Heating and Cooling Service in Downers Grove, IL
New air conditioners and furnaces, repairs and maintenance in Downers Grove, IL.

Smell gas? Leave and call your gas company. See smoke or flames? Leave and call 911. Emergency service is available 24/7, including Sundays.

Local service area
Heating and cooling service in Downers Grove
New systems, repair and maintenance for heating and cooling equipment.
View the complete service areaMap of Downers Grove and Hillside
SquareHVAC installs, repairs and maintains heating and cooling systems in Downers Grove.
AC installation in Downers Grove
A new air conditioner should fit the house. One that is too large turns on and off too often and leaves the air damp. One that is too small runs all day and still does not cool. So we look at the house before we recommend a size.
See what a new air conditioner installation includes, step by step.
We can also help you identify utility or manufacturer rebates. Programs and eligibility change, so we check what applies at the time of your quote.
Furnace replacement or heat pump installation
We install new heating systems. Two guides help you choose before you spend: 80 AFUE and 96 AFUE furnaces and heat pump or gas furnace.
Repairs
- Air conditioner repair: warm air, water leaks, ice on the pipes, or a unit that will not start.
- Furnace and heating repair: no heat, weak heat, or a furnace that starts and stops.
Comparing equipment for a Downers Grove home
The decision to install a new air conditioner begins with how the current system behaves. Tell us if it cools some rooms but not others, runs for very short cycles or struggles only on hotter days. Those observations help separate an equipment-size question from an airflow or repair question. A technician still needs to examine the home and the existing system before making a recommendation.
If you are also comparing a furnace or heat pump, ask how the proposed system will serve the spaces you use and what changes to the existing setup are included. The two efficiency guides above can help you form questions before the quote. Nicor Gas lists current residential rebate offers for its Downers Grove service territory, but a program’s eligibility must be checked for the equipment being proposed. Ask about any approvals once the scope is defined, rather than assuming that a repair and a new installation follow the same process.
What a new air conditioner installation includes
- Step 1
Assessment
We look at the house, the ducts and the old system.
- Step 2
Choices and quote
We explain the choices and provide a written quote for approval before work begins.
- Step 3
Installation
We remove the old unit and install the new one.
- Step 4
Test and handover
We test the system and show you how to use it.
Local information
Local information for Downers Grove
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Downers Grove housing: 25% built before 1960. Median year built: 1974.
Source: US Census Bureau housing data, 2020–2024 · Checked October 2026
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Nicor Gas provides natural gas service in Downers Grove. Nicor Gas residential rebates lists the gas utility's current residential offers.
Source: Nicor Gas service territory · Checked October 2026
Customer review
In a customer’s words
“Sam and David very professional they install my ac system on time I recommend squarehvac to anyone need there service well done sam thank you for your service”
John Kacha ochana

Common questions about HVAC service in Downers Grove
What should I compare in a Downers Grove AC quote?
Nearby communities
Service around Downers Grove
Next step
Request service in Downers Grove
Describe the problem and provide the Downers Grove service address. We will confirm coverage and give you a written quote before approved work begins.




