HVAC in Illinois
Reach independent HVAC companies that serve Illinois. Compare quotes and hire only if it fits.
Talk to a local HVAC company in Illinois now.
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Across Illinois's roughly 5.5 million homes, the median build year is 1971. Its counties span climate zones 4A and 5A; the most common is 4A (mixed, humid). Pick your city below for local housing facts, or read on for what applies statewide to heating and cooling work.
HVAC by city in Illinois
- Addison
- Alden
- Algonquin
- Alsip
- Antioch
- Arlington Heights
- Aroma Park
- Aurora
- Barrington
- Bartlett
- Batavia
- Beaverville
- Bedford Park
- Beecher
- Bellwood
- Bensenville
- Berkeley
- Berwyn
- Big Rock
- Bloomingdale
- Blue Island
- Bolingbrook
- Bonfield
- Bourbonnais
- Braceville
- Bradley
- Braidwood
- Bridgeview
- Bristol
- Broadview
- Brookfield
- Buckingham
- Buffalo Grove
- Burbank
- Burlington
- Calumet City
- Carol Stream
- Carpentersville
- Cary
- Channahon
- Chebanse
- Chicago
- Chicago Heights
- Chicago Ridge
- Cicero
- Clarendon Hills
- Clifton
- Coal City
- Cortland
- Country Club Hills
- Crest Hill
- Creston
- Crestwood
- Crete
- Crystal Lake
- Darien
- Deerfield
- Dekalb
- Des Plaines
- Dolton
- Downers Grove
- Dundee
- Dwight
- Earlville
- Elburn
- Elgin
- Elk Grove Village
- Elmhurst
- Elmwood Park
- Elwood
- Eola
- Esmond
- Essex
- Evanston
- Evergreen Park
- Flossmoor
- Forest Park
- Fox Lake
- Fox River Grove
- Fox Valley
- Frankfort
- Franklin Park
- Gardner
- Geneva
- Genoa
- Gilberts
- Glen Ellyn
- Glencoe
- Glendale Heights
- Glenview
- Glenwood
- Golf
- Grant Park
- Grayslake
- Great Lakes
- Gurnee
- Hampshire
- Hanover Park
- Harvard
- Harvey
- Harwood Heights
- Hazel Crest
- Hebron
- Herscher
- Hickory Hills
- Highland Park
- Highwood
- Hillside
- Hinckley
- Hines
- Hinsdale
- Hoffman Estates
- Homer Glen
- Hometown
- Homewood
- Huntley
- Ingleside
- Island Lake
- Itasca
- Joliet
- Justice
- Kaneville
- Kankakee
- Kenilworth
- Kingston
- Kinsman
- Kirkland
- La Grange
- La Grange Park
- Lafox
- Lake Bluff
- Lake Forest
- Lake In The Hills
- Lake Villa
- Lake Zurich
- Lansing
- Lee
- Leland
- Lemont
- Libertyville
- Lincolnshire
- Lincolnwood
- Lisle
- Lockport
- Lombard
- Lyons
- Malta
- Manhattan
- Manteno
- Maple Park
- Marengo
- Markham
- Matteson
- Maywood
- Mazon
- Mchenry
- Medinah
- Melrose Park
- Midlothian
- Millbrook
- Millington
- Minooka
- Mokena
- Momence
- Monee
- Montgomery
- Mooseheart
- Morris
- Morton Grove
- Mount Prospect
- Mundelein
- Naperville
- New Lenox
- Newark
- Niles
- North Aurora
- North Chicago
- Northbrook
- Oak Brook
- Oak Forest
- Oak Lawn
- Oak Park
- Odell
- Olympia Fields
- Orland Park
- Oswego
- Palatine
- Palos Heights
- Palos Hills
- Palos Park
- Park Forest
- Park Ridge
- Pembroke Township
- Peotone
- Plainfield
- Plano
- Posen
- Prospect Heights
- Ransom
- Reddick
- Richmond
- Richton Park
- Ringwood
- River Forest
- River Grove
- Riverdale
- Riverside
- Robbins
- Rolling Meadows
- Romeoville
- Roselle
- Round Lake
- Russell
- Saint Anne
- Saint Charles
- Sandwich
- Schaumburg
- Schiller Park
- Serena
- Shabbona
- Sheridan
- Shorewood
- Skokie
- Somonauk
- South Elgin
- South Holland
- South Wilmington
- Spring Grove
- Steger
- Steward
- Stone Park
- Streamwood
- Sugar Grove
- Summit Argo
- Sycamore
- Techny
- Thornton
- Tinley Park
- Union
- University Park
- Vernon Hills
- Verona
- Villa Park
- Wadsworth
- Warrenville
- Wasco
- Waterman
- Wauconda
- Waukegan
- Wayne
- West Chicago
- Westchester
- Western Springs
- Westmont
- Wheaton
- Wheeling
- Willow Springs
- Willowbrook
- Wilmette
- Wilmington
- Winfield
- Winnetka
- Winthrop Harbor
- Wonder Lake
- Wood Dale
- Woodridge
- Woodstock
- Worth
- Yorkville
- Zion
What Illinois homeowners should know about HVAC
Census estimates put the median build year in Illinois at 1971; about 26% of homes were built before 1950. Many homes from this era still have their original ductwork. Leaky or undersized ducts can hold back a new system, so ask for a duct check with any replacement quote.
About 43% of Illinois's counties are in climate zone 4A (mixed, humid), based on the U.S. Department of Energy's county map. Heating carries most of the load here. If you are considering a heat pump, ask whether the model is rated for cold climates and how backup heat works. In a humid climate, ask how the system will control indoor humidity, not just temperature. Whatever the climate, ask for a room-by-room load calculation (ACCA Manual J) instead of matching the size of the old unit. Check your own county's zone, since conditions differ across the state.
About 75% of occupied homes in Illinois heat with utility gas and 19% with electricity. Many replacement quotes will involve a gas furnace or boiler; if you are thinking about switching to an electric heat pump, ask whether your electrical panel needs an upgrade.
Permits and contractor licensing in Illinois
Replacing a furnace, air conditioner or heat pump usually needs a mechanical permit and a final inspection. In Illinois, building permits are issued by cities and counties, so the rules depend on where the home is. Ask the company who pulls the permit, and keep a copy of it.
Illinois has no statewide general contractor license; IDFPR licenses roofing contractors. For other trades, ask your city or county building department which license applies, and ask the company for its license number.
Look up a license: Department of Financial and Professional Regulation
Questions to ask an HVAC company in Illinois
- Will you do a load calculation (ACCA Manual J) before recommending a size?
- What efficiency ratings (SEER2, HSPF2 or AFUE) does each option have?
- Who pulls the permit, and is the final inspection included?
- What warranty covers the equipment, and what covers your labor?
HVAC companies serving Illinois
Company profiles for Illinois are on the way. Call or send a request above and we will connect you with a company that serves your ZIP code.
HVAC in Illinois: questions
What climate zones are in Illinois?
Illinois's counties fall in IECC climate zones 4A and 5A; zone 4A (mixed, humid) is the most common, per the U.S. Department of Energy's county map.
How old are homes in Illinois?
Census estimates (ACS 2020-2024) put the median build year across Illinois at 1971, with about 64% of homes built before 1980.
Do I need a permit for heating and cooling work in Illinois?
Replacing a furnace, air conditioner or heat pump usually needs a mechanical permit and a final inspection. In Illinois, permits are issued by cities and counties, so check with the building department where the home is.
Who licenses HVAC contractors in Illinois?
Illinois has no statewide general contractor license; IDFPR licenses roofing contractors. Ask for the company's license or registration number and look it up with the Department of Financial and Professional Regulation.
How does Swupi work in Illinois?
Call or send a request with your ZIP code, and Swupi connects you with an independent HVAC company that serves your area. You agree on price and timing directly with that company.
Ready to talk to a local HVAC company in Illinois?
Homeowners pay nothing to use Swupi. We connect you with independent local pros; we are not a contractor. Calls may be recorded and connected to a service provider.
Rather not call? Send a request
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