DIY Mini-Splits

DIY mini-splits ship with precharged quick-connect linesets so you never open the refrigerant circuit — drill a 3.5" hole, hang the head, mount the condenser, torque the connectors, and you've skipped a $2,000-$4,000 install quote. MRCOOL effectively owns the category, with EG4 and a few others nibbling at it. The honest catches: you still need a dedicated circuit (often a 240V run an electrician should do), the quick-connect fittings cost a few SEER points against comparable pro-install units, resale-minded buyers should know HVAC pros roll their eyes at them, and warranty claims mean phone support and shipped parts, not a dispatched tech. For a garage, shop, bonus room, or rental where the install-quote math is absurd, they're the rational answer.

The catalog has 18 DIY mini-splits from 4 brands, priced from ~$820 to ~$3,469. 7 are rated to keep heating down to -13°F, the least expensive being the Klimaire DIY 12,000 BTU (19 SEER2).

Klimaire · Single-Zone DIY

~$820

Klimaire DIY 12,000 BTU (19 SEER2)

Budget-focused DIYers who want the precharged quick-connect experience without paying the MRCOOL brand premium.

BTU/h

12k

Volts

230

Refrig.

R-410A

SEER2

19

HSPF2

8.5

Heats to

-13°F

Series photo

MRCOOL · Single-Zone DIY

~$1,806

MRCOOL Easy Pro 5th Gen 18,000 BTU

A garage, workshop or mild-climate living room where the lowest price for a self-installed 18k matters more than winter output.

BTU/h

18k

Volts

230

Refrig.

R-454B

SEER2

20

HSPF2

8.5

Heats to

-13°F

Series photo

MRCOOL · Single-Zone DIY

~$2,109

MRCOOL Easy Pro 5th Gen 24,000 BTU

A large shop, addition or bonus room in a mild-winter area where a cheap self-install 2-ton is the goal.

BTU/h

24k

Volts

230

Refrig.

R-454B

SEER2

18.9

HSPF2

8.7

Heats to

-13°F

MRCOOL · Single-Zone DIY

~$2,370

MRCOOL DIY 5th Gen E Star 12,000 BTU

A 350-500 sq ft bedroom, office, or garage where only a 115V circuit is practical and you want the DIY install.

BTU/h

12k

Volts

115

Refrig.

R-454B

SEER2

23.5

HSPF2

10.2

Heats to

-13°F

MRCOOL · Single-Zone DIY

~$2,609

MRCOOL DIY 5th Gen 18,000 BTU

A 500-700 sq ft master suite, basement, or small apartment in a cold climate where the unit will carry real winter heating.

BTU/h

18k

Volts

230

Refrig.

R-454B

SEER2

22.5

HSPF2

11.5

Heats to

-13°F

MRCOOL · Single-Zone DIY

~$3,029

MRCOOL DIY 5th Gen 24,000 BTU

A 750-1,000 sq ft open living area, shop, or small home in a hot or mixed climate with 230V available.

BTU/h

24k

Volts

230

Refrig.

R-454B

SEER2

22.7

HSPF2

9.5

Heats to

-13°F

MRCOOL · Single-Zone DIY

~$3,469

MRCOOL DIY 5th Gen 36,000 BTU

Open shops, barndominiums, and great rooms of 1,000-1,500 sq ft where one head can see the whole space.

BTU/h

36k

Volts

230

Refrig.

R-454B

SEER2

18

HSPF2

8.5

Heats to

-13°F

Series photo

Perfect Aire · Single-Zone DIY

~$1,499

Perfect Aire 12,000 BTU Quick Connect DIY

Budget DIYers in mild-winter states who want the MRCOOL experience for less money.

BTU/h

12k

Volts

115

Refrig.

R-454B

SEER2

22

HSPF2

9.5

Heats to

-4°F

Series photo

Perfect Aire · Single-Zone DIY

~$1,949

Perfect Aire Quick Connect 18,000 BTU

A homeowner doing the install alone who wants cold-weather heat from one 18k head at a lower price than MRCOOL's DIY line.

BTU/h

18k

Volts

230

Refrig.

R-454B

SEER2

21

HSPF2

10

Heats to

-4°F

Series photo

Perfect Aire · Single-Zone DIY

~$2,350

Perfect Aire Quick Connect 24,000 BTU

A large open room or addition where one 2-ton head replaces a contractor install and the condenser can sit within 25 ft.

BTU/h

24k

Volts

230

Refrig.

R-454B

SEER2

22.5

HSPF2

9.5

Heats to

-4°F

EG4 · Single-Zone DIY

~$1,400

EG4 12K Hybrid Solar Mini-Split

Off-grid cabins, garages, and sunny-climate rooms where free daytime cooling justifies dedicating a few panels.

BTU/h

12k

Volts

230

Refrig.

R-32

SEER2

22

HSPF2

10.5

Heats to

5°F

MRCOOL · Single-Zone DIY

~$1,599

MRCOOL Easy Pro 5th Gen 12,000 BTU

A bedroom or office in a mild climate, with the condenser right outside the wall and no 240V circuit nearby.

BTU/h

12k

Volts

115

Refrig.

R-454B

SEER2

19.5

HSPF2

9.3

Heats to

5°F

EG4 · Single-Zone DIY

~$2,100

EG4 24K Hybrid Solar Mini-Split

Off-grid cabins, shops and sunny-climate rooms where a dedicated array can power most daytime cooling.

BTU/h

24k

Volts

230

Refrig.

R-32

SEER2

21

HSPF2

—

Heats to

5°F

Discontinued

MRCOOL · Single-Zone DIY

~$1,700

MRCOOL DIY 4th Gen 12,000 BTU

First-time DIYers conditioning a 400-500 sq ft garage, ADU, or bonus room off a standard 115V circuit.

BTU/h

12k

Volts

115

Refrig.

R-410A

SEER2

22.5

HSPF2

9

Heats to

-13°F

Discontinued

MRCOOL · Single-Zone DIY

~$2,200

MRCOOL DIY 4th Gen 18,000 BTU

A master suite, large basement, or small apartment where 12k won't keep up but a multi-zone is overkill.

BTU/h

18k

Volts

230

Refrig.

R-410A

SEER2

22.7

HSPF2

9.8

Heats to

-13°F

Discontinued

MRCOOL · Single-Zone DIY

~$2,500

MRCOOL DIY 4th Gen 24,000 BTU

A 900-1,100 sq ft shop, open-plan main floor, or small whole-home retrofit with a 230V circuit available.

BTU/h

24k

Volts

230

Refrig.

R-410A

SEER2

20.5

HSPF2

9.2

Heats to

-13°F

Discontinued

MRCOOL · Single-Zone DIY

~$2,900

MRCOOL DIY 4th Gen 36,000 BTU

Open-plan shops, barndominiums, and great rooms of 1,200-1,500 sq ft where one big head can see the whole space.

BTU/h

36k

Volts

230

Refrig.

R-410A

SEER2

18

HSPF2

—

Heats to

-13°F

Discontinued

MRCOOL · Single-Zone DIY

~$1,300

MRCOOL Easy Pro 12,000 BTU

A single bedroom or office in a mild climate where the condenser sits directly outside and budget beats efficiency.

BTU/h

12k

Volts

115

Refrig.

R-410A

SEER2

18

HSPF2

—

Heats to

5°F