This is the outdoor condenser (outdoor unit) for a Carrier Infinity 25 multi-zone ductless heat pump system. It is built for homeowners who need to run multiple indoor heads — up to five — off one outdoor unit, without adding ductwork. This listing does not include any indoor unit, line set, or mounting accessories.
The Carrier Infinity 25 Multi-Zone High-Heat outdoor condenser is engineered for homes without ductwork that need multiple zones of comfort from a single outdoor unit. Matched indoor heads must be selected separately and verified against Carrier's AHRI-certified combination ratings for this outdoor model. 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 37MGHAQ36EA3, 36K BTU class, variable-speed compressor, R-454B (Puron Advance™) refrigerant
- Indoor unit(s): NOT included with this listing — select and purchase separately, matched by AHRI-certified combination rating
Installation Requirements & Accessories
- Voltage: 208/230V; 1-Phase; 60Hz — confirm your electrical service matches before ordering
- Liquid pipe size: 5x1/4in (5x6.35mm); suction pipe: 3x3/8in+2x1/2in (3x9.52mm+2x12.7mm)
- Standard piping length per indoor unit: 24.6 ft (7.5m); maximum total system piping length: 262.5 ft (80m)
- Line set sold separately — not included with this outdoor unit
- Not compatible with 115V-only circuits
- Not included: indoor unit(s), wall sleeve, mounting bracket, line set, communication cable
- Professional installation required — this unit uses A2L-classified R-454B refrigerant
Pro-Installer Tip
Flare connections on multi-port outdoor units like this one are a common source of slow refrigerant loss and nuisance "low charge" or communication fault codes if torqued incorrectly. Use a digital torque wrench set to the flare nut manufacturer spec for each individual port, and re-check every connection on multi-zone runs — five potential leak points instead of one. Evacuate the full line set and manifold below the target vacuum level with a calibrated micron gauge before releasing factory charge; [NEEDS VERIFICATION] — the manufacturer data provided does not state a specific target micron level for this model, so follow the printed installation instructions in the Resources tab. Any technician handling R-454B refrigerant must hold current EPA Section 608 certification.
Key Benefits
- Variable-speed compressor delivers steadier temperatures with fewer on/off cycles than single-speed systems
- Rated up to 23.1 SEER2 cooling efficiency and 10.7 HSPF2 heating efficiency for this 36K size
- Maintains rated 36000 Btu/h heating output down to 5°F outdoor ambient
- Outdoor sound pressure level of 65 dB(A)
- Supports up to five indoor zones from one outdoor condenser
- Uses Puron Advance™ (R-454B) refrigerant, rated for lower global warming potential than legacy refrigerants
Technical Table
| Spec | Value | Unit |
|---|---|---|
| Cooling Capacity (Rated, DOE A2 - 95°F) | 36000 | Btu/h |
| Heating Capacity (Rated, DOE H12 - 47°F) | 36000 | Btu/h |
| Heating Capacity (DOE H32 - 17°F) | 30000 | Btu/h |
| Heating Capacity (DOE H42 - 5°F) | 36000 | Btu/h |
| SEER2 | 23.1 | Btu/h.W |
| EER2 (DOE A2 - 95°F) | 13.1 | Btu/h.W |
| EER2 (DOE B2 - 82°F) | 17 | Btu/h.W |
| HSPF2 | 10.7 | Btu/h.W |
| Voltage | 208/230; 1Ph; 60Hz | V |
| Refrigerant Type | R-454B | - |
| Outdoor Sound Pressure Level | 65 | dB(A) |
| Net Weight | 211.86 | lbs |
| Unit Dimensions (H x W x D) | 38.39 x 38.625 x 17.38 | in |
| Liquid Pipe Size | 5x1/4in (5x6.35mm) | in |
| Suction Pipe Size | 3x3/8in+2x1/2in (3x9.52mm+2x12.7mm) | in |
| Min. Piping Length per Indoor Unit | 10 | ft |
| Standard Piping Length per Indoor Unit | 24.6 | ft |
| Max. Total Piping Length per System | 262.5 | ft |
| Zone Count (Max) | 5 | zones |
| Breaker Size / MCA / MOCP | [NEEDS VERIFICATION] | - |
Note: See "Resources (System Manuals and Warranty)" Tab above for full specifications.
Compatibility & Fitment
- This is the 36K outdoor condenser, model 37MGHAQ36EA3, from the Carrier 37MGHA family
- Compatible with dedicated 208/230V single-phase, 60Hz circuits only
- Supports up to five indoor zones — indoor units must be selected from Carrier's AHRI-certified matched combinations for this outdoor model
- Not compatible with 115V-only circuits
- Does NOT include any indoor unit (wall mount, cassette, ducted, or floor/ceiling) — indoor heads are sold separately
- Line set, wall sleeve, and mounting bracket are NOT included with this listing
FAQ
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 36K outdoor unit, the manufacturer data lists a liquid pipe size of 5x1/4in (5x6.35mm) and a suction pipe size of 3x3/8in+2x1/2in (3x9.52mm+2x12.7mm) across the five possible zone connections. Standard piping length per indoor unit is 24.6 ft (7.5m), with a maximum total system piping length of 262.5 ft (80m).
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 technician to maintain the Carrier Consumer Choice Warranty.
What breaker size do I need for this system?
[NEEDS VERIFICATION] The manufacturer data provided does not list a specific MCA/MOCP breaker size for the 37MGHAQ36EA3 model. Confirm this figure from the Resources tab before purchasing breaker or wiring components.
Does this system work in cold climates (low-ambient heating)?
Yes. At 17°F, this unit's heating capacity is rated at 30000 Btu/h, and at 5°F it is rated at 36000 Btu/h, based on the manufacturer's published data for this model.
How many indoor units can I run off this outdoor unit?
This outdoor condenser supports up to five indoor units in a multi-zone configuration, per Carrier's published system overview for the 37MGHA family.
Compliance & Warranty
Installation by a licensed HVAC professional is required to maintain warranty. This unit uses R-454B (A2L) refrigerant, which requires EPA Section 608 certification to handle. Carrier's Consumer Choice Warranty applies upon timely registration: eligible equipment qualifies for either a 10-year parts-only limited warranty, or a 5-year parts plus 3-year labor limited warranty. This unit is ENERGY STAR® certified. Confirm exact registration terms and eligibility in the Resources tab.
