HVAC help in Green Bay
Green Bay sits where the Fox River empties into the bay of Green Bay, and it's the Brown County seat.
It's home to Lambeau Field and the Bay Beach Amusement Park on the east side.
Older homes may have boilers and radiators, while newer ones mostly use forced-air furnaces.
Green Bay at a glance: city in Brown County · ZIP codes: 54301–54308, 54311, 54313.
Green Bay is in Brown County, which the 2021 IECC climate-zone county list places in Climate Zone 6A. Either way, heating systems here run hard from roughly October through April.
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HVAC permits in Green Bay
Green Bay requires an HVAC permit for furnace and air-conditioning replacements, and the City inspects the work when it's finished.
An owner can pull the permit for the single-family home they live in, but work on any rental property must be done by a licensed contractor.
Source: City of Green Bay: Residential Permits. Checked November 9, 2026. Confirm current rules with the city before work starts.
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Green Bay HVAC FAQ
Do you serve all of Green Bay?
We connect homeowners across Green Bay with local HVAC contractors. Coverage depends on which contractors are available that day.
Can I get same-day furnace repair in Green Bay?
Sometimes. Same-day depends on contractor schedules, especially during cold snaps. Send a request and we'll check.
Does it matter if I use natural gas or propane?
Yes. Tell us your fuel type (natural gas, propane, oil, electric) so we can match you with a contractor who works on your system.
Who will I be talking to?
Fox Valley HVAC is a referral service. When you send a request, we connect you with an independent local HVAC contractor who serves your area. We don't do the repair work ourselves.
I smell gas. What do I do?
Leave the house right away and call 911 or your gas utility from outside. Don't use switches or phones inside. Call an HVAC pro after the utility says it's safe.