St Louis, MO
HVAC Pros in St Louis, MO
We track 8 HVAC contractors in St Louis, MO. Compare credentials, reviews, and pricing before requesting quotes. Ameren Missouri rebates up to $1,800 available.
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Quick facts
- AreaSt Louis
- StateMO
- Providers8
- Climate zone4A-Mixed-Humid
- Heating degree days4,700
- Recommended systemdual fuel
Why HVAC matters in St Louis
St Louis sits in IECC climate zone 4A-Mixed-Humid with average January temperatures of 33°F and July highs around 76°F. With 1,200 cooling degree days, air conditioning is critical during summer months.
MO (St. Louis (city) County) falls in IECC 4A-Mixed-Humid. HDD 4700 / CDD 1200 per NOAA 1991–2020 state averages drive a dual fuel HVAC strategy. Climate data is zone-level; consult a contractor for site-specific load calcs.
Dual-fuel system recommended for St Louis
A dual-fuel system pairs a heat pump with a gas furnace backup — the heat pump runs efficiently on mild days while the furnace handles deep cold.
With 4,700 heating degree days and winter lows reaching 33°F, standard heat pumps lose efficiency. The dual-fuel approach gives you heat pump savings on 80% of winter days plus reliable gas heat when temperatures drop below 15-20°F.
About St Louis HVAC
8 HVAC providers list active service in St Louis — a small but workable shortlist. Getting three quotes is realistic if you plan a week out. Homeowners in St Louis typically schedule maintenance in spring and fall to get ahead of peak-season wait times.
St Louis's winter design temps (January averages near 33°F) sit at the edge of standard heat-pump efficiency, which is why dual-fuel setups — heat pump plus gas furnace backup — have become the contractor-preferred configuration here. Properly sized equipment matched to St Louis's load profile runs quieter, lasts longer, and avoids the short-cycling that kills cheap installs. Ameren Missouri's Ameren Missouri Heat Pump Rebate currently offers up to $1,800 toward a qualifying system, which meaningfully shifts the cost-of-ownership math.
Top local providers
Request quotes →- installationrepairemergency
What customers say “Kevin came out first to help with the home humidifier and the furnace He was very knowledgeable and answered all my…”
- Seliga Heating and CoolingTop rated
What customers say “I currently have Home Warranty and they sent a tech (not Seliga) out to check on my furnace. I was getting heat…”
- Rhymes Heating & CoolingTop rated
What customers say “Everyone at Rhymes HVAC was wonderful. Steve the salesperson knew his products very well. We initially decided to go…”
What customers say “I had a heating system problem. The tech came over on Friday to fix it. He said it would be warm in a few hours. I've…”
What customers say “⭐️⭐️⭐️⭐️⭐️ If I could give 10 stars, I absolutely would. Last night our furnace went out unexpectedly, and with three…”
- Vogel Heating & CoolingTop rated
What customers say “We called Vogel for a squealing AC. Clay met us at our house that afternoon! He was very personable and professional.…”
- SmartHouse Heating and CoolingTop rated
What customers say “I had paper wasps set up a nest right behind the exhaust vent cover for my basement furnace. I called my Pest Control…”
- Matheny Heating & CoolingTop rated
What customers say “Outstanding Work by Jacob and the Matheny Heating & Cooling Team! I couldn’t be happier with the job Jacob and his…”
What St Louis homeowners say
“Everyone at Rhymes HVAC was wonderful. Steve the salesperson knew his products very well. We initially decided to go with a competitor, and a completely different kind of system, but came back to Rhymes after that failed spectacularly. Because Rhymes…”
“Kevin came out first to help with the home humidifier and the furnace He was very knowledgeable and answered all my questions. Then the project manager, Brad came out the same day to quote me on a new furnace & AC. The water heater was free due to th…”
“I had paper wasps set up a nest right behind the exhaust vent cover for my basement furnace. I called my Pest Control company and had them render the nest and wasps defunct. Then I called my regular HVAC provider, requesting they remove the now dead/…”
Local pricing snapshot
Repairs typically run $150–$600. Full system replacements range from $4k for a basic furnace to $12k+ for a premium heat pump. Dual-fuel systems (heat pump + gas backup) are recommended for this area's cold winters.
Available rebates in St Louis
- Ameren Missouri: Ameren Missouri Heat Pump Rebate — $400–$1,800 for heat pump
- Ameren Missouri: Ameren MO Smart Thermostat Rebate — $50–$100 for thermostat
- Spire Missouri: Spire MO High-Efficiency Gas Furnace Rebate — $150–$400 for furnace
Federal tax credits (up to $2,000 for heat pumps) can stack with utility rebates. See full cost breakdown →
Nearby service areas
Missouri hub →Explore more Missouri markets from the state hub.
Popular comparisons in St Louis
- Anton's Plumbing, Heating/Cooling & Energy Experts vs Seliga Heating and Cooling4.9★ vs 5.0★
- Anton's Plumbing, Heating/Cooling & Energy Experts vs Rhymes Heating & Cooling4.9★ vs 4.9★
- Seliga Heating and Cooling vs Rhymes Heating & Cooling5.0★ vs 4.9★
- Seliga Heating and Cooling vs Design Aire Heating & Cooling - St. Louis5.0★ vs 5.0★
- Rhymes Heating & Cooling vs Design Aire Heating & Cooling - St. Louis4.9★ vs 5.0★
- Rhymes Heating & Cooling vs Thomas Hoffmann Air Conditioning & Heating LLC4.9★ vs 4.9★
Related research
Frequently Asked Questions
What's the best heating system for St Louis?
St Louis has cold winters (avg January: 33°F) with 4,700 heating degree days. A dual-fuel system (heat pump + gas furnace backup) is recommended — the heat pump handles mild days efficiently while the furnace takes over during deep cold snaps below 15-20°F.
How important is air conditioning in St Louis?
Very. With 1200 cooling degree days and summer highs regularly exceeding 76°F, AC is essential in St Louis. Central AC or a heat pump (which provides both heating and cooling) is strongly recommended. Budget $3,500-$7,000 for a quality cooling system installation.
What HVAC rebates are available in St Louis?
St Louis homeowners can stack multiple incentives: Ameren Missouri offers up to $1,800 for heat pump installations. Add the federal 25C tax credit ($2,000), and total savings can reach $3,800+. Ask your installer to itemize which rebates apply to your specific project.
How much does HVAC work cost in St Louis?
In St Louis, typical costs range from $150-$600 for repairs, $4,000-$8,000 for a standard furnace or AC replacement, and $6,000-$14,000 for a heat pump system. After available rebates, heat pump installations often net out to $4,000-$9,000. Get 2-3 written quotes to compare — prices vary significantly between contractors.
How do I verify a HVAC contractor is licensed in Missouri?
Missouri does not issue a statewide HVAC contractor license. Each municipality licenses the mechanical trade — Kansas City (MO) requires a Mechanical Contractor license through the City Planning & Development Department, St. Louis City and St. Louis County each have their own mechanical licensing, and Springfield, Columbia, and Independence each maintain local registrations. Always verify the active city license, current general-liability insurance, and any municipal bond. File complaints with the Missouri Attorney General Consumer Protection Division.
Licensing verified weekly. Reviews refreshed within the last 30 days.
Licensing data: Municipal licensing — no statewide Missouri HVAC license (each city regulates mechanical trades independently) · Company data: verified business records + Google Business profile
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