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The Carrier 38MHRCQ Comfort Series is an R-410A single-zone ductless heat pump designed for efficient heating and cooling without ductwork. Its inverter-driven compressor adjusts output to match the room load, helping maintain steady comfort with reduced temperature swings. Available in 208/230V variations from 9,000 to 36,000 BTU/h, it is ideal for additions, basements, garages, sunrooms, and hard-to-condition spaces.
The Carrier 38MHRCQ Comfort Series ductless heat pump is designed for single-zone applications where comfort is needed without adding or extending ductwork. It connects an outdoor heat pump unit to a compatible indoor fan coil using refrigerant piping and electrical wiring, making it a practical option for renovations, additions, rooms above garages, basements, sunrooms, and spaces that are difficult to serve with a conventional ducted system.
This system uses inverter technology, allowing the compressor to vary its speed based on indoor and outdoor temperature conditions. Instead of repeatedly cycling on and off, the system adjusts output to help maintain more consistent room temperatures and improve comfort. Carrier notes benefits such as rapid pull-down or warm-up, improved humidity control through longer run times, low sound operation, microprocessor controls, auto restart, auto changeover, diagnostics, and built-in protection features.
Professional installation is important because ductless heat pump performance depends on proper equipment sizing, line-set length, refrigerant charge, electrical supply, mounting location, and outdoor clearance. The 38MHRCQ uses R-410A refrigerant. Carrier specifies minimum outdoor clearances, minimum piping length, maximum piping length, allowable lift, voltage requirements, refrigerant charge, and refrigerant connection sizes by model. The outdoor unit must also be mounted at least 2 inches above the maximum anticipated snow depth, and inverter-driven outdoor units cannot be stacked.
4Most Energy supplies and installs Carrier ductless heat pump systems with attention to correct sizing, equipment matching, refrigerant piping, condensate routing, electrical connection, safety testing, and final commissioning. A load assessment is recommended before selecting the final capacity.
| Model / System Size | Capacity | Efficiency | Refrigerant | Fuel Type | Venting Type | Electrical Requirements |
Dimensions | Weight |
|---|---|---|---|---|---|---|---|---|
| 38MHRCQ09, 208/230V | 9,000 BTU/h cooling; 10,000 BTU/h heating at 47°F |
21.5 SEER; 9.4 HSPF |
R-410A | Electric heat pump | No combustion venting required | 208/230-1-60; MCA 12A; MOCP 15A |
30.12" W x 21.85" H x 11.93" D | 55.11 lb |
| 38MHRCQ12, 208/230V | 12,000 BTU/h cooling; 12,000 BTU/h heating at 47°F |
20.5 SEER; 9.2 HSPF |
R-410A | Electric heat pump | No combustion venting required | 208/230-1-60; MCA 15A; MOCP 15A |
30.12" W x 21.85" H x 11.93" D | 59.30 lb |
| 38MHRCQ18, 208/230V | 18,000 BTU/h cooling; 18,800 BTU/h heating at 47°F |
19.5 SEER; 8.7 HSPF |
R-410A | Electric heat pump | No combustion venting required | 208/230-1-60; MCA 15A; MOCP 20A |
31.69" W x 21.81" H x 12.99" D | 73.85 lb |
| 38MHRCQ24, 208/230V | 24,000 BTU/h cooling; 24,000 BTU/h heating at 47°F |
18.5 SEER; 8.6 HSPF |
R-410A | Electric heat pump | No combustion venting required | 208/230-1-60; MCA 19A; MOCP 30A |
35.04" W x 26.50" H x 13.46" D | 97.88 lb |
| 38MHRCQ30, 208/230V | 30,000 BTU/h cooling; 30,000 BTU/h heating at 47°F |
21 SEER; 8.7 HSPF |
R-410A | Electric heat pump | No combustion venting required | 208/230-1-60; MCA 25A; MOCP 30A |
37.24" W x 31.89" H x 16.14" D | 142.86 lb |
| 38MHRCQ36, 208/230V | 36,000 BTU/h cooling; 36,000 BTU/h heating at 47°F |
18 SEER; 7.8 HSPF |
R-410A | Electric heat pump | No combustion venting required | 208/230-1-60; MCA 28A; MOCP 35A |
37.24" W x 31.89" H x 16.14" D | 150.13 lb |
Single-zone ductless outdoor heat pump system for heating and cooling applications.
Uses R-410A refrigerant.
Inverter-driven rotary compressor designed to vary compressor speed based on load.
Available 208/230V nominal capacities from 9K to 36K BTU/h, covering 0.75 to 3 tons.
Cooling efficiency up to 21.5 SEER and heating efficiency up to 9.4 HSPF, depending on model.
Low outdoor sound pressure ratings starting at 55 dB(A), depending on model.
Built-in crankcase heater and base pan heater on heat pump models.
Standard microprocessor controls, auto restart, auto changeover, diagnostics, and low-voltage controls.
Safety features include compressor time delay, high discharge temperature protection, low voltage protection, compressor overload protection, overcurrent protection, and IPM module protection.
| Model / System Size | Refrigerant Charge | Liquid Line | Suction Line | Total Maximum Piping Length |
|---|---|---|---|---|
| 38MHRCQ09, 208/230V | 1.59 lb | 1/4" | 3/8" | 82 ft |
| 38MHRCQ12, 208/230V | 1.79 lb | 1/4" | 1/2" | 82 ft |
| 38MHRCQ18, 208/230V | 2.98 lb | 1/4" | 1/2" | 98.4 ft |
| 38MHRCQ24, 208/230V | 3.92 lb | 3/8" | 5/8" | 164 ft |
| 38MHRCQ30, 208/230V | 6.17 lb | 3/8" | 5/8" | 164 ft |
| 38MHRCQ36, 208/230V | 7.5 lb | 3/8" | 5/8" | 213 ft |
| Model Variation | Capacity | Recommended Application | Recommended Occupants |
|---|---|---|---|
| 38MHRCQ09 | 9,000 BTU/h | Small bedroom, office, den, or compact room | 1–2 occupants |
| 38MHRCQ12 | 12,000 BTU/h | Larger bedroom, home office, sunroom, or small living area | 1–3 occupants |
| 38MHRCQ18 | 18,000 BTU/h | Medium room, basement area, addition, or garage workspace | 2–4 occupants |
| 38MHRCQ24 | 24,000 BTU/h | Large room, open area, larger basement, or high-load single zone | 3–5 occupants |
| 38MHRCQ30 | 30,000 BTU/h | Large open-concept area or oversized single-zone application | 4–6 occupants |
| 38MHRCQ36 | 36,000 BTU/h | Very large single-zone area where load calculation confirms demand | 5+ occupants |
Request installation quote
Submit product interest, project details, and site information to 4Most Energy.
System sizing consultation
A technician reviews the room size, insulation, windows, exposure, existing HVAC, electrical availability, and comfort goals.
Equipment recommendation
4Most Energy recommends the correct Carrier 38MHRCQ capacity and compatible indoor unit based on the application.
Installation scheduling
Installation date is confirmed after product availability, scope, and quote approval.
Removal of existing equipment
Existing equipment is removed where included in the approved installation scope.
Installation and system connection
Outdoor unit, indoor unit, refrigerant piping, communication wiring, condensate routing, and electrical connections are completed.
Safety testing
The system is checked for electrical safety, refrigerant circuit integrity, drainage, operating pressures, and correct startup.
Final commissioning
The system is tested in operating modes, controls are reviewed, and the homeowner receives basic operation guidance.
Payment terms are confirmed in the installation quote. Standard process includes quote approval, deposit or booking payment where required, final balance after installation, and optional enrollment in a maintenance plan.
Carrier Comfort Series heat pumps are covered by a limited parts warranty. For residential applications, parts are covered for 10 years to the original owner when properly registered within 90 days of original installation; otherwise, the parts warranty is 5 years, except where registration-based warranty limits are prohibited. Subsequent owners receive 5 years of parts coverage.
The warranty also states that the product must be installed properly by a licensed HVAC technician, remain in the original installation location, and be used and maintained according to the installation instructions, owner’s manual, and service information.
4Most Energy labour warranty coverage is provided according to the installation invoice or project agreement. Labour coverage terms should be confirmed at the time of purchase and may vary by installation scope.
For warranty service, the Carrier warranty document directs the owner to contact the installer. Defective parts must be returned through a registered servicing dealer for credit.
4Most Energy can assist with troubleshooting, warranty documentation, eligible parts replacement, and coordination of service where applicable.
Maintenance plans start from $12.99/month.
Maintenance plan benefits may include scheduled system checkups, filter and coil inspection, operating performance review, priority support, and reminders for seasonal service. Enrollment can be completed during installation booking or after system commissioning.
