Boiler Replacement Cost in Green Bay, Wisconsin
Boiler replacement in Green Bay runs about $10,300 for a typical job. Basic installs start near $6,100. High-efficiency equipment with duct or electrical work can reach $13,800.
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Green Bay Weather and HVAC Load
NOAA's 1991-2020 climate normals put Green Bay at 7,779 heating degree days and 425 cooling degree days per year. Heating is the bigger job here, and furnaces and heat pumps in Green Bay put in far more hours than the air conditioner. A normal year brings 159 nights at or below freezing and 6 days over 90°F. Snowfall averages about 56 inches. For a 2,000 sq ft house, this climate points to a heating load somewhere near 75,000 BTU/h. Treat that as a starting number. A Manual J calculation will move it up or down based on insulation and windows.
| Heating degree days / year | 7,779 |
|---|---|
| Cooling degree days / year | 425 |
| Nights at or below 32°F | 159 |
| Days above 90°F | 6 |
| Average low / high | 35.2°F / 54.3°F |
Green Bay Housing Stock
Half the homes in Green Bay were built before 1971 (Census ACS median), so the typical house is about 55 years old. A lot of these homes are on their second or third system by now. The ductwork is usually original, and leaky joints are common. Green Bay has roughly 25,000 owner-occupied homes, or 55.9% of households. Homes here have a median value of $191,500 and households a median income of $62,546. Those two numbers drive the labor adjustment in our estimate.
Between 2020 and 2025, NOAA's Storm Events Database logged 8 hail days and 21 days with damaging thunderstorm winds in Brown County. The largest hail reported was 2.5 inches across. Hail flattens the thin aluminum fins on condenser coils and cuts airflow. After a big storm, take a look at the outdoor unit; homeowners insurance often covers the damage.
When Replacement Makes Sense
- Fuel bills keep going up
- Leaks, rust, or pressure that keeps dropping
- The pilot or ignition keeps failing
- Some radiators stay cold
What Moves the Price
- Condensing or non-condensing boiler
- A new chimney liner or venting
- Pumps, zone valves and the piping around the boiler
- Fuel type: gas, oil or propane
- A combi boiler that also makes your hot water
For Green Bay we raised the national figures about 10%, based on local income, home values and climate-based equipment sizing. Get at least three written quotes; real bids can land outside this range.
What the Quote Should Cover
- Removing the old boiler
- Venting and fuel hookups
- Startup and safety tests
- Flushing and refilling the system
- The new boiler and the piping around it
Wisconsin Permits, Efficiency Rules and Rebates
Wisconsin falls in the DOE's North region. New split central air conditioners must meet at least 13.4 SEER2, and heat pumps sold anywhere in the U.S. need 14.3 SEER2 and 7.5 HSPF2. Equipment replacements in Green Bay generally need a mechanical permit, and a reputable contractor will pull it for you. Ask for their Wisconsin license or registration number and a certificate of insurance with the quote. The federal 25C tax credit ended for equipment installed after December 31, 2025, so incentives now come mostly from utilities and state programs. Check your electric and gas utility's rebate page before you pick equipment.
Before You Hire
- For a steam system, hire a contractor who works on steam regularly.
- Ask for a heat-loss calculation. A lot of old boilers are much bigger than the house needs.
- Ask your gas or oil company about rebates on condensing boilers.
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Boiler Replacement Questions from Green Bay Homeowners
How much is boiler replacement in Green Bay?
Plan on $6,100 to $13,800, with most jobs near $10,300. Equipment efficiency, house size and the condition of the ducts and wiring decide where your quote falls.
When is the best time to schedule boiler replacement in Green Bay?
Between late spring and early fall. Green Bay averages 159 freezing nights a year, and heating calls spike from November through February.
How long does a boiler last?
A cast-iron boiler can last 25 to 35 years. A modern condensing boiler usually lasts 15 to 20 with yearly service.
Can I replace a boiler with a heat pump?
Yes, with an air-to-water heat pump or a ductless system. The radiators may need upgrading, because heat pumps run cooler water than boilers.
Boiler Replacement Near Green Bay
Sources: U.S. Census Bureau ACS 5-year estimates 2019-2023 and 2024 population estimates; NOAA NCEI U.S. Climate Normals 1991-2020, station Green Bay Botanical; NOAA Storm Events Database 2020-2025, Brown County. Prices are our estimates, not contractor quotes. Updated 2026.