Best HVAC Companies in St. Louis (2026)

By Alex Wolk, founder of Insite Advice · Last reviewed: November 11, 2026

Short answer: The best HVAC company in St. Louis for most homeowners in 2026 is Design Aire Heating & Cooling — family-owned since 1904, rated 4.9 stars from 2,796 Google reviews, with three metro offices and published maintenance plans. If the highest rating is what matters most, look at Seliga Heating & Cooling: it’s the only company on this list with a perfect 5.0-star Google rating, from 1,889 reviews.

Every company below has a real address in the St. Louis metro, and every rating, review count, phone number and address on this page was checked against the company’s Google listing and its own website in November 2026. National call-center brands with nothing but a St. Louis landing page were left out, and no company paid to be on this list.

St. Louis HVAC companies at a glance

1. Design Aire Heating & Cooling

Frank “Pappy” Fischer started Design Aire in 1904 as a hot water and steam heating company working out of his South St. Louis home. Today it’s run by the Goldkamp family, and the company says it has installed or serviced heating and cooling for more than 100,000 homes across St. Louis, St. Charles and the surrounding area. Its technicians average more than 26 years of experience and are background-checked and drug-tested, according to the company.

Design Aire services furnaces, air conditioners, boilers, heat pumps, ductless mini-splits and geothermal systems, and offers planned maintenance agreements. It runs three offices: Maryland Heights, Hampton Avenue in South City, and O’Fallon.

Address: 2550 Harley Dr, Maryland Heights, MO 63043 (also 5804 Hampton Ave, St. Louis, and 103 Church St, O’Fallon)
Phone: (314) 897-4305
Website: designaire.net
Google rating: 4.9★ from 2,796 Google reviews, checked November 2026
Best for: Homeowners who want a four-generation family company with service plans

2. Seliga Heating & Cooling

A fourth-generation family business serving St. Louis since 1927, Seliga handles residential and commercial sales, service and installation. What sets it apart is under its own roof: an in-house sheet metal shop that fabricates custom ductwork, which matters in older St. Louis homes where standard duct sizes don’t fit. Seliga also runs a Priority Club maintenance program.

Seliga is the highest-rated company on this list — the only 5.0-star rating here, from 1,889 Google reviews.

Address: 6211 Gravois Ave, St. Louis, MO 63116
Phone: (314) 481-7333
Website: seligaheatingandcooling.com
Google rating: 5.0★ from 1,889 Google reviews, checked November 2026
Best for: Custom ductwork, older homes, and anyone who shops by rating first

3. Hoffmann Brothers

Robert Hoffmann, a former mechanical engineer at Anheuser-Busch, founded Hoffmann Brothers in 1988 with four employees. His sons Chris and Joe run it today. It’s the largest operation on this list by review volume — 12,135 Google reviews — and covers HVAC, plumbing, electrical and appliance repair from its Brentwood headquarters, with additional metro offices and a Nashville operation.

If you want one company to call for the furnace, the water heater and the panel, this is the broadest offering in St. Louis.

Address: 1025 Hanley Industrial Ct, Brentwood, MO 63144
Phone: (314) 347-1403
Website: hoffmannbros.com
Google rating: 4.9★ from 12,135 Google reviews, checked November 2026
Best for: One company for HVAC, plumbing, electrical and appliances

4. Jerry Kelly Heating, Air Conditioning, Plumbing & Electrical

Jerry and Janet Kelly opened the company in 1977 in St. Charles’s Frenchtown district. It now offers heating, cooling, plumbing, drain and electrical service from St. Charles, with NATE-certified technicians. Its 7,448 Google reviews are the second-highest count on this list, and its 4.9-star rating has held at real volume.

Address: 500 Fountain Lakes Blvd, St Charles, MO 63301
Phone: (636) 757-8506
Website: jerrykelly.com
Google rating: 4.9★ from 7,448 Google reviews, checked November 2026
Best for: St. Charles County homeowners who want one multi-trade company

5. Classic Aire Care

Family-owned since 1926, Classic Aire Care has grown into one of the metro’s biggest residential service fleets — more than 100 trucks and seven offices — partly by acquiring long-standing local names, including Ryan Heating and, in October 2026, Harster Heating. It covers heating, cooling, plumbing, electrical, indoor air quality and drain work, promotes same-day service, and sells maintenance plans.

Address: 1276 N Warson Rd, St. Louis, MO 63132 (Olivette)
Phone: (314) 988-2501
Website: classicairecare.com
Google rating: 4.9★ from 5,621 Google reviews, checked November 2026
Best for: Same-day service and maintenance plans, anywhere in the metro

6. Anton’s Plumbing, Heating/Cooling & Energy Experts

Anton’s has been family-owned since 1979. It started in HVAC and has added plumbing plus a genuine energy-services side — home energy audits, insulation and geothermal — that most companies on this list don’t offer. Its technicians are NATE-certified, it’s an independent Trane dealer, and it reports more than 3,500 membership-plan customers. A second office is in Weldon Spring, and it recently expanded into the Metro East.

Address: 950 Bolger Ct, Fenton, MO 63026
Phone: (314) 860-7860
Website: antonshvac.com
Google rating: 4.9★ from 4,789 Google reviews, checked November 2026
Best for: HVAC plus home-energy work — audits, insulation and geothermal

7. Vogel Heating & Cooling

Family-owned and serving St. Louis since 1946, Vogel provides HVAC repair, maintenance and installation for homes and businesses, with 24-hour emergency service. It’s a Carrier Factory Authorized Dealer and also does architectural sheet metal work — a useful combination for commercial and custom residential jobs.

Address: 1642 Manufacturers Dr, Fenton, MO 63026
Phone: (314) 408-6068
Website: vogelheating.com
Google rating: 4.9★ from 1,076 Google reviews, checked November 2026
Best for: South County and Fenton-area homes and businesses

8. Scott-Lee Company

Scott-Lee has been family- and veteran-owned since 1978. It’s the geothermal specialist on this list — ground-source heat pumps are a focus rather than a sideline — alongside conventional heating and cooling service across South County and the wider metro.

Address: 11010 Gravois Industrial Ct, St. Louis, MO 63128
Phone: (314) 756-9444
Website: scottleeheating.com
Google rating: 4.9★ from 2,431 Google reviews, checked November 2026
Best for: Geothermal and heat pump systems

9. Galmiche & Sons Heating & Cooling

Galmiche & Sons began as a gutter installation company in 1950 and grew into a third-generation, family-owned heating and cooling provider. About three-quarters of its work is residential, and it handles design/build projects with an on-staff engineer — the pick here when an install needs engineered plans rather than a like-for-like swap. It installs Lennox and Goodman equipment.

Address: 2280 Chaffee Dr, St. Louis, MO 63146
Phone: (314) 993-1110
Website: galmicheandsons.com
Google rating: 4.5★ from 287 Google reviews, checked November 2026
Best for: Design/build installs and remodels that need engineered plans

10. Welsch Heating & Cooling

Founded in 1895 by Adam Welsch and still owned by the Welsch family, Welsch is the oldest company on this list. It spent more than 75 years on Manchester Road before moving near I-270 and Page Avenue in 1970. It offers 24/7 service on all brands for residential and commercial customers. Its Google review count is the smallest here, which is why a company this established lands at #10 — the rating evidence is thinner than the nine above it.

Address: 2175 Welsch Industrial Ct, St. Louis, MO 63146
Phone: (314) 872-8070
Website: welsch-heatcool.com
Google rating: 4.5★ from 172 Google reviews, checked November 2026
Best for: Around-the-clock service on any brand, from the metro’s oldest HVAC company

How we ranked these HVAC companies

There’s no secret algorithm. We ranked on the things a homeowner can check in an afternoon:

• A real local address. Every company here publishes a street address in the St. Louis metro. National brands with only a city landing page were left out.
• Google rating, read together with review count. A 5.0 from a dozen reviews is not the same evidence as a 4.9 from twelve thousand. Both numbers are printed in every entry, checked November 2026.
• Years in business, and who owns it. Most of this list is family-owned, and the founding years run from 1895 to 1988.
• Services and specialization. Repair, installation and maintenance plans are table stakes; custom ductwork, geothermal, energy audits and design/build capability earned their places.
• Service area. Whether the company actually covers your part of the metro — city, county, St. Charles or the Metro East.
• How clearly the company publishes its details. Companies that put their address, services and plans in the open ranked ahead of companies that hide them behind a call.

Ratings informed this order; they didn’t set it — that’s why the metro’s oldest company sits at #10 and a 5.0-star company sits at #2 instead of #1. Design Aire is #1 because it combines the full package: four generations of family ownership since 1904, a 4.9-star rating across nearly 2,800 reviews, three offices across the metro, and the full service range including maintenance plans. No business paid for placement on this list.

How to choose an HVAC company in St. Louis

• Make sure the company services your system type — furnace, heat pump, boiler, geothermal or ductless — not just heating and cooling in general.
• Ask whether it offers maintenance plans and after-hours or emergency service, and what those cost.
• Get written estimates that list equipment model numbers and efficiency ratings (SEER2 for cooling, AFUE for furnaces), so quotes from different companies describe the same system.
• Check that the company covers your part of the metro — St. Louis City and County, St. Charles County and the Metro East behave like different service markets.
• Ask about Ameren Missouri and Spire rebates and about financing before you sign; high-efficiency systems often qualify for both.
• For a repair quote, ask for the repair-vs-replace math in writing: the repair cost, the system’s age, and what a new system would cost.

Frequently asked questions

How much does a new furnace or air conditioner cost in St. Louis?

Most St. Louis HVAC companies don’t publish system prices, and we won’t invent a range. The price depends on your home’s size, the equipment tier you choose and whether the ductwork needs changes. The useful move is to get written estimates from two or three companies on this list, each listing the exact equipment model numbers and efficiency ratings, so you’re comparing the same system.

How long does it take to replace a furnace or air conditioner?

A straightforward like-for-like replacement is usually a one-day job. Systems that need new ductwork, a fuel-type change or electrical upgrades can take two to three days. Ask for the timeline in writing before you sign, including when permits and inspections happen.

Should I repair or replace my furnace?

A common rule of thumb: if a repair costs more than half the price of a new system and the furnace is over 15 years old, replacement usually wins. If the system is under 10 years old and the repair is minor, repair it. Any company on this list should give you both numbers in writing rather than pushing one option.

How do I choose an HVAC company in St. Louis?

Start with a real local address and a Google rating you can check yourself, then look at what’s published: services, maintenance plans and years in business. Get written estimates with model numbers, ask about after-hours service, and confirm the company covers your part of the metro. The tips section above walks through the full list.

Which St. Louis HVAC company has the highest Google rating?

Seliga Heating & Cooling, at 5.0 stars from 1,889 Google reviews, checked November 2026 — the only perfect 5.0 on this list. Seven other companies here sit at 4.9 stars: Design Aire, Hoffmann Brothers, Jerry Kelly, Classic Aire Care, Anton’s, Vogel and Scott-Lee.

Are HVAC maintenance plans worth it?

For most homeowners, yes — if the plan includes two tune-ups a year and priority scheduling when something breaks. Several companies on this list publish plans, including Design Aire and Classic Aire Care. Regular maintenance also keeps many manufacturers’ warranties valid and catches small problems before they become emergency repairs.

— Alex Wolk, founder of Insite Advice · Spot an error? Tell us and we’ll correct it.