Description
The MRCOOL Universal Series MDPH18048D is a 4-ton DC inverter heat pump package unit running low-GWP R-32 refrigerant. It reaches up to 18 SEER2 and 8.5 HSPF2, modulates its inverter compressor to match the load, and keeps heating down to -22°F outdoor temperature — a self-contained, all-electric system for homes that want cold-climate heat pump performance without a split system.
The MRCOOL® 2nd Generation Universal® Series 48K Inverter Packaged Heat Pump delivers efficient, dependable heating and cooling in a comprehensive system designed for year-round comfort. Built with advanced DC inverter technology, the compressor operates at variable speeds, adjusting output in real time to meet your home’s exact demands. This design reduces wasted energy, extends system life by minimizing wear, and keeping noise levels low.
With a strong 18 SEER2 efficiency rating, the Universal® 48K helps lower utility bills while maintaining powerful airflow and consistent performance. It is engineered to handle extreme climates, providing heat in temperatures as low as –22°F (–30°C) and cooling in conditions as high as 125°F (52°C). No matter the weather, homeowners can rely on this system to keep indoor spaces comfortable.
The use of R-32 refrigerant makes this model more environmentally responsible than systems using older refrigerants. With a lower Global Warming Potential, R-32 aligns with modern ecological standards and supports sustainable home upgrades. Installation flexibility is another benefit with a design that allows for vertical upflow/downflow and horizontal setup. This adaptability makes the Universal® 48K ideal for both replacement projects and new installations.
Durability and reliability are built in, with rugged construction to withstand year-round operation. Backed by a 10-year parts and labor warranty, the MRCOOL® Universal® Series 48K provides lasting value, comfort, and peace of mind for homeowners Find the Brochure HERE
Key Features
- DC inverter compressor: Variable-speed rotary compressor and EEV metering match output to the load.
- Cold-climate heating: Rated heating operation down to -22°F.
- R-32 refrigerant: Low-GWP, high-efficiency refrigerant.
- Quiet operation: 68 dBA outdoor sound rating.
- Optional electric heat: 6kW, 9kW, 12kW heat kits available.
- 10-year parts & labor warranty: MRCOOL base warranty covers parts and labor for 10 years.
Product Specifications
| Brand | MRCOOL |
|---|---|
| Model | MDPH18048D |
| Series | Universal Series |
| Nominal Capacity | 4 Ton (47,000 BTU) |
| Electrical Supply | 208/230V, 1-Phase, 60 Hz |
| SEER2 | 18 |
| EER2 | 11.2 |
| HSPF2 | 8.5 |
| Tonnage | 4 |
| Cooling Capacity (BTU) | 47,000 |
| Heating Capacity (BTU) | 47,000 |
| Voltage (V) | 208/230 |
| Phase | 1 |
| Cycle | 60 |
| Max Fuse Breaker (A) | 45 |
| Min Circuit Ampacity (A) | 39.1 |
| Color | Grey |
| Refrigerant Type | R-32 |
| Refrigerant Volume (oz) | 204.6 |
| Decibel Rating (dBA) | 68 |
| Inverter | Yes |
| Min Ambient Cool (°F) | 23 |
| Min Ambient Heat (°F) | -22 |
| Drain Connection Size | 3/4 |
| Compressor Motor Type | Inverter Rotary |
| Condenser Fan Motor Type | Direct Drive |
| Condenser Fan Motor RPM | 720 |
| Blower Motor Type | Direct Drive |
| Blower Motor Speeds | 10 |
| Blower Motor RPM | 1060 |
| Metering Device | EEV |
| Auxiliary Heater Included | No |
| Auxiliary Heater Available | Yes |
| Auxiliary Heater Sizes | 6kW, 9kW, 12kW |
| AHRI Certified | yes |
| Net Depth (in) | 44 |
| Net Height (in) | 49.25 |
| Net Width (in) | 44 |
| Net Weight (lb) | 628.3 |
Compatibility & Installation
- Electric heat: MRCOOL MDPHK06D (6 kW), MDPHK09D (9 kW) and MDPHK12D (12 kW) heat kits fit this unit — select one in the "Add an Electric Heat Strip" option above.
- Thermostat: Works with standard 24V thermostats; the MRCOOL MST04 smart thermostat is a matched option.
- Electrical: 208/230V single-phase, 60 Hz. Minimum circuit ampacity 39.1 A, maximum fuse/breaker 45 A.
- Professional installation: Must be installed by a licensed HVAC contractor following MRCOOL instructions and local codes.
