MrCool Universal 3 Ton Central Ducted Multi-Position Air Handler, R454B (UAH18036-O)

MrCool Universal Series 36,000 BTU Multi-Position Air Handler Overview

Whole-Home Comfort. Flexible Installation. Future-Proof R-454B Refrigerant.

Upgrade your central HVAC with the MrCool Universal Series 36,000 BTU (3 Ton) Multi-Position Air Handler — a versatile, high-efficiency indoor unit engineered to pair with any R-454B-compatible condenser for whole-home heating and cooling. Whether you're replacing an aging system or installing new HVAC equipment, the Universal air handler delivers the flexibility, performance, and long-term durability homeowners expect from a modern central HVAC system.

Multi-Position Installation Flexibility

Supports upflow, downflow, and horizontal installations — fitting easily into attics, closets, crawlspaces, basements, or mechanical rooms. This adaptability gives your HVAC installer more placement options and makes the Universal air handler an excellent choice for both new construction and retrofit projects, including homes with unusual layouts or tight mechanical spaces.

Future-Proof R-454B Refrigerant

Built for the next generation of HVAC, this air handler is engineered for R-454B refrigerant — a low-GWP (global warming potential) option that meets the EPA's 2025 refrigerant transition requirements. Your investment is protected against future refrigerant availability issues and regulatory changes affecting older R-410A systems.

NO-VAC Quick Connect Compatible

Compatible with the optional MrCool NO-VAC Quick Connect line set (sold separately), which arrives pre-charged and sealed — eliminating the need for vacuuming, flaring, or professional refrigerant handling. This dramatically simplifies installation and reduces labor costs, making it an excellent choice for contractors focused on installation efficiency.

High-Efficiency M-Shaped Evaporator Coil

The advanced M-shaped evaporator coil maximizes surface area for superior heat exchange and airflow — improving system efficiency while keeping the unit lightweight. Constructed from 100% aluminum, the coil is corrosion-resistant and built to deliver years of reliable service with minimal maintenance.

Optional Electric Heat Kits

Supports Universal Series Electric Heat Kits (5 kW / 8 kW / 10 kW / 15 kW / 20 kW) for enhanced cold-climate performance or emergency backup heat. Compatible heat kit SKUs for this air handler: UHK05, UHK08, UHK10, UHK15, UHK20.

Whisper-Quiet Operation

Operating from 33 dB at low fan speed — quieter than a standard dishwasher or household conversation — the Universal air handler delivers powerful airflow without disrupting your home. Four variable fan speeds let your installer dial in the right balance of airflow and noise for each zone of your home.

Peace of Mind

Backed by an industry-leading warranty:

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

Features

• 36,000 BTU capacity (3 Ton) — pairs with matching Universal Series heat pump condenser
• Multi-position design — upflow, downflow, and horizontal installations
• 115/208/230V, single-phase, 60 Hz
• R-454B refrigerant — EPA 2025-compliant, low-GWP
• NO-VAC Quick Connect line set compatible (sold separately)
• M-shaped evaporator coil — 100% aluminum, corrosion-resistant
• Airflow: 971.2 – 1,236.1 CFM (4 variable fan speeds)
• Whisper-quiet operation (33 – 48 dB)
• Replaceable filter: 16 x 20 x 1
• Electronic expansion valve (EXV) metering for precise refrigerant control
• Optional electric heat kits: 5 kW / 8 kW / 10 kW / 15 kW / 20 kW
• Compact slim-profile cabinet fits tight installation spaces
• AHRI certified | ETL listed

Fast nationwide fulfillment from the USA. Free shipping on qualifying orders over $1,500. See our shipping and returns policy for full details.