Cheapest 24,000 BTU mini split per BTU

5 with a live price · cheapest $28.75 per 1,000 BTU/h

24,000 BTU/h suits roughly 1,000-1,400 sq ft under the common 20 BTU per square foot rule of thumb — typically a small whole apartment, a large open-plan floor, or a commercial back room. Prices retrieved: September 7, 2026, 20:37 UTC.

24,000 BTU systems ranked by $/BTU

Show

$/1,000 BTU	Price	BTU/h	Zones	Efficiency	Volts	Line set	System
per 1,000 BTU/h$28.75Best single-zone	price$689.99	24,000	Single	21SEER2	220-230V	—	TABU 24,000BTU Mini Split Air Conditioner wi · 3rd-party All specs Volts 220-230V Line set —
per 1,000 BTU/h$81.88×2.85	price$1,965.00	24,000	Single	23SEER2	230V	25 ft	Klimaire DIY 24,000 BTU 23 SEER2 Quick Conne · 3rd-party All specs Volts 230V Line set 25 ft
per 1,000 BTU/h$84.39×2.94	price$2,025.45	24,000	Single	17SEER2	230V	25 ft	PerfectAire Perfect Aire 24,000 BTU Mini Split AC &… · 3rd-party All specs Volts 230V Line set 25 ft
per 1,000 BTU/h$138.71×4.82	price$3,329.00	24,000	Single	18SEER2	230V	25 ft	MRCOOL 24000 BTU 230V Ductless Inverter Mini · 3rd-party All specs Volts 230V Line set 25 ft
per 1,000 BTU/h$154.17Best two-zone	price$3,699.99	24,000	2-zone	24SEER2	230V	—	Zone Air 2 Zone 24,000 BTU 12K+12K · 3rd-party All specs Volts 230V Line set —

×N is how many times the cheapest in-stock system of this size and class the row costs per BTU. The crowned row is the baseline.

What to know at this size

Two tons is where the DIY line-set length starts to matter. Pre-charged systems ship with a fixed run - commonly 16 or 25 feet - and the further the outdoor unit sits from the head, the more likely you are outside what the sealed charge supports. A cheap $/BTU stops being cheap the moment it needs a technician to add refrigerant.

Power supply

208-230V and a dedicated circuit, in practice always.

The rule of thumb is a starting point, not a load calculation

Square footage alone ignores ceiling height, insulation, window area and orientation, climate zone, and how many people are in the room. Twenty BTU per square foot is a sanity check, not an answer: a sunny top-floor room with single glazing can need half again as much as the same floor area in a shaded, well-insulated basement. Our sizing calculator applies the same rule of thumb with the adjustments spelled out, and a proper Manual J calculation beats both.

How this ranking is built

Every row is a system whose price was confirmed live on the last run. Anything flagged as an estimate, or whose listing failed verification, is excluded from this table entirely rather than shown with a caveat. The BEST mark goes to the lowest $/BTU that is actually in stock, within one install class and one zone count — where more than one class is present the badge names which one it won. See what counts as a good price per BTU.