This is the outdoor condenser (outdoor unit) for a Carrier Infinity 25 multi-zone ductless heat pump system. It supports up to five indoor heads, and is built for homeowners who want zoned heating and cooling in a home without ductwork. Indoor heads, line sets, and mounting accessories are sold separately.
This outdoor condenser is part of Carrier's Infinity 25 multi-zone lineup, AHRI-rated as a system alongside its matched indoor units (indoor units not included in this listing). The 30K size code supports up to five indoor zones and is designed for homes needing distributed comfort 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 37MGHAQ30EA3, family 37MGHA, size 30K, variable-speed compressor, R-454B refrigerant
- Indoor Units: Not included in this listing. Compatible indoor heads (wall mount, cassette, ducted, etc.) must be purchased separately and matched to an AHRI-certified combination.
Installation Requirements & Accessories
- Voltage: 208/230V; 1 Phase; 60Hz
- Line Set: Sold separately. Liquid line 1/4 in per port (up to 5 ports); suction lines 3/8 in and 1/2 in depending on port.
- Standard piping length per indoor unit: 24.6 ft (7.5m); total maximum system piping length: 262.5 ft (80m)
- Refrigerant: R-454B (Puron Advance), classified A2L — professional installation required
- Not included: Indoor unit(s), line set, wall sleeve, mounting bracket, thermostat/controller
- Not compatible with: 115V-only circuits; indoor units outside Carrier's AHRI-matched combinations for the 37MGHA family
- Professional installation required (R-454B, A2L refrigerant)
Pro-Installer Tip
Flare connections on multi-zone branch piping are the most common source of long-term refrigerant loss on these systems — a connection that "feels" tight by hand can still leak slowly under vacuum and cause nuisance low-charge faults or reduced capacity within the first heating season. Confirm each flare with a calibrated digital torque wrench to the manufacturer's spec, and pull the system down with a proper micron gauge before charging. This work falls under EPA Section 608 refrigerant handling requirements, and correct evacuation directly protects the system's rated 24 SEER2 efficiency — a poorly evacuated line set will not deliver the rated cooling or heating capacities shown on the nameplate.
Key Benefits
- Variable-speed (inverter-driven) compressor for precise temperature control with fewer on/off cycles
- Supports up to 5 indoor zones from a single outdoor condenser
- Rated Heating Maximum Capacity of 36000 Btu/h at 5°F outdoor ambient for cold-climate performance
- Outdoor sound pressure as low as 65 dBA at this size
- Puron Advance (R-454B) refrigerant, reduces global warming potential by 75% versus traditional refrigerants
- ENERGY STAR certified
Technical Table
| Spec | Value | Unit |
|---|---|---|
| Cooling Capacity (Rated, DOE A2 95°F) | 30000 | Btu/h |
| Heating Capacity (Rated, DOE H12 47°F) | 31000 | Btu/h |
| Heating Capacity (DOE H32 17°F) | 30000 | Btu/h |
| Heating Capacity (DOE H42 5°F) | 36000 | Btu/h |
| SEER2 | 24 | Btu/h.W |
| EER2 (DOE A2 95°F) | 13.2 | Btu/h.W |
| HSPF2 (IV) | 10.7 | Btu/h.W |
| HSPF2 (V) | 8.5 | Btu/h.W |
| Voltage | 208/230; 1Ph; 60 | V;Ph;Hz |
| Outdoor Sound Pressure Level | 65 | dBA |
| Net Weight | 211.86 | lb |
| Height | 38.39 | in |
| Width | 38.625 | in |
| Depth | 17.38 | in |
| Liquid Pipe Size | 5x1/4 (5x6.35mm) | in (mm) |
| Suction Pipe Size | 3x3/8+1x1/2 (3x9.52mm+1x12.7mm) | in (mm) |
| Min. Piping Length per Indoor Unit | 10 | ft |
| Standard Piping Length per Indoor Unit | 24.6 | ft |
| Total Maximum Piping Length per System | 262.5 | ft |
| Max Zones Supported | 5 | zones |
| Refrigerant | R-454B (Puron Advance) | — |
| Breaker Size / MCA / MOCP | [NEEDS VERIFICATION] | — |
Note: See "Resources (System Manuals and Warranty)" Tab above for full specifications.
Compatibility & Fitment
- Compatible with dedicated 208/230V single-phase, 60Hz circuits only.
- Supports up to 5 matched indoor units in a multi-zone configuration.
- Must be paired with Carrier indoor units listed in the AHRI-certified combination directory for the 37MGHA family — this listing does not include an indoor unit.
- Not compatible with 115V-only circuits.
- Not included: indoor head(s), line set, wall sleeve, mounting bracket, or thermostat/controller.
- Ceiling/joist fitment depends entirely on the indoor unit selected and is not covered by this outdoor-unit listing.
FAQ
What breaker size do I need for this system?
[NEEDS VERIFICATION] - The manufacturer data provided for this SKU does not list a specific MCA or MOCP/breaker size value for the size-30 outdoor unit. Confirm this against the unit's nameplate or the manufacturer's Product Data Sheet before wiring.
Is professional installation required to keep the warranty valid, or is this a true DIY kit?
This is not a DIY kit. This outdoor unit uses R-454B (A2L mildly flammable) refrigerant and requires installation, evacuation, and charging by a licensed HVAC professional. Installation by a licensed HVAC professional is required to maintain warranty.
Is the line set included, and if not, what size do I need to buy?
The line set is not included and must be purchased separately. For this outdoor unit, per-indoor-unit liquid line is 1/4 in and suction lines are sized 3/8 in and 1/2 in depending on the port, per the manufacturer piping table. Standard piping length per indoor unit is 24.6 ft, with a total maximum system piping length of 262.5 ft.
Will the ceiling cassette fit between standard 16-inch on-center joists?
This listing is for the outdoor condenser only and does not include an indoor cassette head. Joist fitment depends on the specific indoor unit you pair with this condenser, which is not specified in this listing's data.
Does this system work in cold climates (low-ambient heating)?
Yes. The manufacturer data shows this size-30 outdoor unit rated for a Heating Maximum Capacity of 36000 Btu/h at 5°F outdoor ambient, indicating continued heating output in cold-climate conditions.
Compliance & Warranty
Installation by a licensed HVAC professional is required to maintain warranty. This unit uses R-454B (A2L) refrigerant and must be installed per EPA Section 608 handling requirements. Carrier's Consumer Choice Warranty applies upon timely registration on eligible equipment: choose either a 10-year parts-only limited warranty, or a 5-year parts plus 3-year labor limited warranty. See the manufacturer's Product Data Sheet and warranty documentation in the "Resources (System Manuals and Warranty)" Tab above for exact terms and registration requirements.
