Heating and Cooling Service in Naperville, IL

SquareHVAC repairs, installs and maintains heating and cooling systems in Naperville, and repairs and installs ductwork.

Air conditioner repair in Naperville

Call us when the air conditioner blows warm air, leaks water, freezes up, makes a new noise or will not start. We repair air conditioners of all major brands.

Furnace and heating repair

Call us when the furnace gives no heat, starts and stops, or smells or sounds different. We repair furnaces and other heating systems and service boilers and heat pumps.

New systems and maintenance

• Air conditioner installation and replacement
• New heating systems
• Air conditioner maintenance

Other services, such as water heaters, ductless mini-splits, thermostats and indoor air quality, are on our services page.

Duct installation and repair

Ducts carry the warm or cool air to each room. We repair and seal ducts, replace damaged sections and install new duct runs when a room is added or changed.

Duct cleaning in Naperville

If dust collects around vents or airflow seems weak, the cause may be a dirty filter, a duct problem or something else in the system. We check the cause before recommending work. See what our duct cleaning service covers, including its dryer-vent section.

What to note about the Naperville ductwork

If one room never reaches the temperature set on the thermostat, compare its airflow with nearby rooms and check whether a supply or return grille is blocked. A loose connection, restricted filter, equipment problem or duct layout can produce similar symptoms, so a visible layer of dust alone does not establish that cleaning is the answer. If the concern began after a room addition or renovation, mention what changed and whether the old duct run was extended.

Before approving new HVAC equipment, ask how the quote treats existing ducts and whether a new run or damaged section is included. Naperville’s electric utility is City-owned, while natural gas service is provided by Nicor; any current offers need to be checked against the equipment and address at the time of the quote. The City’s permit guide also distinguishes a new installation from an in-kind replacement. Those details are more useful for this decision than assuming every equipment change follows the same path.