3.5 Ton 42,000 BTU Split System Heat Pump
Component — Not a Complete System
This is the outdoor unit only. To run, you also need a matching indoor air handler and a refrigerant line set. Looking for the complete system instead? Browse complete 41,000 BTU systems.
SKU MHP15042A
Customize it — compatible add-ons only
Same-capacity indoor unit this condenser is rated with — required to run.
Backup/auxiliary heat strips with circuit breaker — sized in kW by your installer.
Universally compatible tools and care items — maintenance kit, coil cleaner, install tools.
Sizing Help
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Description
3.5 Ton 42,000 BTU Split System Heat Pump
What's in the Box
Here's what you'll receive with your order
3.5 Ton 42,000 BTU Split System Heat Pump
As described
Key Specifications
41000BTU
Cooling Capacity
1750sq ft
Coverage Area
208-230V
Voltage
79dBA
Noise Level
40000BTU
Heating Capacity
3.5 Ton 42,000 BTU Split System Heat Pump — Model Details
What this specific model is sized for, how it installs, how it performs, and what it costs to run.
Room & Space Coverage — 41,000 BTU
The 3.5 Ton 42,000 BTU Split System Heat Pump delivers 41,000 BTU of cooling and heating capacity (3.5-ton class), sized for spaces up to 1,750 sq ft in standard 8-ft ceiling rooms with average insulation. At this capacity the unit is typically used for open-plan main floors, large garages, pole barns, finished basements, and small commercial bays. For homes with vaulted ceilings, heavy sun exposure, or poor insulation, plan on ~20% more BTU per square foot than the nominal coverage.
Efficiency & Operating Cost
This unit is rated at 15 SEER2. SEER2 measures seasonal cooling efficiency — higher is better — and 15 meets current federal baseline. For heating performance it carries a 8.2 HSPF rating, which translates to roughly 250–300% heating efficiency versus resistance electric — one kilowatt-hour of electricity moves three kWh of heat into the space at mild outdoor temperatures. Running the unit 8 hours a day at full load draws roughly 656 kWh/month — about $105/month at the US average $0.16/kWh residential rate. Real-world draw is usually 30–50% lower because inverter compressors modulate down most of the time.
Cold & Hot Weather Operating Range
On the cooling side the compressor runs down to 55°F outdoor ambient, useful for server rooms, grow rooms, and any space that needs year-round cooling.
Power & Electrical Requirements
Power requirement: 208-230V 1-phase 60Hz (standard US residential 240V service). Minimum circuit ampacity is 24.2A with a maximum overcurrent protection of 45A. Wire the outdoor unit with 6 AWG copper on a dedicated 45A double-pole breaker (or single-pole at 120V), with a disconnect within sight of the condenser per NEC 440.14.
Install Difficulty — Professional Install
This is a professionally-installed condenser that requires a licensed HVAC technician with EPA 608 certification. The tech will pull a vacuum on the line set to 500 microns, pressure-test with nitrogen, release the factory charge, and commission per MrCool's startup procedure. Budget 1 full day for install on a single-zone system. The system supports line set lengths up to 50ft; longer runs are available as accessory kits. Plan the shortest practical route — every 10ft of line set adds roughly 2% capacity loss. Ships with R-410A refrigerant. R-410A is a mature, widely-serviced refrigerant; service technicians and parts are available at any HVAC supply house.
Sound Level & Comfort Features
Rated sound output is 79 dB(A) at full operation.
Warranty & Certifications
When you register your unit within 60 days of purchase you get Registered 10 Year Parts Warranty on parts through MrCool's registered warranty program. Unregistered coverage drops to 5 Year Parts Warranty — registration takes 3 minutes at mrcool.com and is the highest-ROI post-purchase step you can take. AHRI certified and UL/ETL listed for North American electrical safety — required for most utility rebate and tax credit programs.
What's in the Box & Compatibility
Ships as a Split System Heat Pump.
Product Details
The MRCOOL 15 SEER Heat Pump Split System works diligently to make your home a comfortable space. This product gives you total energy efficiency with it's enhanced tube-and-fin coil design, allowing you to get more bang for your buck. You can have peace-of-mind with this product due to its affordability, quality, efficiency, and comfort. Look no further for your family's next home central heating and air system.
Specifications
| Cooling Capacity | 41,000 BTU |
| Heating Capacity | 40,000 BTU |
| SEER2 Rating | 15 |
| Voltage | 208-230 V |
| Refrigerant | R-410A |
| Noise Level | 79 dBA |
| Coverage Area | 1750 sq ft |
| Max Line Set | 50 ft |
| SEER Rating | 15 |
| HSPF | 8.2-8.5 |
| Tonnage | 3.5 Ton |
| Airflow | 1400-1450 CFM |
| Phase | 1 |
| Refrigerant Type | R-410A |
| Refrigerant Charge | 184 oz |
| Liquid Line Size | 3/8 |
| Suction Line Size | 7/8 |
| Country of Origin | Mexico |
Features
- Louvered construction with baked polyester finish over galvanized steel to withstand bad weather
- Raised coil to prevent debris blockage
- CoolGuard advanced corrosion resistant coil
- 4-screw louver panels, corner-mounted controlsand 45-degree offset valves for easy service.
- Enhanced tube-and-fin coil design featuring high efficiency heat transfer technology
- Thread-on pressure switches for simple, quick replacement
- Charged for 15 feet of line set
- Heavy-duty compressor sound blanket forquiet operation
- Internally protected against high temperature motor overload conditions
- Ships with filter drier
Frequently Asked Questions
Everything you need to know about this product
What size room will the 3.5 Ton 42,000 BTU Split System Heat Pump cool?
Do I need a licensed HVAC installer?
Is this unit eligible for the federal 25C tax credit?
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What size room does 41,000 BTU cover?
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Ships Nationwide — Shop by State
We deliver the 3.5 Ton 42,000 BTU Split System Heat Pump to all 50 states via FedEx, UPS, and truck freight. Each state page lists local rebate programs and utility incentives.