What is a good price per BTU for a mini split?

Practical floor

$28.75 per 1,000 BTU/h — the lowest anyone can actually pay today, on the TABU 24,000BTU Mini Split Air Conditioner wi at 24,000 BTU/h. In stock, live price, not an estimate.

Median

$132.87 per 1,000 BTU/h across 40 systems with a verified live price. Median, not average: one gouged listing moves an average far enough to contradict the table it sits above.

Cheapest single-zone

$28.75 per 1,000 BTU/h — TABU 24,000BTU Mini Split Air Conditioner wi. 31 with a live price · cheapest $28.75 per 1,000 BTU/h

Cheapest multi-zone

$61.11 per 1,000 BTU/h — HUMSURE 18000 BTU 2‑Zone Mini Split Air Conditioner. Ranked separately, never against single-zone.

In plain dollars

A price per BTU answers "is this good value"; it does not answer "what will I pay". For that, see what a mini split costs in dollars, broken down by capacity.

By brand

The same axis, one row per brand: cheapest, typical, range and who sells it — brands compared.

And the cost to run

Price per BTU is the purchase; SEER2 decides the bill afterwards. Cost to run, by system turns the rating into dollars a year and says whether a higher one pays back.

The same figures per ton

A ton is 12,000 BTU/h, which is the unit the trade quotes, so the floor is $345 per ton and the median is $1,594 per ton. Exactly the same measurement, multiplied by twelve. Equipment only: an installer's price per ton includes labour and is not comparable without adding it back.

Dollars per BTU is only a fair comparison between systems that cost the same to put on the wall. Two things break that, and both are handled by splitting the ranking rather than by averaging over the difference.

Install class

A pre-charged DIY system arrives with a sealed quick-connect line set and needs no licensed technician. A conventional system needs the line set evacuated and charged by someone with the equipment and the certification, which published guides put at roughly $1,000–$3,500 depending on the job. On a $900 unit that is not a rounding error, it is a doubling. This site therefore catalogues DIY systems only, so that the equipment price is the whole price and $/BTU means what it appears to mean.

Zone count

An 18,000 BTU three-zone system and an 18,000 BTU single-zone system show the same nameplate capacity and are not the same product. The three-zone carries three indoor heads, three line sets and a branch box, and cannot deliver its full rating to any one room. Ranking them together on $/BTU would make the multi-zone look expensive for reasons that have nothing to do with value, so each gets its own ranking and its own cheapest crown.

Efficiency

SEER2 sets what the system costs to run. Two units at an identical $/BTU can differ by a third on the power bill over a season, and the cheaper one per BTU is frequently the more expensive one to own. We show the rating the listing states and leave the trade-off visible rather than folding it into a score.

SEER against SEER2

These are different test standards, not different words for the same thing. SEER2 is measured at higher external static pressure and reads roughly 4–5% lower for identical hardware, so an older listing quoting plain SEER looks better than it is. We never convert one into the other, and a listing that states neither shows not stated.

Line set length

The sealed charge in a DIY system supports a fixed run, commonly 16 or 25 feet. If the outdoor unit has to sit further away, the install stops being DIY and the price advantage goes with it.

Electrical supply

A 115V system usually plugs into an existing circuit. A 208-230V system usually does not, and the electrician is not in the $/BTU.

Larger systems are somewhat cheaper per BTU, but the effect is weak in this catalogue (r = -0.20), not the rule of thumb the trade repeats. The clear exception is the smallest size: 9,000 BTU systems start at $64.44 per 1,000 BTU, because the compressor, inverter board and shipping crate cost much the same whatever the output. What actually moves the number is which system you pick within a size: at 24,000 BTU the range runs from $28.75 to $154.17 per 1,000 BTU, a factor of 5.4, and that gap is larger than anything between the sizes.

Oversizing is still the mistake to avoid, but for a reason that has nothing to do with price: a system with more capacity than the room needs cools the air before it has removed the humidity, then short-cycles — the room ends up cold and damp and the compressor wears out sooner. Settle the size first with the sizing calculator, then compare within it.

That is a question about history, not about today, which is why we record one. The price history page plots the measured median for every day we have observed. It currently holds 1 days. We do not forecast, and we do not back-fill.

$/1,000 BTU	Price	BTU/h	Zones	Efficiency	Volts	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$44.44	price$799.99	18,000	Single	19SEER2	208-230V	Electactic SE7203SP 18K Easy DIY All specs Volts 208-230V Line set —
per 1,000 BTU/h$45.83	price$549.98	12,000	Single	18SEER2	115V	Albott DIY 12K Pro Fast-Fit · 3rd-party All specs Volts 115V Line set —
per 1,000 BTU/h$46.67	price$559.99	12,000	Single	18SEER2	220V	Albott Easy DIY 12K 220V · 3rd-party All specs Volts 220V Line set —
per 1,000 BTU/h$47.50	price$569.99	12,000	Single	18SEER2	115V	Albott Easy DIY 12K 115V · 3rd-party All specs Volts 115V Line set —
per 1,000 BTU/h$50.00	price$599.99	12,000	Single	23SEER2	—	TURBRO 12,000 BTU Ductless Mini Split Invert · 3rd-party All specs Volts — Line set —
per 1,000 BTU/h$50.00	price$599.99	12,000	Single	18SEER2	220V	YUMPIE Easy DIY 12,000 BTU 220V · 3rd-party All specs Volts 220V Line set —
per 1,000 BTU/h$50.00	price$899.99	18,000	Single	23SEER2	—	TURBRO 18,000 BTU Ductless Mini Split Invert · 3rd-party All specs Volts — Line set —
per 1,000 BTU/h$54.17	price$649.99	12,000	Single	24SEER2	—	TURBRO 12,000 BTU Ductless Mini Split Invert · 3rd-party All specs Volts — Line set —
per 1,000 BTU/h$61.11Best two-zone	price$1,099.99	18,000	2-zone	20SEER2	208-230V	HUMSURE 18000 BTU 2‑Zone Mini Split Air Conditioner · 3rd-party All specs Volts 208-230V Line set 25 ft
per 1,000 BTU/h$64.44	price$579.99	9,000	Single	23SEER2	115V	TURBRO 9,000 BTU Ductless Mini Split 115V · 3rd-party All specs Volts 115V Line set —
per 1,000 BTU/h$71.43	price$2,499.98	35,000	Single	22SEER2	208-230V	PerfectAire Perfect Aire 35000 BTU Quick Connect… · 3rd-party All specs Volts 208-230V Line set 25 ft
per 1,000 BTU/h$73.58	price$2,649.00	36,000	Single	23SEER2	230V	Klimaire DIY 36,000 BTU 23 SEER2 Quick Conne · 3rd-party All specs Volts 230V Line set 25 ft
per 1,000 BTU/h$81.88	price$1,965.00	24,000	Single	23SEER2	230V	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	price$2,025.45	24,000	Single	17SEER2	230V	PerfectAire Perfect Aire 24,000 BTU Mini Split AC &… · 3rd-party All specs Volts 230V Line set 25 ft
per 1,000 BTU/h$99.39	price$1,789.00	18,000	Single	23SEER2	230V	Klimaire DIY 18K Quick Connect · 3rd-party All specs Volts 230V Line set 25 ft
per 1,000 BTU/h$104.14	price$3,749.00	36,000	Single	18SEER2	208-230V	MRCOOL DIY 36K 4th Gen · 3rd-party All specs Volts 208-230V Line set 25 ft
per 1,000 BTU/h$124.08	price$1,489.00	12,000	Single	23SEER2	230V	Klimaire DIY 12,000 BTU 23 SEER2 Quick Conne · 3rd-party All specs Volts 230V Line set 25 ft
per 1,000 BTU/h$125.00Best three-zone	price$4,499.99	36,000	3-zone	24SEER2	230V	Zone Air 3 Zone 36,000 BTU 12K x3 · 3rd-party All specs Volts 230V Line set —
per 1,000 BTU/h$132.42	price$1,589.00	12,000	Single	23SEER2	115V	Klimaire DIY 12,000 BTU 23 SEER2 Quick Conne · 3rd-party All specs Volts 115V Line set 25 ft
per 1,000 BTU/h$133.33	price$4,399.99	33,000	3-zone	24SEER2	230V	Zone Air 3 Zone 33,000 BTU DIY Mini Split He · 3rd-party All specs Volts 230V Line set —
per 1,000 BTU/h$136.11	price$4,899.99	36,000	3-zone	24SEER2	230V	Zone Air 3 Zone 36,000 BTU 9K+9K+18K · 3rd-party All specs Volts 230V Line set —
per 1,000 BTU/h$137.42	price$1,649.00	12,000	Single	19.5SEER2	115V	MRCOOL Easy Pro 12K 5th Gen · 3rd-party All specs Volts 115V Line set 16 ft
per 1,000 BTU/h$138.71	price$3,329.00	24,000	Single	18SEER2	230V	MRCOOL 24000 BTU 230V Ductless Inverter Mini · 3rd-party All specs Volts 230V Line set 25 ft
per 1,000 BTU/h$143.33	price$1,719.99	12,000	Single	17SEER2	115V	PerfectAire Perfect Aire 12,000 BTU Mini Split AC &… · 3rd-party All specs Volts 115V Line set —
per 1,000 BTU/h$150.00	price$1,799.99	12,000	Single	19.5SEER2	115V	MRCOOL DIY 12K 5th Gen All specs Volts 115V Line set 25 ft
per 1,000 BTU/h$154.17	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 —
per 1,000 BTU/h$155.56	price$2,799.99	18,000	Single	23.5SEER2	230V	Zone Air 18,000 BTU DIY Ductless Mini Split · 3rd-party All specs Volts 230V Line set —
per 1,000 BTU/h$155.56	price$4,199.99	27,000	2-zone	24SEER2	230V	Zone Air 2 Zone 27,000 BTU DIY Ductless Mini · 3rd-party All specs Volts 230V Line set —
per 1,000 BTU/h$161.61	price$2,909.00	18,000	Single	21SEER2	—	MRCOOL DIY 18K 5th Gen All specs Volts — Line set 25 ft
per 1,000 BTU/h$174.33	price$1,569.00	9,000	Single	17.5SEER2	115V	MRCOOL 9000 BTU Ductless Inverter Mini Split · 3rd-party All specs Volts 115V Line set —
per 1,000 BTU/h$176.19	price$3,699.99	21,000	2-zone	24SEER2	230V	Zone Air 2 Zone 21,000 BTU 12K+9K · 3rd-party All specs Volts 230V Line set —
per 1,000 BTU/h$183.33	price$2,199.99	12,000	Single	23SEER2	115V	Zone Air 12,000 BTU DIY Ductless Mini Split 115V · 3rd-party All specs Volts 115V Line set —
per 1,000 BTU/h$185.33	price$1,667.98	9,000	Single	18SEER2	115V	PerfectAire Perfect Aire 9000 BTU Quick Connect · 3rd-party All specs Volts 115V Line set —
per 1,000 BTU/h$187.50	price$2,249.99	12,000	Single	24SEER2	230V	Zone Air 12,000 BTU DIY Ductless Mini Split 230V · 3rd-party All specs Volts 230V Line set —
per 1,000 BTU/h$205.55	price$3,699.99	18,000	2-zone	24SEER2	230V	Zone Air 2 Zone 18,000 BTU 9K+9K · 3rd-party All specs Volts 230V Line set —
per 1,000 BTU/h$206.56	price$3,718.00	18,000	3-zone	23.9SEER2	240V	MRCOOL DIY Multi Zone 18K 3-Zone · 3rd-party All specs Volts 240V Line set 25 ft
per 1,000 BTU/h$233.33	price$2,099.99	9,000	Single	23SEER2	115V	Zone Air 9,000 BTU DIY Ductless Mini Split 115V · 3rd-party All specs Volts 115V Line set —
per 1,000 BTU/h$238.89	price$2,149.99	9,000	Single	24SEER2	230V	Zone Air 9,000 BTU DIY Ductless Mini Split 230V · 3rd-party All specs Volts 230V Line set —
per 1,000 BTU/h$256.56	price$2,309.00	9,000	Single	23.6SEER2	115V	MRCOOL DIY 9K 4th Gen · 3rd-party All specs Volts 115V Line set 25 ft