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HVAC Replacement Cost Calculator — Great Falls MT

HVAC replacement in Great Falls MT, Montana costs notably below the national average. Home size, system type, and ductwork condition are the biggest cost factors. Get your estimate below.

Low estimate$4,000
Average$7,400
High estimate$15,600

Home square footage

Home square footage 1800

Quality Tier

Standard materials, solid craftsmanship

Scope of Work

Labor

Labor portion of total cost 40%

HVAC Replacement Cost in Great Falls MT: 2026 Guide

Use the calculator above to get a quick estimate. The guide below explains what drives hvac replacement costs in Great Falls MT and what to expect from contractors in Great Falls MT.

Typical HVAC Replacement Costs in Great Falls MT

Project ScopeLowHigh
AC only — small home (under 1,200 sqft)$1,400$2,600
Full system — average home (1,200–2,000 sqft)$4,000$6,400
Full system — large home (2,000–3,500 sqft)$6,400$7,400
Premium system or full ductwork replacement$7,400$15,600

What Affects HVAC Replacement Costs in Great Falls MT?

Labor rates: Contractors in Great Falls MT charge $39–$78/hour for hvac replacement work — notably below the national average.

Material costs: Material prices in the Mountain region are notably below national average due to local supply, transportation costs, and market demand.

Project complexity: Site conditions, permitting requirements, and non-standard layouts can add 15–30% to total project cost.

Frequently Asked Questions

How much does HVAC replacement cost in Great Falls MT?
HVAC replacement in Great Falls MT typically costs $4,000–$15,600. Most homeowners pay around $7,400 for a complete AC + furnace system in a standard home. Heat pump systems run $4,000–$15,600 installed.
How often does HVAC need to be replaced in Great Falls MT?
HVAC systems typically last 15–25 years. Central AC units last 15–20 years, furnaces 20–30 years, and heat pumps 15–20 years. In Great Falls MT, climate stress (hot summers or cold winters) can shorten lifespan.
What size HVAC do I need in Great Falls MT?
Most homes need approximately 1 ton of AC capacity per 400–600 sqft. Your 1,800 sqft home likely needs a 3-ton unit. A load calculation (Manual J) from a licensed HVAC contractor in Great Falls MT gives the exact sizing.
Is it better to repair or replace HVAC in Great Falls MT?
If repair costs exceed 50% of replacement cost, or the unit is over 10 years old, replacement is usually better value. New systems use 30–50% less energy, which can save $4,000–$7,400 over 10 years in Great Falls MT.

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Estimated cost in Great Falls MT

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Range: $0 – $0
Materials$0
Labor$0
City multiplier0.87x

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