Verified St. Louis HVAC and air conditioning companies for AC repair, AC replacement, heating service, and duct work - serving Clayton, Kirkwood, Webster Groves, Chesterfield, Ballwin, University City and beyond.
When the AC dies in July, speed matters - but so does not getting sold a system two sizes too big. A top-rated HVAC company quotes load calculations, not guesses, and stands behind the install with a real labor warranty.
Brick century homes, real basements, and four hard seasons: St. Louis is a market where knowing old construction is the whole job. When you compare HVAC and air conditioning companies in St. Louis, ask every one of them the same three questions: are you licensed and insured for this exact work, who is actually showing up (your crew or a sub), and what does the warranty cover in writing.
Searching for HVAC and air conditioning companies near me in St. Louis? Everyone ranked below serves St. Louis and the surrounding neighborhoods, including Clayton, Kirkwood, Webster Groves, Chesterfield, Ballwin, University City. Check the address and service area on a listing before you call, because the closest one is not always the one a search engine puts first.
If this is an emergency, call rather than fill in a form. An AC that dies in a heat wave, or heat that dies in a freeze, is the case for calling instead of waiting for morning. Ask up front whether they are dispatching tonight and what the after-hours call-out fee is: 24/7 availability is not something a star rating can tell you.
Based on Google ratings and review volume as of September 2026, the top rated HVAC and air conditioning companies in St. Louis are Seliga Heating and Cooling, Design Aire Heating & Cooling - St. Louis, 1St Global Air Duct Cleaning. See the live ranked list, ratings, and contact details on this page.
Every company ranked on this page serves St. Louis and the surrounding area, including Clayton, Kirkwood, Webster Groves, Chesterfield, Ballwin, University City. Open any listing for its address, phone number and service area, then call the two or three closest to you. Distance is worth checking yourself: the nearest HVAC company is not automatically the best one, so this page ranks on rating and review volume first and leaves proximity to you.
After-hours availability is not part of a Google rating, so this directory cannot verify it for you in advance. An AC that dies in a heat wave, or heat that dies in a freeze, is the case for calling instead of waiting for morning. Call the top rated HVAC and air conditioning companies on this page and ask two things before you agree to anything: are you dispatching tonight, and what is the after-hours call-out fee. A company that answers both plainly on the phone is usually the one that actually shows up.
When the AC dies in July, speed matters - but so does not getting sold a system two sizes too big. A top-rated HVAC company quotes load calculations, not guesses, and stands behind the install with a real labor warranty.
Run a business in hvac & air conditioning? After Hours AI answers your calls 24/7 so you never miss a customer.
Listings and claims are free. Early claimants receive Premium at no charge, a $297 value, after confirmation. No purchase is required.
Claim your free listingPrefer to talk? Call or text the Top Rated directory on (813) 454-0813. This is our number, not the number of any business listed here.