. This listing is the outdoor unit only; indoor heads, line sets, and mounting accessories are sold separately.
This outdoor unit is part of Carrier's Performance 25 lineup, an ENERGY STAR® certified multi-zone ductless heat pump platform rated up to 25.2 SEER2 across the family. This specific model, the 37MGRAQ36EA3 (36K size), is rated at 24 SEER2 / 12 EER2 / 9.5 HSPF2 as an AHRI-matched system rating (see technical table below for the matched-configuration figures pulled directly from Carrier's published data). It supports up to five indoor heads for zoned comfort in homes without ductwork. 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 37MGRAQ36EA3 — 36,000 BTU, variable-speed (inverter) compressor, multi-zone outdoor unit, R-454B (Puron Advance™) refrigerant
- Indoor Heads: NOT included. Compatible with up to 5 indoor units (wall mount, cassette, ducted, or floor/ceiling — model selection determines total zone capacity and BTU allocation); purchase separately and match per Carrier's AHRI-certified combination tables
Installation Requirements & Accessories
- Voltage: 208/230V single-phase, dedicated circuit required
- MCA / MOCP: 30.5A / 35A
- Refrigerant Piping (outdoor connections): Liquid pipe 5x1/4in; Suction pipe 3x3/8in + 2x1/2in
- Total Maximum Piping Length: 262.5 ft across all zones combined
- Line Set Sold Separately — this outdoor unit does not ship with a pre-charged line set; size and length must be selected per zone and per Carrier's long-line application guidance
- Professional installation required — R-454B is a mildly flammable (A2L) refrigerant and requires EPA Section 608-certified handling
- Not Included: indoor heads, line sets, wall sleeve, mounting brackets, disconnect/whip, condensate drain accessories
- Not Compatible With: 115V-only circuits; indoor units outside Carrier's AHRI-certified match list for the 37MGRA family
Pro-Installer Tip
Flare connections on R-454B multi-port outdoor units are unforgiving — an under-torqued or scored flare on any one of the five ports can leak slowly enough to pass a soap-bubble check yet still starve the system over a heating season. Confirm each flare with a calibrated digital torque wrench rather than "feel," and evacuate the full line set assembly below the manufacturer's required vacuum level before charging — refer to Carrier's installation instructions for the exact micron target for this model. This isn't optional paperwork: R-454B is an A2L refrigerant, and EPA Section 608 certification is required to purchase, handle, and recover it. Skipping the vacuum step is the single most common cause of long-line multi-zone systems underperforming their rated SEER2/HSPF2 numbers in the field.
Key Benefits
- Variable-speed (inverter-driven) compressor for steady temperature control across up to 5 zones
- Up to 24 SEER2 cooling efficiency and 9.5 HSPF2 heating efficiency in this AHRI-matched configuration
- Rated heating operation down to -13°F outdoor ambient
- Outdoor sound pressure as low as 64.5 dB(A) for this size
- Puron Advance™ (R-454B) refrigerant — 75% lower global warming potential than legacy refrigerants
- ENERGY STAR® certified platform (select sizes)
Technical Table
| Spec | Value | Unit |
|---|---|---|
| Model | 37MGRAQ36EA3 | — |
| Cooling Capacity | 36000 | BTU/h |
| SEER2 | 24 | — |
| EER2 | 12 | — |
| HSPF2 | 9.5 | — |
| Voltage | 208/230 | V, single-phase |
| Minimum Circuit Ampacity (MCA) | 30.5 | A |
| Maximum Overcurrent Protection (MOCP) | 35 | A |
| Outdoor Sound Pressure Level | 64.5 | dB(A) |
| Operating Range | -13 to 75 | °F |
| Refrigerant | R-454B (Puron Advance) | — |
| Liquid Pipe Size | 5x1/4 | in |
| Suction Pipe Size | 3x3/8 + 2x1/2 | in |
| Total Maximum Piping Length | 262.5 | ft |
| Net Weight | 168.87 | lbs |
| Zone Count | Up to 5 | indoor heads |
Note: See "Resources (System Manuals and Warranty)" Tab above for full specifications.
Compatibility & Fitment
- Compatible with dedicated 208/230V single-phase circuits only.
- Compatible with up to 5 indoor heads selected from Carrier's AHRI-certified match list for the 37MGRA family.
- Not compatible with 115V-only electrical circuits.
- Not a listed match for indoor units outside Carrier's published 37MGRA compatibility tables.
- Line set is NOT included — this is not a pre-charged DIY kit; sizing must follow the piping table above.
- Wall sleeve, mounting bracket, and indoor units are NOT included with this outdoor-unit listing.
FAQ
What breaker size do I need for this system?
For the 37MGRAQ36EA3, the Minimum Circuit Ampacity (MCA) is 30.5A and the Maximum Overcurrent Protection (MOCP) is 35A, on a dedicated 208/230V single-phase circuit. A licensed electrician should size the breaker and wire per local code and the unit's nameplate.
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 (A2L) refrigerant and requires professional installation by a licensed HVAC contractor. Installation by a licensed professional is required to maintain warranty coverage.
Is the line set included, and if not, what size do I need to buy?
The line set is not included with this outdoor unit. For the 37MGRAQ36EA3, the outdoor connections require liquid pipe sized 5x1/4in and suction pipe sized 3x3/8in plus 2x1/2in across the multi-zone ports. Indoor-side pipe sizing is set by each indoor unit's installation instructions.
Does this system work in cold climates (low-ambient heating)?
Yes. The published operating range for this outdoor unit is -13°F to 75°F, and Carrier states this heat pump can provide reliable heating down to -13°F.
Will the ceiling cassette fit between standard 16-inch on-center joists?
[NEEDS VERIFICATION] — this listing is for the outdoor condenser only. Joist compatibility depends on which indoor cassette model is paired with this unit, and that is not specified in this outdoor-unit data.
Compliance & Warranty
Installation by a licensed HVAC professional is required to maintain warranty. This system uses R-454B (A2L, mildly flammable) refrigerant; handling and recovery require EPA Section 608 certification. Upon timely registration on eligible equipment, Carrier's Consumer Choice Warranty offers either a 10-year parts-only limited warranty or a 5-year parts plus 3-year labor limited warranty — refer to the manufacturer warranty documentation in the Resources tab for exact eligibility terms and registration requirements.
