MRCOOL 4 Ton 17.5 SEER2 Universal Series Heat Pump System - R454B

Overview

The MRCOOL 4 Ton Universal Series Heat Pump System delivers powerful, high-capacity comfort for larger homes and demanding climate conditions. Featuring the UHP18048-O DC inverter condenser with an impressive 17.5 SEER2 rating, this system provides superior heating and cooling performance while maintaining energy efficiency. With 48,000 BTU capacity for both cooling and heating, this robust system is ideal for spacious homes requiring reliable year-round comfort.

This high-capacity system delivers exceptional performance in extreme weather conditions, providing efficient heating down to -22°F and effective cooling up to 122°F outdoor temperatures. The advanced DC inverter technology allows the rotary compressor to continuously adjust output based on real-time demand, ensuring consistent temperatures while reducing energy consumption and system wear. Paired with the UAH18048-O multi-positional air handler—supporting vertical, horizontal, and downflow installations—this system offers maximum flexibility for various home layouts.

Backed by a 10-year parts warranty and 2-year labor warranty, this system features extended 246-foot lineset capability and compatibility with optional NO-VAC Quick Connect line sets for simplified installation. The M-shaped aluminum evaporator coil ensures optimal heat exchange and long-term durability, making this an ideal solution for homeowners seeking reliable, high-capacity climate control for larger spaces.

How is it different from a traditional heat pump?

• High-Capacity DC Inverter Technology: 48,000 BTU cooling and heating output
• Extended Lineset Capability: Supports up to 246-foot installation runs
• NO-VAC Quick Connect Compatibility: Streamlines installation, no vacuuming or flaring required
• Multi-Speed Condenser Fan: 4-speed operation for optimized performance
• Extreme Climate Performance: Efficient heating down to -22°F and cooling up to 122°F
• Compact Design: Space-saving footprint for limited outdoor areas
• High Airflow Capacity: Up to 1,601 CFM for whole-home comfort

Quick Facts

• Cooling Capacity: 48,000 BTU
• Heating Capacity: 48,000 BTU
• Refrigerant: R454B
• DC Inverter Heat Pump System for Ducted Applications
• SEER2: Up to 17.5
• HSPF2 (Region 4): 9.5
• Multi-Positional Air Handler (Vertical/Horizontal/Downflow)
• Extended Lineset: Up to 246 feet maximum length
• Extreme Temperature Operation: Heating down to -22°F, Cooling up to 122°F
• High Airflow: Up to 1,601 CFM
• Quiet Operation (Condenser: 65 dBA; Air Handler: 33.5-53 dBA)
• 4 Ton, 17.5 SEER2

Use our sizing calculator () to determine the demand for your home.

Included in Your Order:

MRCOOL 4 Ton DC Inverter Heat Pump Condenser – Model: UHP18048-O

MRCOOL 4 Ton Universal Series Air Handler – Model: UAH18048-O

NO-VAC Quick Connect Line Set (sold separately; simplifies installation)

Compatible with Standard Thermostats

Installation Manual

Owner's & Service Manuals

Key Features:

• High-Capacity DC Inverter Technology (48,000 BTU)
• 4-Speed Condenser Fan Motor for Optimized Performance
• Extended 246-foot Lineset Capability
• Extreme Climate Performance: Heating to -22°F, Cooling to 122°F
• NO-VAC Quick Connect Line Set Compatible
• Multi-Positional Air Handler (Vertical/Horizontal/Downflow)
• High Airflow Capacity (Up to 1,601 CFM)
• M-Shaped 100% Aluminum Evaporator Coil
• 4-Speed ECM Blower Motor
• Optional Universal Series Heat Kits Available (5KW-20KW)
• Compact, Space-Saving Design
• Self-Diagnostic Control Board

Technical Specifications

UHP18048-O (Condenser)

UAH18048-O (Air Handler)

Warranty Information

• 10 Years Parts Limited Warranty
• 2 Years Labor Limited Warranty

Manuals & Downloads

Please note: The air handler must be installed with a compatible condenser. Optional NO-VAC Quick Connect line set and electric heat kits (5KW-20KW) available separately.