Description
Solution Statement
The MRCOOL DIY® E Star™ 4th Generation 36K BTU Air Handler ONLY (SKU: DIY-36-HP-WMAH-230C25) is engineered for homeowners who want professional-grade ductless heating and cooling without the professional installation cost. The wall-mount air handler installs indoors and connects to the outdoor condenser via the pre-charged Quick Connect® line set — no vacuum pump, no refrigerant handling required. This ENERGY STAR® certified unit delivers up to 18 SEER2 cooling efficiency and 9 HSPF2 heating performance — qualifying for federal and utility energy efficiency rebates.
Technical Specifications
| Specification | Value |
|---|---|
| Model / SKU | DIY-36-HP-WMAH-230C25 |
| Cooling Capacity | 36,000 BTU/h |
| Heating Capacity | 36,000 BTU/h |
| SEER2 Rating | 18 SEER2 (ENERGY STAR® Certified) |
| HSPF2 Rating | 9 HSPF2 |
| Voltage | 230V / 60 Hz / 1-Phase |
| Refrigerant | R-410A |
| Coverage Area | Up to 1,500 sq ft |
| Weight | 80 lbs (36.3 kg) |
| Certification | ENERGY STAR® Certified, AHRI Certified |
| Installation Type | DIY Quick Connect® — No Vacuum Pump Required |
| Component Type | Air Handler ONLY |
Product Tips
- Quick Connect® Line Set Required: This Air Handler ONLY requires a MRCOOL DIY Quick Connect® pre-charged line set (sold separately). Match the line set length to your installation distance.
- ENERGY STAR® Rebates: This unit qualifies for federal tax credits and many utility rebate programs. Check the ENERGY STAR® rebate finder for your area.
- Pair with Matching Component: Indoor wall-mount air handler unit only. Requires matching condenser and line set for complete system.
- WiFi Control Included: Built-in WiFi enables control via the MRCOOL Smart HVAC app — compatible with Amazon Alexa and Google Home.
- Cold Climate Performance: Operates down to 0°F (-18°C) outdoor temperature, making it suitable for most North American climates year-round.
Frequently Asked Questions
Can I install this myself?
Yes! The MRCOOL DIY® system is specifically designed for homeowner installation. The Quick Connect® pre-charged line set eliminates the need for a vacuum pump or refrigerant handling. No HVAC license required for installation.
What room size does this cover?
The 36K BTU unit covers approximately Up to 1,500 sq ft. Actual coverage depends on insulation, ceiling height, climate zone, and sun exposure.
What refrigerant does this use?
This unit uses R-410A refrigerant. The Quick Connect® line set comes pre-charged — no additional refrigerant is needed for installation.
Does it work in cold climates?
Yes. The MRCOOL DIY® 4th Gen E Star operates in outdoor temperatures as low as 0°F (-18°C), providing reliable heating even in cold winter conditions.
What is included with this purchase?
This listing is for the Air Handler ONLY only. A complete system requires: (1) matching condenser, (2) MRCOOL DIY Quick Connect® pre-charged line set. All items are available on our site.
What are the electrical requirements?
This unit requires a dedicated 230V / 60 Hz / 1-Phase circuit. A licensed electrician should install the dedicated circuit if one is not already available.
Does it work with a smart thermostat?
The MRCOOL DIY® 4th Gen includes built-in WiFi and is controlled via the MRCOOL Smart HVAC app. It is compatible with Amazon Alexa and Google Home voice control. A traditional thermostat is not used with ductless mini-split systems.
What is the warranty?
MRCOOL DIY® 4th Gen E Star carries a 10-Year Registered Parts Warranty when registered within 30 days of installation. Unregistered units carry a 5-year parts warranty.
How do I register my warranty?
Register your MRCOOL product within 30 days of installation at the MRCOOL website to activate the full 10-year warranty. Keep your purchase receipt and installation date for your records.
What maintenance is required?
Clean or replace the washable air filter every 30-60 days. Clean the indoor coil annually. Keep the outdoor condenser free of debris. No refrigerant maintenance is needed under normal operation.
Accessory Integration
Complete your installation with these compatible accessories:
- MRCOOL DIY Quick Connect® Pre-Charged Line Set (16ft, 25ft, 35ft, or 50ft)
- MRCOOL LineGuard® Line Set Cover Kit
- MRCOOL Condenser Wall Mounting Bracket
- MRCOOL Smart Wi-Fi Mini Stat
Warranty Information
10-Year Registered Parts Warranty — Register within 30 days of installation for full coverage. 5-year warranty for unregistered units. Compressor warranty included.
Need help? Contact us at Contact Us for expert HVAC guidance.
