Can I really install this myself?

The pre-charged Quick Connect line sets and R-454B refrigerant remove the vacuum pump and brazing steps. You still need basic tools, a 220V circuit and often a permit, so many buyers hire an electrician for the hookup.

How many rooms can it cover?

Two. Each 9,000 BTU air handler is rated for a room up to about 400 sq ft, and each runs on its own schedule.

Does it heat in winter?

Yes. It is a heat pump, so it heats as well as cools, and owners report it working in sub-zero weather. It also dehumidifies in humid months.

Each air handler comes with a remote, and the system works with the MRCOOL Smart Controller app plus Amazon Alexa and Google Home.

What is the warranty?

Seven years on the compressor and five years on parts. Registration and proper installation are typically required, so check the terms before buying.

What comes in the box?

Two 9,000 BTU indoor air handlers, the 27,000 BTU outdoor condenser and remotes. Line sets and installation accessories are separate.

MRCOOL DIY 27K BTU 5th Gen 23 SEER2 Price History: Lowest $3,154.00

Q: Where is the MRCOOL DIY 27K BTU 5th Gen 23 SEER2 Dual Zone Mini Split (9K + 9K) cheapest?

At HVAC Supplies, for $3,154.00, as of our latest check.

Q: What do buyers say about the MRCOOL DIY 27K BTU 5th Gen 23 SEER2 Dual Zone Mini Split (9K + 9K)?

Rated 4.9 out of 5 from 124 ratings. Buyers like: DIY install went smoother than expected; Quieter and more efficient than old units; Saved money versus HVAC quotes.

Q: Where can I buy the MRCOOL DIY 27K BTU 5th Gen 23 SEER2 Dual Zone Mini Split (9K + 9K)?

5 stores we checked sell it, including The Home Depot, HVAC Supplies, Mrcool Diy Direct, Klondike AC, eBay.

What reviewers say

4.9 / 5124 ratings

Rated 4.9 out of 5 across 124 ratings, with buyers calling the install easier than expected and the system quiet and efficient. Several say it beat pro HVAC quotes and has run without problems for months, including in sub-zero heating.

What people mention

InstallationPraisedBuyers say the Quick Connect setup went smoother than they expected for a DIY job.
NoisePraisedOwners describe it as quieter than the units it replaced.
EfficiencyPraisedReviewers report lower running costs and strong cooling versus older equipment.
Cold-weather heatingPraisedSeveral say it handled sub-zero heating without trouble.
ReliabilityPraisedLong-term owners report it running flawlessly months after installation.

From Mrcool Diy Direct

True DIY installation with pre-charged Quick Connect line sets and R-454B refrigerant — no vacuum pump or special tools
23 SEER2 rated for high efficiency and lower utility bills
Two 9,000 BTU air handlers, each covering up to 400 sq. ft., with independent room-by-room zoning
Control via included remotes, MRCOOL Smart Controller App, or Amazon Alexa and Google Home
Heats and cools year-round with dehumidification for humid months
Gold Fin anti-corrosion coating on the outdoor condenser for durability

Guarantee: 7-Year Compressor Warranty, 5-Year Parts Warranty, and optional lifetime compressor coverage.
Shipping: Free delivery on qualifying systems; ships in 1–2 business days; contiguous 48 states, regional surcharges and exclusions may apply.
In the box: Two 9,000 BTU indoor air handlers, Outdoor condenser (27,000 BTU), Remotes

About the MRCOOL DIY 27K BTU 5th Gen 23 SEER2 Dual Zone Mini Split (9K + 9K)

The MRCOOL DIY 5th Gen Dual Zone is a ductless heat pump mini split system with an outdoor condenser rated at 27,000 BTU and two 9,000 BTU indoor air handlers. Each air handler covers up to 400 sq. ft. and runs independently, so two rooms can be heated and cooled to different temperatures. It cools in summer, heats in winter and dehumidifies in humid months.

The system is built for DIY installation. It uses pre-charged Quick Connect line sets with R-454B refrigerant, so no vacuum pump or special tools are needed. The outdoor condenser has a Gold Fin anti-corrosion coating. It is rated at 23 SEER2.

You can control it with the included remotes, the MRCOOL Smart Controller App, or voice assistants such as Amazon Alexa and Google Home. Features include Follow Me, low ambient cooling, Sleep Mode over 8 hours, Auto Restart after a power outage, filter and maintenance alerts, Mute Mode and an Emergency Cooling Mode. The system supports up to four indoor air handlers.

Total capacity: 27,000 BTU
Indoor units: 2 x 9,000 BTU air handlers
Coverage: Up to 400 sq. ft. per air handler
Efficiency: 23 SEER2
Refrigerant: R-454B, pre-charged Quick Connect line sets
System type: Ductless heat pump, dual zone
Expandability: Supports up to four indoor air handlers
Controls: Included remotes, MRCOOL Smart Controller App, Amazon Alexa, Google Home
Coating: Gold Fin anti-corrosion coating on outdoor condenser
Warranty: 7-year compressor, 5-year parts, optional lifetime compressor coverage