MRCOOL Universal Series 4 Ton Central Ducted Heat Pump System

The MRCOOL Universal Series 48,000 BTU 4 Ton Central Ducted Heat Pump System is a high-capacity, inverter-driven HVAC solution designed for efficient whole-home heating and cooling in larger residential spaces. Built with advanced DC inverter technology, R-454B refrigerant, and a flexible multi-position air handler, this system is ideal for larger homes, system replacements, and new central ducted heat pump installations.

With efficiency ratings of 17.5 SEER2, 12.0 EER2, and 9.5 HSPF2-4, the MRCOOL Universal 4 Ton system provides dependable year-round comfort while helping reduce energy usage compared to conventional single-stage HVAC equipment. It is engineered for extreme climate operation, with continuous cooling operation up to 122°F, up to 100% cooling output at 110°F, continuous heating operation as low as -22°F, and up to 100% heating output at -13°F.

Key Features

• 4 Ton / 48,000 BTU Capacity: Designed for larger homes, open floor plans, multi-level layouts, and demanding residential applications.
• 17.5 SEER2 Efficiency: High-efficiency performance helps reduce energy consumption while maintaining reliable comfort.
• R-454B Refrigerant: Uses next-generation refrigerant for strong performance with reduced environmental impact.
• DC Inverter Technology: Variable-speed operation adjusts heating and cooling output based on real-time demand.
• Extreme Climate Performance: Provides dependable heating and cooling in cold, mixed, and warm climates.
• Central Ducted Comfort: Works with ductwork to provide whole-home heating and cooling from one central system.
• Multi-Position Air Handler: Supports upflow, downflow, horizontal left, and horizontal right installation configurations.
• DIY-Friendly Line Set Option: Compatible with optional MRCOOL No-Vac® pre-charged line sets for simplified installation.
• Universal Heat Kit Compatible: Supports optional auxiliary heat kits for backup or supplemental heating.
• Certified Performance: ENERGY STAR®, ENERGY STAR Cold Climate, AHRI, NEEP, CEE, and federal tax credit eligible.

System Overview

This MRCOOL Universal split system pairs the UHP18048-O outdoor heat pump condenser with the UAH18048-O multi-position indoor air handler. Together, they create a flexible central ducted heat pump system built for efficient performance, strong airflow, quiet operation, and broad installation compatibility.

Unlike traditional single-stage HVAC systems that cycle fully on and off, the MRCOOL Universal Series uses inverter-driven technology to continuously adjust system output based on demand. This helps reduce temperature swings, improve humidity control, lower energy waste, and support quieter everyday operation.

Performance Specifications

Specification	MRCOOL Universal 4 Ton System
Outdoor Condenser Model	UHP18048-O
Indoor Air Handler Model	UAH18048-O
Cooling Capacity	48,000 BTU/h
Heating Capacity	48,000 BTU/h
SEER2	17.5
EER2	12.0
HSPF2-4	9.5
HSPF2-5	7.7
Indoor Noise Level	53 / 49 / 33 dB(A) High / Medium / Low
Outdoor Noise Level	65 dB(A)
Refrigerant	R-454B
Factory Refrigerant Charge	134.04 oz
Line Set Size	3/8" Liquid Line / 3/4" Gas Line

Electrical Specifications

Electrical Requirement	Specification
Indoor Power Supply	115 / 208 / 230V, 60Hz, 1 Phase
Outdoor Power Supply	208 / 230V, 60Hz, 1 Phase
Indoor Minimum Circuit Ampacity	14.5A / 10A
Indoor Max Fuse	15A
Outdoor Minimum Circuit Ampacity	38A
Outdoor Max Fuse	40A

Dimensions & Weight

Component	Dimensions	Net / Gross Weight
Indoor Air Handler	21.50" W x 21.50" D x 55.94" H	186.51 / 232.14 lbs
Outdoor Condenser	38.58" W x 16.34" D x 38.39" H	201.50 / 232.59 lbs

Indoor Airflow

Fan Speed	Airflow
Turbo	1,601 CFM
High	1,442 CFM
Medium	1,265 CFM
Low	1,088 CFM

DIY-Friendly No-Vac® Line Set Compatibility

The MRCOOL Universal Series offers installation flexibility that many traditional central ducted heat pump systems do not. This system can be installed using conventional HVAC methods, or it can be paired with compatible MRCOOL No-Vac® pre-charged line sets, sold separately.

When used properly, No-Vac® line sets can help simplify installation by reducing the need for traditional refrigerant line evacuation. For DIY-focused homeowners and installation professionals, this can help reduce installation time, lower labor costs, and make the Universal Series one of the most flexible central ducted heat pump systems available.

Indoor Air Handler Features

• Multi-Position Design: Supports upflow, downflow, horizontal left, and horizontal right installation configurations.
• Compact Cabinet: Designed to fit closets, attics, basements, crawl spaces, and mechanical rooms where space allows.
• M-Shaped All-Aluminum Coil: Corrosion-resistant coil design improves heat transfer and airflow efficiency.
• High Airflow Design: Helps move conditioned air efficiently through compatible duct systems.
• Multi-Voltage Capability: Indoor air handler supports 115V and 208/230V power configurations.
• Automatic Voltage Identification: Reduces manual conversion and rewiring requirements.
• Universal Heat Kit Compatible: Compatible with optional 5kW to 20kW auxiliary heat kits.
• Service-Friendly Design: Built for easier installation, maintenance, and long-term reliability.

Outdoor Condenser Features

• Inverter-Driven Compressor: Adjusts system output to match heating and cooling demand.
• Extreme Heat Cooling: Continuous operation up to 122°F, with up to 100% cooling output at 110°F.
• Extreme Cold Heating: Continuous operation down to -22°F, with up to 100% heating output at -13°F.
• Quiet Operation: Outdoor sound rating of 65 dB(A).
• R-454B Refrigerant: Factory charged with next-generation refrigerant.
• Certified Performance: AHRI data supports the listed capacity and efficiency ratings.

Ideal Applications

• Larger residential homes
• Open-concept floor plans
• Multi-level homes
• Replacement of older central HVAC systems
• New residential construction
• Cold climate and mixed climate applications
• Installations requiring flexible ducted heat pump configuration
• Homeowners wanting a central heat pump compatible with optional No-Vac® line sets

Certifications & Incentive Eligibility

Certification / Program	Status
AHRI Certified	Yes
ENERGY STAR® V6.1	Eligible
ENERGY STAR® Cold Climate	Eligible
Federal Tax Credits	Eligible
NEEP Listed	Eligible
CEE Tier 1 - North	Eligible
CEE Tier 1 - South	Eligible

Note: Rebate and tax credit eligibility may vary by location, installation details, and current program rules. Always confirm current incentive requirements before purchase or installation.

What’s Included

• MRCOOL Universal Series UHP18048-O outdoor heat pump condenser
• MRCOOL Universal Series UAH18048-O multi-position indoor air handler
• Factory refrigerant charge in outdoor condenser
• Installation documentation
• Manufacturer warranty coverage

What May Be Required

• Compatible MRCOOL No-Vac® pre-charged line set or traditional refrigerant line set
• Thermostat
• Electrical disconnect
• Electrical whip and breaker
• Surge protector
• Condensate drain materials
• Optional electric heat kit
• Professional installation supplies depending on local code requirements

Warranty Coverage

• 10-Year Parts Warranty
• 2-Year Limited Labor Warranty

The MRCOOL Universal Series 4 Ton Central Ducted Heat Pump System is a strong choice for homeowners who want efficient whole-home comfort, extreme climate performance, flexible installation options, and compatibility with optional MRCOOL No-Vac® pre-charged line sets.