MRCOOL
MRCOOL Signature 4 Ton up to 14.3 SEER2 48,000 BTU Split System Heat Pump
4 Ton | SEER2 14.3 | R-454B | 208/230V
- 45000 BTU cooling capacity
- Up to 14.3 SEER2 rated efficiency
- Scroll compressor
- Uses R-454B refrigerant
Key Specifications
Product Overview
The MRCOOL® Signature Series 48k Heat Pump Condenser is a high-capacity, all-season system built to deliver powerful and efficient heating and cooling year-round. With a 14.3 SEER2 and 11.2 EER2 rating, it ensures consistent indoor comfort while helping reduce energy costs.
This model comes pre-charged with R-454B refrigerant, a modern, low-GWP alternative that complies with current environmental standards. It offers reliable performance with a smaller environmental footprint. The factory charge also speeds up installation, reducing labor time for contractors and minimizing hassle for homeowners.
A heavy-duty single-speed scroll compressor sits at the heart of the system, designed to provide steady operation across a wide range of conditions. Inner-groove copper tubing improves heat exchange, boosting system efficiency. Integrated temperature and pressure sensors protect against stress from extreme temperatures, while an intelligent defrost function prevents ice buildup during colder weather.
Despite its large output, the unit operates at a quiet 65 decibels, comparable to a typical dishwasher. A specially designed sound-control top helps reduce operating noise without affecting airflow, making it a good fit for residential areas.
Built for long-term durability, the unit features a steel louver coil guard and wire fan discharge grille to protect internal components from debris and damage.
With compact design, accessible service valves, and a 10-year limited parts warranty and a limited lifetime warranty, the MRCOOL® Signature Series 48k Heat Pump Compressor is a smart investment in year-round comfort and reliability.
Additional specifications
| UPC | 840255595827 |
|---|---|
| Series | Signature Series Heat Pump Condenser |
| Refrigerant charge (oz) | 144.6 |
| Heating capacity (BTU/h) | 45000 |
| Airflow (CFM) | 4000 |
| Cycle (Hz) | 60 |
| Min circuit ampacity (A) | 30 |
| Max fuse / breaker (A) | 50 |
| Inverter | No |
| Max line set length (ft) | 150 |
| Min ambient cooling (F) | 59 |
| Min ambient heating (F) | 5 |
| AHRI certified | Yes |
| ENERGY STAR certified | No |
| UL listed | Yes |
| ETL listed | Yes |
| Parts warranty (years) | 10 Year |
| Compressor warranty (yrs) | Limited Lifetime |
| Shipping W x H x D (in) | 30.3 x 34.8 x 30.3 |
| Shipping weight (lbs) | 232 |
Documents
- Installation manual (PDF)
- Brochure (PDF)
- Warranty (PDF)
- AHRI certificate (PDF)
- EnergyGuide label (PDF)
WARNING: This product can expose you to chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.p65warnings.ca.gov.
Technical Specifications
Performance
| System Type | Split System Heat Pump Condenser |
|---|---|
| Capacity | 45000 BTU |
| Tonnage | 4 Ton |
| Compressor / Stages | Scroll |
| SEER2 | 14.3 |
| EER2 | 11.2 |
| HSPF2 | 7.5 |
| Sound Level | 65 dBA |
Electrical & Fuel
| Voltage | 208/230V |
|---|---|
| Phase | Single Phase |
| Refrigerant | R-454B |
| Connection Size | Liquid 3/8" / Suction 3/4" |
Physical & Certifications
| Dimensions (W x H x D) | 29.14 x 32.875 x 29.14 |
|---|---|
| Weight | 223 lb |
| Color / Finish | Grey |
Shipping & Delivery
Manufacturer Warranty
Covered by MRCOOL's limited warranty. Warranty terms are set by MRCOOL and differ by product line — whether registration is required, and whether the installation has to be performed by a state-licensed HVAC contractor, is not the same across the range. In every case coverage depends on the unit being installed according to MRCOOL's instructions and all applicable codes and permits. MRCOOL's warranty document for this model is the controlling source; ask us and we'll send you the one that applies.
Professional Installation Recommended
Most HVAC equipment must be installed and connected by a licensed professional to remain safe, code-compliant, and eligible for manufacturer warranty coverage. If you're unsure about installation requirements, contact us before you order.
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