The MRCOOL DIY 5th Gen Hyper Heat 18,000 BTU ceiling cassette mini split is a 208/230V ductless heat pump rated at 21.2 SEER, sized for spaces of 500–800 sq. ft., and installs with a pre-charged 25-ft. DIY QuickConnect line set that needs no vacuuming.
Highlights
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True DIY installation — no special tools, HVAC license, or professional installer required.
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25-ft. DIY QuickConnect line set, pre-charged with R-454B refrigerant, so there's no vacuuming step.
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DIYPRO cable replaces electrical conduit, adding protection against weather, animals, and everyday wear.
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OuttaSight ceiling cassette fits between standard 16" ceiling joists (including pre-manufactured I-joists) for a flush, low-profile look, with an Elevation function that lowers the filter panel for easy cleaning.
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Flexible controls — included remote, the SmartHVAC app (Apple and Android), or voice commands via Amazon Alexa and Google Assistant.
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Auto-Restart, Timer, and Sleep modes, plus a Gold Fin condenser coating that resists corrosion.
Specs & Features
| Capacity |
18,000 BTU cooling / heating (Hyper Heat) |
| Efficiency |
21.2 SEER |
| Voltage |
208/230V |
| Coverage Area |
500–800 sq. ft. |
| Indoor Unit Type |
OuttaSight ceiling cassette air handler, fits 16" joist spacing |
| Line Set |
25 ft., DIY QuickConnect, pre-charged with R-454B refrigerant |
| Warranty |
7-year compressor, 5-year parts (with online registration); MRCOOL Care Program enrollment adds a limited lifetime replacement benefit and annual care kit |
- Advanced filtration for improved indoor air quality.
- Remote control included.
Details
Avermont Direct is an authorized MRCOOL dealer. This DIY 18,000 BTU Hyper Heat single-zone system pairs the outdoor condenser with an OuttaSight ceiling cassette air handler, letting a homeowner heat and cool a space up to 800 sq. ft. without hiring an HVAC professional. It carries a 7-year compressor and 5-year parts warranty with online registration, and suits a room or open living area that calls for a discreet, in-ceiling indoor unit rather than a wall-mounted one.
Need Help?
If you have questions about this product before you order, our team is happy to help.
Email: support@avermontdirect.com
Phone: +1 (844) 455-3695
Hours: Monday–Friday, 9AM–5PM
Live Chat: Available 24/7
