Heating and cooling repair, installation and maintenance for homes, apartment buildings and businesses in Chicago, IL, from a family-owned company based in Hillside.
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Local service area
Heating and cooling service for homes, multifamily properties and businesses.
Service in Chicago
SquareHVAC is based in Hillside and serves Chicago. Call to confirm service at your address.
View the complete service areaChoose a service
Choose the system or problem that best matches your property. Open a card to see what the service covers without leaving this city page.
Repair, replacement and maintenance for central and ductless cooling.
See what this coversAvailable in Chicago
Furnace and boiler repair, replacement and routine service.
See what this coversAvailable in Chicago
Heating and cooling service for air-source and geothermal systems.
See what this coversAvailable in Chicago
Duct repair, cleaning, humidity control and air-cleaning equipment.
See what this coversAvailable in Chicago
A bookable visit to inspect and maintain heating or cooling equipment.
See what this coversAvailable in Chicago
Choose your next step
Not sure if you need service now or can wait? Use these signs to choose a practical next step. Talking through what your system is doing does not commit you to an appointment.
Smell gas? Leave the building and call your gas company first. Then call us.
Emergency service is available 24/7, including Sundays.
Urgent
Call now if you see smoke, flames or signs of a fire (leave the building, stay out and call 911), water is leaking from the equipment, or the system has stopped and the quick checks below did not help.
Call (708) 673-5633Within a few days
Arrange a visit when rooms are uneven, performance has changed, or the system repeatedly needs attention.
Send a service requestNo rush
If the system still works, note changes in noise, comfort or energy use and plan the next maintenance visit.
Plan a maintenance visitSquareHVAC is based in Hillside, just west of Chicago. We repair, install and maintain heating and cooling systems for homes, apartment buildings and businesses in the city. We are a family-owned company. Serving homeowners and businesses since 2009.
We serve addresses across a large part of the city. Tell us your address when you call and we will confirm it. The communities we serve are listed on our service area page.
We repair and install air conditioners, furnaces, heat pumps, ductless mini-splits and boilers. Many buildings in the city are heated with radiators or hot-water baseboards, and a boiler heats them; our guide to hydronic heating explains how that works. We also maintain heating and cooling systems, work on water heaters and ducts, and provide duct cleaning and indoor air quality products.
We work in offices, retail shops, restaurants and apartment buildings. We service rooftop units, split systems and boilers. Our commercial page explains how to request a visit and who approves the work. If you own or manage apartments, our guide to HVAC systems in apartments explains the common system types.
Local information
About 58% of the housing units in Chicago were built before 1960, and the median home was built in 1953. Older homes more often have older ductwork, boilers or radiators, which a technician checks during the visit.
Source: US Census Bureau, ACS 5-year estimates 2020–2024 (tables B25034, B25035), via Census Reporter · Checked October 2026
Peoples Gas delivers natural gas to customers in the city of Chicago. Its home savings page lists the utility's current residential offers.
Source: Peoples Gas · Checked October 2026
ComEd delivers electricity in Chicago under the City's electricity franchise.
Source: City of Chicago, Electricity Franchise Agreement · Checked October 2026
In Chicago, repairing or replacing a furnace, boiler or air conditioner with the same kind of unit (an in-kind replacement) does not need a building permit. Ask about it when you receive your quote.
Source: City of Chicago, What types of work do not require a building permit? · Checked October 2026
What happens next
From your first call to a written quote and work you approve.
Describe the problem and give us the property address.
We inspect the equipment and explain what we find.
We explain the proposed work and cost so you can decide.
Work starts once you approve the quote.
Nearby communities
SquareHVAC also serves nearby communities. Use the full Service Areas page to check the complete list.
Next step
SquareHVAC serves Chicago and the surrounding communities with heating and cooling repair, replacement and maintenance. We inspect the equipment, explain what we find and provide a written quote with parts and labor listed separately. You decide if and when the work happens. Serving homeowners and businesses since 2009.
