# MRCOOL Signature 4 Ton 45000 BTU 14.3 SEER2 7.5 HSPF2 R454B Split System Heat Pump Air Conditioning System

**Brand:** [MRCOOL](https://shop.coreranger.com/brands/MRCOOL)
**SKU:** MCHMPE48E21AA
**Price:** $3,849.65 · in stock
**URL:** https://shop.coreranger.com/product/mrcool-signature-4-ton-45000-btu-14-3-seer2-7-5-hspf2-r454b-split-system-heat-pump-air-conditioning-339770340

## Specifications

| Spec | Value |
|---|---|
| Model # | MCHMPE48E21AA |
| Pack Size | 1 |
| Compressor | Scroll |
| Internet # | 339770340 |
| Returnable | 90-Day |
| Filter Type | Replaceable |
| Store SKU # | 1015530299 |
| Voltage (V) | 220 V |
| Amperage (A) | 50 A |
| Power Options | Hardwired |
| Decibel Rating | 57 dBA |
| Number of Fan Speeds | 4 |
| Manufacturer Warranty | 10 year parts and lifetime compressor warranty. |
| Decibel (Sound) Rating | 57 dBA |
| Evaporator depth (in.) | 24.5 |
| Evaporator width (in.) | 22 |
| Heat Output (BTU/hour) | 45000 |
| Evaporator height (in.) | 53.125 |
| Evaporator weight (lb.) | 163 |
| Nominal sound level (dB) | 57 |
| Outdoor unit depth (in.) | 29.14 |
| Outdoor unit width (in.) | 29.14 |
| Outdoor unit height (in.) | 32.875 |
| Outdoor unit weight (lb.) | 223 |
| Refrigerant Compatibility | R-454B |
| BTU Cooling Rating (Btu/h) | 45000 Btu/h |
| Certifications and Listings | AHRI Certified,cETLus |
| Seasonal Energy Efficiency Ratio (SEER) | 15 |
| Seasonal Energy Efficiency Ratio 2 (SEER 2) | 14.3 |

## Description

The MRCOOL Signature Series 48K Heat Pump System Bundle pairs the 48K Heat Pump Condenser with the 48K Multi-Position Air Handler for high-capacity, energy-efficient year-round comfort. The condenser delivers up to 14.3 SEER2 and 11.2 EER2 efficiency and comes factory pre-charged with low-GWP R-454B refrigerant for simplified installation and compliance with environmental standards. Features include a single-speed scroll compressor, inner-groove copper tubing, intelligent defrost control, and integrated temperature and pressure monitoring for reliable operation. Operating at 65 dB with a sound-control top and protected by a steel louver coil guard and wire fan grille, it ensures quiet, durable performance. The versatile air handler supports upflow, downflow, or horizontal installation in utility rooms, closets, attics, or crawl spaces, with a galvanized steel cabinet, copper "A" coils with aluminum fins, thermal insulation, and a high-efficiency ECM blower motor for steady airflow, improved humidity control, and reduced energy loss. Optional electric heat kits provide supplemental warmth, and compatibility with most third-party smart thermostats allows precise comfort management. Backed by a 10-year limited parts warranty and limited lifetime compressor warranty, this bundle delivers reliable performance, flexible installation, and long-term durability.