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HVAC Replacement Cost in Wisconsin (2026)

HVAC replacement in Wisconsin typically runs $8,400–$19,000 for a complete 3-ton system replacement, with natural-gas furnaces with central AC as the dominant heating choice and roughly 7,300 heating degree days against 800 cooling degree days driving the seasonal load mix. Milwaukee, Madison, and Green Bay's pre-1940 housing stock includes large numbers of gravity-warm-air furnaces with massive ductwork still in service — full heat-pump retrofits often require complete duct redesign for the smaller-tonnage HP airflow patterns, while rural Northern WI's 8,500+ HDD pushes propane or natural-gas backup on every cold-climate HP install.

State Wisconsin
Cities Covered 20
Typical complete 3-ton system replacement $8,400 – $19,000
BLS HVAC mechanic wage $30.18/hr

Wisconsin climate & load drivers

  • IECC climate zone: 5A-6A-7
  • Annual load split: Heating-dominant — annual heating load exceeds cooling load (7,300 HDD / 800 CDD)
  • Dominant heating fuel: Natural gas — piped utility supply through state pipeline network
  • Dominant cooling system: Central air conditioning paired with separate heating equipment

Wisconsin licensing & permits

  • License status: Statewide license required
  • License board: Wisconsin Department of Safety & Professional Services — HVAC credential under SPS 305 (official site)
  • Permit: state HVAC permit required statewide

How HVAC replacement costs vary in Wisconsin

State-specific code or insurance rule: Wisconsin Administrative Code SPS 305 issues HVAC credential tiers (Master, Journey, and Apprentice) under the state Department of Safety & Professional Services — a uniquely combined Plumbing/HVAC regulatory body — and Focus on Energy provides cash incentives of $400-$1,200 per ton for heat-pump installations through every WE Energies, Alliant, and Madison Gas & Electric customer.

Cities in Wisconsin

Compare HVAC replacement pricing for 20 cities across Wisconsin.

Appleton, WI

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Beloit, WI

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Brookfield, WI

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Eau Claire, WI

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Fond Du Lac, WI

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Green Bay, WI

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Greenfield, WI

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Janesville, WI

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Kenosha, WI

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La Crosse, WI

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Madison, WI

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Milwaukee, WI

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New Berlin, WI

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Oshkosh, WI

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Racine, WI

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Sheboygan, WI

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Waukesha, WI

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Wausau, WI

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Wauwatosa, WI

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West Allis, WI

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More state guides

Pricing ranges reflect Wisconsin market labor (BLS OEWS HVAC mechanic mean $30.18/hr) and Woogoro regional cost modeling. For the most localized estimate, see your nearest city page above.