HOT ! MRCOOL DIY® 5th Gen E Star 36,000 BTU Mini Split Air Handler 230V

High-Efficiency Indoor Comfort for Large Spaces with ENERGY STAR® Performance

The MRCOOL DIY® 5th Gen ENERGY STAR® 36,000 BTU Mini Split Air Handler is a high-capacity indoor unit built to deliver efficient, consistent heating and cooling for large spaces ranging from 1,000 to 1,500 sq. ft. Designed for homeowners who want professional-level performance without professional installation, this air handler pairs with a compatible MRCOOL DIY® 5th Gen condenser to form a complete ductless system.

With integrated smart controls, inverter-driven operation, and ENERGY STAR® certification, this unit helps reduce energy use while maintaining reliable indoor comfort year-round.

📌 This listing includes the indoor air handler only. A compatible MRCOOL DIY® 5th Gen outdoor condenser is required for system operation.

Important Notes

• Indoor air handler only — requires a compatible MRCOOL DIY® 5th Gen outdoor condenser


• DIY® QuickConnect® line set sold separately

• Designed for DIY installation when paired with compatible MRCOOL components

Key Features & Practical Benefits

Energy-Efficient Performance with R-454B Refrigerant - This 5th Gen system uses R-454B refrigerant, a lower-GWP replacement for R-410A that maintains strong heating and cooling performance while reducing environmental impact.

• ENERGY STAR® certified for improved efficiency


• Lower Global Warming Potential refrigerant


• Inverter-driven compressor support for consistent output and reduced energy consumption

Easy DIY Installation, No HVAC Technician Required - Designed to work with MRCOOL’s DIY® QuickConnect® system for simplified installation.

• Compatible with pre-charged DIY® QuickConnect® line sets (sold separately)


• No vacuum pump, refrigerant handling, or specialized tools required


• Ideal for homeowners managing their own installation

High-Capacity Heating & Cooling for Large Spaces - built to maintain comfort in open or high-demand areas.

• 36,000 BTU capacity


• Ideal for 1,000–1,500 sq. ft. rooms


• Operates on 230V power for efficient, stable performance

Smart Control Options Built In - Control your indoor climate multiple ways without additional accessories.

• SmartHVAC app (iOS & Android)


• Amazon Alexa & Google Assistant compatibility


• Wireless remote control included


• Follow Me® Mode uses the remote as a temperature sensor for more accurate comfort control

Dehumidification Mode for Improved Indoor Air Quality - Helps maintain a comfortable environment in humid conditions.

• Dry Mode reduces excess moisture


• Supports more balanced indoor humidity levels

Built for Long-Term Reliability - Designed to handle daily use in demanding environments.

• Gold Fin® condenser-ready coating for corrosion resistance


• Ultra-quiet indoor operation suitable for living areas and bedrooms


• ETL listed (Intertek 5031495) for safety and performance compliance

Industry-Leading Warranty Coverage - Backed by strong manufacturer protection.

• Limited Lifetime Warranty on select components


• 7-Year Compressor Warranty


• 5-Year Parts Warranty

Specifications

• 
  Brand: MRCOOL DIY®


• 
  Model: DIY-36-HP-WMAH-230D25-O (ENERGY STAR® version)


• 
  Capacity: 36,000 BTU


• 
  Coverage Area: 1,000–1,500 sq. ft.


• 
  Voltage: 230V


• 
  Refrigerant: R-454B


• 
  Control Options: Remote, SmartHVAC App, Alexa, Google Assistant


• 
  Modes: Heating, Cooling, Dry (Dehumidification), Follow Me®


• 
  Certification: ENERGY STAR®, ETL Listed (Intertek 5031495)

Frequently Asked Questions