UAH18048-O
DIY OPTIONAL (SEE BELOW)
Description
The MRCOOL® Universal® Series 48K Air Handler is a high-efficiency HVAC solution engineered to deliver consistent, year-round comfort while helping homeowners cut down on energy costs. Whether you're upgrading an aging system or installing new equipment, this unit offers the ideal combination of performance, efficiency, and reliability.
Designed with installation flexibility in mind, the Universal® 48K supports multiple configurations—including vertical, horizontal, and downflow setups—making it a versatile fit for a wide range of spaces. Its compact design allows for seamless placement in tight or unconventional areas.
For added convenience, the unit is compatible with the MRCOOL® NO-VAC® Quick Connect® line set (sold separately), which arrives pre-charged to eliminate the need for vacuuming or flaring—simplifying installation and saving on labor. The system also supports Universal® Series Heat Kits, offering increased heating capability during cold weather and providing peace of mind with emergency backup heat when needed.
Inside, the air handler is equipped with an advanced M-shaped evaporator coil that maximizes surface area for heat exchange, enhances airflow, and improves overall system efficiency—all while keeping the unit lightweight. Built from 100% aluminum, the coil is corrosion-resistant, ensuring long-term durability with minimal maintenance.
Operating at quiet sound levels similar to a household conversation or dishwasher, the Universal® 48K blends comfort with discretion. Backed by a 10-year parts warranty and a 2-year limited labor warranty, this air handler is a smart investment in your home’s comfort and efficiency.
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Key Specs
Brand: MRCOOL®
Series: Universal® R-454B
System Type: Universal Series Air Handler
Tonnage: 4 Ton (48,000 BTU)
Voltage: 115 / 208 / 230V, Single Phase, 60 Hz
Mount Type: Multi-Position (Upflow, Downflow, Horizontal)
Refrigerant Type: R-454B
Decibel Rating: 33.5–53 dBA
Number of Speeds: 4
Line Set Compatibility: MRCOOL® NO-VAC® Quick Connect® line set
Liquid Line Size: 3/8 in
Suction Line Size: 3/4 in
Filter Type: Replaceable
Filter Size: 20 x 20 x 1 in
Metering Device: EXV
Auxiliary Heater Options: 8kW, 10kW, 15kW, 20kW (sold separately)
Color: Dark Grey
Certifications: UL, CSA, and ETL Listed
Warranty: 10-Year Parts and 2-Year Limited Labor Warranty
Net (W x D x H): 21.5" x 21.5" x 55.94"
Net Weight: 186.5 lbs
Gross Weight: 232.1 lbs
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Compatibility
Universal Series 48,000 BTU Heat Pump Inverter Condenser
5th Gen R-454B No Vac Line Sets 3/8" - 3/4"
This unit is designed to be installed using either a traditional flare nut configuration of refrigerant piping or the optional MRCOOL No-Vac Quick Connect R-454B Pre-Charged Line Set. If the optional No-Vac Quick Connect Line Set is used, you do not have to retain the services of a professional HVAC installer. If the traditional flare nut configuration is selected, you are required to retain services from a licensed HVAC professional. For electrical work, you should retain the services of a licensed electrician — please see the installation manual for full details.
Disclaimer:
The compatibility information provided in this article is specific to units within the same series. While additional compatibility with other series and units may exist, it is not detailed here. For further assistance or confirmation of compatibility with other systems, please contact MRCOOL support
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Warranty
The MRCOOL warranty provides comprehensive coverage for your unit.
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Quick Links
- Image 1
- Image 2
- Install Manual
- Service Manual
- Warranty Doc
- Manuel d'installation en français
- Document de garantie en français
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📞 (270) 366-0457
📧 support@mrcool.com
📝 Submit a support ticket
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