Mr. Cool DIY-36-HP-MUAH-230D25-O 36,000 BTU Hybrid Multi-Position Air Handler Indoor Unit - R454B

MRCOOL® DIY-36-HP-MUAH-230D25-O DIY® 5th Gen Hybrid 36,000 BTU 230V – R-454B Ducted Air Handler

The MRCOOL® DIY-36-HP-MUAH-230D25-O DIY® 5th Gen Hybrid Air Handler is a versatile 36,000 BTU ducted air handler designed to bring the convenience of MRCOOL's DIY® technology to homes with existing ductwork. Ideal for spaces up to approximately 1,500 sq. ft. , this hybrid air handler pairs with compatible MRCOOL® DIY® 5th Generation single-zone and multi-zone condensers , allowing homeowners to enjoy efficient central-style comfort while maintaining the simplicity of DIY installation. Built for compatibility with environmentally friendly R-454B refrigerant , the system delivers dependable heating and cooling performance while reducing environmental impact.

Constructed with a durable painted galvanized steel cabinet , the Hybrid Air Handler is engineered for long-lasting reliability and flexible installation. It supports upflow, downflow, horizontal left, and horizontal right installation configurations, making it suitable for closets, basements, attics, crawl spaces, and utility rooms. An integrated self-diagnostics control panel quickly displays error codes to simplify troubleshooting and maintenance. Optional electric heat kits are also available to provide auxiliary and emergency heat during colder weather.

Designed for seamless integration with the MRCOOL® DIY® ecosystem, the air handler connects to compatible DIY® condensers using pre-charged Quick Connect® line sets (sold separately), eliminating the need for vacuum pumps or refrigerant charging during installation. When paired with a compatible outdoor unit, homeowners can enjoy smart comfort features including built-in Wi-Fi , remote control through the MRCOOL® SmartHVAC App , and compatibility with Amazon Alexa and Google Assistant for convenient voice control.

General Information

System Type: Ducted hybrid air handler (indoor unit only)
Model: DIY-36-HP-MUAH-230D25-O
Series: MRCOOL® DIY® 5th Generation Hybrid
Capacity: 36,000 BTU (3 Ton)
Coverage Area: Up to ~1,500 sq. ft. (when paired with a compatible condenser)
Application: Existing or new ducted HVAC systems
Installation Configurations: Upflow, Downflow, Horizontal Left, Horizontal Right
Refrigerant Compatibility: R-454B
Voltage: 208/230V, 1 Phase, 60Hz

Key Features

• 36,000 BTU (3 Ton) ducted hybrid air handler

• Designed for homes with existing ductwork

• Compatible with MRCOOL® DIY® 5th Gen single-zone condensers

• Compatible with MRCOOL® DIY® 5th Gen multi-zone condensers

• Supports DIY installation with compatible Quick Connect® line sets

• Durable painted galvanized steel cabinet

• Upflow, downflow, horizontal left, and horizontal right installation

• High-efficiency ECM blower motor

• Integrated self-diagnostics control panel with error code display

• Compatible with environmentally friendly R-454B refrigerant

• Optional electric heat kit compatibility for auxiliary and emergency heat

• Designed for spaces up to approximately 1,500 sq. ft.

• Compatible with MRCOOL® SmartHVAC app features when paired with a compatible condenser

• Voice control compatibility through Amazon Alexa and Google Assistant when paired with a compatible condenser

• Quiet operation for enhanced indoor comfort

Specifications (Rated Conditions)

Cooling Capacity: 36,000 BTU (when paired with a compatible condenser)
Heating Capacity: 36,000 BTU (when paired with a compatible condenser)
Coverage Area: Up to ~1,500 sq. ft.
Voltage: 208/230V, 1 Phase, 60Hz
Refrigerant: R-454B
Installation: Upflow, Downflow, Horizontal Left, Horizontal Right

Included Components

• MRCOOL® DIY® 5th Gen 36,000 BTU Hybrid Air Handler

• Installation documentation

Compatible outdoor condenser, pre-charged Quick Connect® line set, thermostat, and optional electric heat kit sold separately.

Ideal For

Homeowners looking to upgrade or replace a traditional ducted air handler while taking advantage of MRCOOL®'s DIY installation technology. The DIY-36-HP-MUAH-230D25-O is an excellent solution for homes with existing ductwork seeking energy-efficient heating and cooling, flexible installation options, and compatibility with the MRCOOL® DIY® 5th Generation product lineup.