24,000 BTU covers an open-plan floor, a large workshop or a small, well-insulated house from one wall unit. One head in one big room heats unevenly, so check the layout: two smaller units, or a multi-zone system, often heat a house better than one large one.
Prices were last checked October 21, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Full ranking 9
- Della Optima Pro CloudAir 24,000 BTU 230V#1 of 9Full review
The best value for heating through a cold winter, if you can pull a vacuum yourself or pay someone to. It holds its full rated heat at 5 °F for far less than a quick-connect unit that does the same.
Amazon $2,249.96 Della $2,249.96$2,249.9622,40010Flare$100 - Pioneer Quantum Hyperformance 24,000 BTU 230V#2 of 9Full review
Full rated heat in deep cold at a fair price, for a self-installer comfortable with a vacuum pump. Della’s Optima Pro has near-identical certified ratings for a little less.
Amazon $2,298 Pioneer Mini Split store $2,323$2,29822,40010Flare$103 - Perfect Aire 4th Gen Quick Connect 24,000 BTU 230V#3 of 9Full review
A quick-connect unit with one of the longest warranties for a self-install, priced below MrCool’s DIY 5th Gen. Its −4 °F heating limit rules it out as the only heat in a very cold climate.
Amazon $2,025.45$2,025.4519,8009.5Quick-connect$102 - Della Optima CloudAir 23,000 BTU 230V (24k class)#4 of 9Full review
The cheapest way into a certified, cold-capable heat pump, for a self-installer with a vacuum pump. Pioneer’s Quantum Ultra and the quick-connect Klimaire DIY have near-identical certified ratings.
Amazon $1,849.96 Della $1,849.96$1,849.9618,6009.5Flare$99 - Klimaire KIWQ-KOIQ DIY 5th Gen 24,000 BTU 230V#5 of 9Full review
The best-value quick-connect line: the same certified system as Pioneer’s Quantum Ultra, close to Della’s Optima, without the vacuum pump, for the same price or a few hundred dollars more.
Amazon $1,869$1,86918,9009.5Quick-connect$99 - Pioneer Quantum Ultra 23,000 BTU 230V (sold as 24k)#6 of 9Full review
A low price for a self-installer who owns or will rent a vacuum pump. The Klimaire DIY is the same certified system with quick-connect lines, and Della’s Optima has near-identical ratings for less.
Amazon $2,003 Pioneer Mini Split store $2,003$2,00318,9009.5Flare$106 - MrCool DIY Easy Pro 24,000 BTU 230V#7 of 9Full review
A middle step between MrCool’s Select and DIY 5th Gen: quick-connect and a fair warranty, but it loses much of its heat in a cold snap. Best for mild winters.
MRCOOL DIY Direct $2,109$2,10917,0008.7Quick-connect$124 - MrCool DIY Select 24,000 BTU 230V#8 of 9Full review
For mild climates and occasional use, where a low price for a quick-connect unit matters most. The short warranty and weak cold-weather output make it a poor main heat source.
Amazon $1,899 MRCOOL DIY Direct $1,899$1,899--Quick-connect- - MrCool DIY 5th Gen 24,000 BTU 230V#9 of 9Full review
For someone who wants a true plug-together install with no tools beyond a drill, and a warranty that survives it. Expect to pay well over the price of a flare unit with the same cold-weather output.
Amazon MRCOOL DIY Direct $3,335$3,33516,1009.5Quick-connect$207
