Can I really install this myself?

Yes, the pre-charged Quick Connect line set is designed for DIY installation without a vacuum pump or gauges. You still need basic tools and a 230V power source.

How cold can it heat?

MRCOOL rates the Hyper Heat model for heating down to -22°F.

What size room is it for?

It suits spaces of about 500 to 800 square feet, depending on insulation and climate.

Does it work with a ceiling cassette?

Yes, it is compatible with MRCOOL's wall-mounted air handlers and the DIY OuttaSight ceiling cassette.

What's included in the box?

The condenser, the chosen air handler, a 25-foot Quick Connect line set, the DIYPRO cable, and a remote control.

Can I control it with my phone or voice?

Yes, it works with the SmartHVAC app and with Amazon Alexa and Google Assistant.

MRCOOL DIY 18,000 BTU 21.2 SEER2 5th Gen Hyper Heat Single Zone Mini Split System

Q: Where is the MRCOOL DIY 18,000 BTU 21.2 SEER2 5th Gen Hyper Heat Single Zone Mini Split System cheapest?

At Home Outlet Direct, for $2,309.00, 21% under what the other stores charge, as of our latest check.

Q: What do buyers say about the MRCOOL DIY 18,000 BTU 21.2 SEER2 5th Gen Hyper Heat Single Zone Mini Split System?

Rated 5 out of 5 from 1 ratings.

Q: Where can I buy the MRCOOL DIY 18,000 BTU 21.2 SEER2 5th Gen Hyper Heat Single Zone Mini Split System?

14 stores we checked sell it, including Home Outlet Direct, WebstaurantStore.com, Ace Hardware, Commercial Cleaning Depot, HVACDirect.com.

Best price now

$2,309.00at Home Outlet DirectChecked 1 h ago

21% under what the other stores charge

Compared across 14 stores. Prices are checked against each store and labelled with when.

Visit Home Outlet Direct

What reviewers say

Owners like the straightforward DIY install and strong heating in cold weather. Some complain about indoor unit noise and app connectivity.

What people mention

InstallationPraisedOwners say the pre-charged Quick Connect line set makes setup doable without HVAC tools.
Cold-weather heatingPraisedReviewers report it keeps heating in subzero temperatures.
NoiseCriticisedSome find the indoor unit louder than expected, especially at high fan speeds.
App controlMixedThe SmartHVAC app works but some users find pairing and setup unreliable.
Line set lengthCriticisedThe 25-foot line set limits where the condenser can be placed.

About the MRCOOL DIY 18,000 BTU 21.2 SEER2 5th Gen Hyper Heat Single Zone Mini Split System

This is the MRCOOL DIY 5th Gen Hyper Heat single zone mini split condenser, a ductless heat pump rated at 18,000 BTU for cooling and heating. It is designed for spaces of 500 to 800 sq. ft. The Hyper Heat model keeps heating down to -22°F. It uses R-454B refrigerant and an inverter compressor.

It is built for DIY installation without professional tools or experience. The 25-foot DIY Quick Connect line set comes pre-charged, so no vacuum pump or gauges are required. The included DIYPRO cable protects against outdoor elements, animals and everyday wear. The Gold Fin condenser coating helps resist corrosion, including in coastal climates.

The condenser works with MRCOOL wall-mounted air handlers and the DIY OuttaSight Ceiling Cassette. Control options are a handheld remote, the SmartHVAC app for Apple and Android, and voice commands through Amazon Alexa and Google Assistant. Auto-Restart resumes operation after a power outage. Timer and Sleep modes are also included.

Model

DIYHH-18-HP-C-230D25-O

Series

DIY Hyper Heat (5th Gen)

Type

Single zone mini split condenser, inverter heat pump

Capacity

18,000 BTU cooling and 18,000 BTU heating (1.5 ton)

Coverage

500 to 800 sq. ft.

Efficiency

21.2 SEER2, 12.5 EER2, 11 HSPF2 (zone 4), 8.5 HSPF2 (zone 5)