Mini-splitBest efficiencyENERGY STAR

MRCOOL DIY 4th Gen 12K

4.6(1,510 retailer ratings) by MRCOOL · Model DIY-12-HP-WM-115C25

America's DIY mini-split — pre-charged quick-connect lines mean no vacuum pump and no HVAC tech. Heats and cools at 22 SEER2.

Cooling

12,000 BTU

Covers

500 ft²

Efficiency

22SEER2

Noise

32 dB

$1099 est.

typical street price · via Amazon

Check Price

Is 12,000 BTU right for your room? Run the sizing calculator

Strengths & trade-offs

Pros

True DIY install (no pro)
22 SEER2 — lowest running cost
WiFi + heats year-round

Cons

Needs an exterior wall + drilling
Higher up-front cost

What the MRCOOL DIY 4th Gen 12K costs to run

Estimated from this unit's 22SEER2 rating at 8 hours/day of cooling, using average residential electricity rates for each US climate zone. Your usage and utility rate will shift these numbers — run the calculator for your exact room.

Climate zone	Example regions	Est. cost / month
Cool North	Pacific NW, Upper Midwest, New England	$24 /mo
Mixed / Temperate	Mid-Atlantic, Midwest, Mountain	$25 /mo
Hot & Humid	Southeast, Gulf Coast, Texas	$21 /mo
Hot & Dry	Southwest, Desert	$22 /mo

Full specifications

Type	Mini-split air conditioner
Cooling capacity	12,000 BTU
Rated coverage	500 ft²
Efficiency	22 SEER2
Noise (low)	32 dB
Smart features	App, Voice, Scheduling
ENERGY STAR	Yes
Model number	DIY-12-HP-WM-115C25
Typical street price	$1099