How to choose an HVAC contractor in the Metro East (2026)

The short answer

Pick a company that pulls the right local permits, uses EPA-certified technicians, gives you a written contract, and knows how to get Ameren Illinois instant discounts. Get two or three written quotes with model numbers before you decide. Skip anyone who promises the federal tax credit on a 2026 install: it ended.

1. Know which credentials actually exist

Illinois does not issue a statewide HVAC contractor license. Licensing and mechanical permits are set by each city or village, so call your town's building department (Belleville, O'Fallon, Edwardsville and so on) and ask what an HVAC contractor needs to pull a permit. What is required everywhere: technicians who handle refrigerant must hold federal EPA Section 608 certification. Ask for it.

2. Get it in writing

For work over $1,000, the Illinois Home Repair and Remodeling Act requires a written contract listing the total cost, parts and materials, and the contractor's business name and address. The contractor must also give you the “Home Repair: Know Your Consumer Rights” pamphlet and carry liability insurance. Ask for proof of insurance before work starts.

3. Ask about Ameren Illinois instant discounts

If Ameren Illinois delivers your electricity, qualifying equipment comes with an instant discount taken off the price when your contractor buys from a participating distributor. As of November 2026, Ameren lists:

• $900 for a ducted air-source heat pump (15.2 SEER2 and 8.1 HSPF2 or better)
• $630 for a ductless mini-split heat pump (16 SEER2 and 8.55 HSPF2 or better)
• $115 for an ENERGY STAR smart thermostat
• $1,350 to $5,400 for a ground-source (geothermal) heat pump

Ask each contractor whether the discount is already on the quote. Ameren also keeps a list of Instant Incentives Program Ally contractors. Details: Ameren Illinois HVAC and water heating discounts.

4. Don't count on the federal tax credit

The federal Energy Efficient Home Improvement Credit (section 25C), which paid up to $2,000 a year for heat pumps, only covers improvements made through December 31, 2025 (IRS). A 2026 installation does not qualify, so a quote that subtracts it is wrong.

5. Compare quotes like for like

• Same equipment type and size, with brand and model numbers written down.
• Efficiency ratings (SEER2 for cooling, HSPF2 for heat pumps, AFUE for gas furnaces).
• What is included: permit, removal of the old unit, thermostat, ductwork changes.
• Labor warranty in writing, separate from the manufacturer's parts warranty.

Local HVAC companies in this directory

BEL-O Cooling & Heating and BELOMAN (both family-owned in Belleville since 1959), Ehret (Belleville, since 1903), C&K Heating & Cooling (Belleville, since 1992), Archway and Heritage (O'Fallon), Classic Aire Care (Fairview Heights) and Bickle (Edwardsville). See the full HVAC list.

Questions

Sources

• Ameren Illinois: HVAC and water heating discounts
• IRS: Energy Efficient Home Improvement Credit
• US EPA: Section 608 technician certification
• Illinois Home Repair and Remodeling Act (815 ILCS 513)