MRCOOL® 36k DIY 5th Generation Mini-split Air Handler 230v
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Warranty Protection
Trusted Returns Policy
MODEL: DIY-36-HP-WMAH-230D25-O
Maximum Power, Whisper-Quiet Comfort for Extra-Large Spaces up to 1,500 sq. ft.
The MRCOOL® 36k BTU DIY® 5th Generation Mini-Split Air Handler is built for serious climate control, offering powerful, energy-efficient heating and cooling for extra-large areas — ideal for open-plan living rooms, expansive basements, multi-room spaces, workshops, or bonus rooms up to 1,500 sq. ft.
With its fully DIY-friendly design, this air handler pairs effortlessly with your MRCOOL® DIY® 5th Gen Multi-Zone Condenser using a pre-charged 25-foot Quick Connect® line set with eco-friendly R-454B refrigerant. No vacuum pump, no gauges, and no expensive installation team required.
Enjoy total control from anywhere via the SmartHVAC® app, Amazon Alexa, Google Assistant, and the included wireless remote. The advanced Follow Me® feature ensures your preferred temperature follows you within the space, delivering precise, personalized comfort.
Coated with a durable Gold Fin® corrosion-resistant finish and backed by an industry-leading warranty, this unit guarantees year-round, ultra-quiet operation and long-lasting reliability.
Why You’ll Love It
✅ Designed for Extra-Large Spaces — Perfect for great rooms, expansive basements, large workshops, or bonus rooms up to 1,500 sq. ft.
✅ Hassle-Free DIY Installation — Connects easily with pre-charged Quick Connect® lines and the included 25ft DIYPro™ Communication Cable. No HVAC pro needed.
✅ Smart-Home Compatible — Seamlessly control your system via the SmartHVAC® app, Alexa, or Google Assistant.
✅ Follow Me® Comfort Technology — Automatically adjusts based on your location for precise, room-to-room comfort.
✅ Ultra-Quiet Operation — Runs between 29 and 49 dBA for quiet, discreet climate control.
✅ Gold Fin® Protection — Corrosion-resistant coating ensures extended durability and system life.
✅ Year-Round High-Capacity Performance — Cools down to 5°F and heats up to 86°F, delivering reliable comfort through every season.
✅ Industry-Leading Warranty — Limited Lifetime Compressor Warranty (with registration), 7-Year Compressor, and 5-Year Parts Warranty.
What’s Included:
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MRCOOL® 36K DIY® 5th Gen Mini-Split Air Handler
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25ft DIYPro™ Communication Cable
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Wireless Remote Control
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Installation Accessories
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MRCOOL® Warranty
Specifications
Specifications at a Glance
| Attribute | Details |
|---|---|
| BTU Capacity | 36,000 BTU |
| Voltage | 208-230V |
| Coverage Area | 1,000 – 1,500 sq. ft. |
| Sound Rating (dBA) | 29 – 49 |
| Wi-Fi Compatibility | Yes (SmartHVAC App, Alexa, Google Assistant) |
| Line Set Compatibility | MRCOOL® Quick Connect® |
| Cooling Operating Range | 5°F – 122°F |
| Heating Operating Range | 5°F – 86°F |
| Air Filter | Washable, reusable |
| Warranty | Limited Lifetime Compressor (registered), 7-Year Compressor, 5-Year Parts |
Room Size & BTU Coverage Guide
Choosing the right BTU (British Thermal Unit) output ensures your space stays consistently comfortable year-round. Use this quick reference chart to match your room size with the recommended cooling and heating capacity for your MRCOOL® DIY® 5th Gen Mini-Split Air Handler.
| BTU Rating | Ideal Room Size (Approx.) |
|---|---|
| 36,000 | 1,000 – 1,500 sq. ft. — ideal for great rooms, open basements, workshops, or multi-room spaces |
Important:
Always consider ceiling height, insulation, sun exposure, number of windows, climate, and heat-generating appliances when choosing the right system.
Still unsure which size is right?
Our MRCOOL-certified experts are happy to help — message us anytime!
What You Need for a Complete System
For full heating and cooling performance, pair this indoor air handler with:
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MRCOOL® DIY® 5th Gen Multi-Zone Condenser — Transfers heat outdoors for reliable, all-season climate control.
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MRCOOL® Quick Connect® Pre-Charged Line Set — Connects to the condenser with pre-charged refrigerant for simple, clean installation.
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DIYPro™ Communication Cable (25ft included) — Provides secure, efficient connection between the air handler and condenser.
Optional Accessories:
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MRCOOL® Wall Mount Bracket
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Additional Quick Connect® Line Sets (for extended distances)
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Coupler Kits (if line set extension is needed)
This air handler is not a stand-alone unit. It requires connection to a compatible MRCOOL® DIY® 5th Generation Multi-Zone Condenser for full operation.
It is not compatible with 3rd or 4th Generation MRCOOL® systems.
Installation
Installation & Guides
Shipping & Returns
Shipping Policy
At Cool Heat Direct, we offer free curbside delivery on all MRCOOL product orders via FedEx Ground, FedEx Freight, or trusted carriers depending on order size.
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Deliveries are made to the curbside — please arrange assistance for heavy or large items, as drivers do not carry items indoors or upstairs.
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Tracking details will be sent within 3–5 business days after placing your order.
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Freight shipments are scheduled directly by the carrier using the contact information you provide at checkout.
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Please inspect your shipment upon delivery and report any visible damage on the delivery receipt.
Return Policy
We want you to love your purchase from Cool Heat Direct. If you need to return an item:
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Contact us within 30 days of delivery.
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Items must be unused, uninstalled, and in their original packaging.
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A 35% restocking fee applies to all approved returns.
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Accessories such as line sets, wall mounts, and couplers are non-returnable.
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Return shipping is the customer’s responsibility unless the item is damaged or defective on arrival.
To start a return, please email us at support@coolheatdirect.com with your order number and reason for return.
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