ZoneBtuBTU per head, per room, per orientation — not one number for the house.

Mini split installation cost in Missouri for 5 heads

A ductless mini-split installation in Missouri
$16,689
5 indoor heads · typical range $10,799 – $25,524
Typical total$3,338 per indoor head$16,689
Range you should see in bidsthree bids on the same scope normally land inside this$10,799 – $25,524
Labor portion50% of the job — this is the part that moves by state$8,345
Material portion50% — bought at national prices$8,345
Heating, Air Conditioning, and Refrigeration Mechanics and Installers pay in Missouriabout $30/hr · BLS OEWS May 2025, SOC 49-9021$62,410/yr
U.S. mean for the same tradeSOC 49-9021$64,780/yr
Versus the national priceMissouri trade pay runs −3.7% against the U.S. mean−$311

Notes

  • Where the number comes from. The national price for a ductless mini-split installation is $3,400 per indoor head — ductless mini-split pricing published for 2026, $2,200–$5,200 per indoor head installed. Labor is about 50% of that. Heating, Air Conditioning, and Refrigeration Mechanics and Installers in Missouri average $62,410 a year against a U.S. mean of $64,780 — a factor of 0.963 — so the labor half is scaled by that and the material half is not.
  • What is in the price: the outdoor unit, the indoor heads, line sets, wall penetrations, a condensate route, electrical connection, mounting and labor.
  • What is not: a new electrical circuit or panel capacity, a condensate pump where gravity will not do, decorative line-set covers, and drywall repair. These are the lines that turn a $16,689 quote into a $20,861 invoice, so ask about each one before signing.
  • Why state matters more than people expect. Materials ship at national prices; crews do not move. Missouri sits below the national mean by 3.7%, which lands on 50% of the job and moves the total by $311.
  • Use this as a bid check, not a quote. It prices an average job in an average condition. Difficult access, the state of what is being replaced, the season, and a crew booked out three months all move the real number, and none of them are in a per-unit average.

A 5-head mini-split system in Missouri

$16,689 is the typical figure, and bids on the same scope normally land between $10,799 and $25,524. That is 5 indoor heads at $3,338 each.

Why this is not the national number

The same job priced at the U.S. average comes to $17,000 — this one is $311 less.

Heating, Air Conditioning, and Refrigeration Mechanics and Installers in Missouri average $62,410 a year against a U.S. mean of $64,780, from the Bureau of Labor Statistics OEWS release for May 2025, SOC 49-9021. That is roughly $30 an hour of trade pay, a factor of 0.963.

Labour is about 50% of this job; equipment is the other 50% and it costs the same in every state. So only the labour half is scaled here.

$8,345 of labour, $8,345 of equipment.

Half of this job is labour, and that is why it varies

Mounting heads, drilling exterior walls, running and flaring line sets, pulling a vacuum and charging the system is a day or two of skilled work per head. The equipment is a national price; the hours are not.

Where a quote goes over the range

Long line runs, heads on the far side of the house from the condenser, line-set covers on a visible elevation, and a condensate pump where gravity drainage is not available. None of those are exotic, and all of them are extra.

One condenser or several

A multi-zone system shares one outdoor unit, which is tidier and usually cheaper per head. The trade-off is real: if that condenser fails, every room loses service, and multi-zone units modulate less gracefully than single-zone ones when only one head is calling.

For two rooms, two single-zone systems are frequently the better buy despite the second condenser.

Using this against a real bid

Three quotes on identical scope should cluster. One well under $10,799 usually means something was left out rather than found cheaper. One well over $25,524 is either a harder job than average or a crew that does not want the work.

Nearby sizes

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