Universal Series 36,000 BTU Air Handler

Sandra
Updated

UAH18036-O

DIY OPTIONAL (SEE BELOW)

Description

The MRCOOL® Universal® Series 36K Air Handler offers a high-efficiency, performance-driven solution for year-round indoor comfort. Designed to meet the needs of modern homeowners, it’s the perfect upgrade for those looking to reduce energy costs without sacrificing heating and cooling performance. Built for flexibility, the air handler features a multi-position design that allows for vertical, horizontal, or downflow installation. This makes it adaptable to a wide range of home layouts and ideal for tight or limited spaces.

Its compact footprint simplifies placement, while compatibility with the MRCOOL® NO-VAC® Quick Connect® line set (sold separately) makes installation even easier. This innovative line set comes pre-charged and sealed, eliminating the need for vacuuming, flaring, or handling refrigerant—saving both time and installation cost.

For enhanced functionality, the air handler supports optional Universal® Series Heat Kits, which can boost heating capacity during cold weather or serve as emergency backup heat during unexpected temperature drops. Inside, the system features an advanced M-shaped evaporator coil that increases the surface area for better heat exchange, improved airflow, and higher energy efficiency.

Quiet operation ensures it blends seamlessly into your home environment, producing sound levels comparable to everyday conversation or a running dishwasher. The coil is constructed from 100% aluminum for superior corrosion resistance and long-term durability.

Backed by a 10-year parts warranty and a 2-year limited labor warranty, the MRCOOL® Universal® 36K Air Handler delivers reliable performance and peace of mind.

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Key Specs

  • Brand: MRCOOL®

  • Series: Universal® R-454B

  • Model: UAH18036-O

  • System Type: Universal Series Air Handler

  • Tonnage: 3 Ton (36,000 BTU)

  • Voltage: 115 / 208 / 230V, Single Phase, 60 Hz

  • Mount Type: Multi-Position (Upflow, Downflow, Horizontal)

  • Refrigerant Type: R-454B 

  • Decibel Rating: 33–48 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: 16 x 20 x 1 in

  • Metering Device: EXV

  • Auxiliary Heater Options: 5kW, 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): 17.52" x 21.5" x 53.98"

  • Net Weight: 149 lbs

  • Gross Weight: 182 lbs

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Compatibility

Universal Series 36,000 BTU Heat Pump Inverter Condenser

Universal R-454B Heat Kits

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

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📞 (270) 366-0457
📧 support@mrcool.com
📝 Submit a support ticket

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