Service Areas

Areas We Serve

St. Louis City/County

  • Affton
  • Arnold
  • Ballwin
  • Brentwood
  • Bridgeton
  • Chesterfield
  • Clarkson Valley
  • Clayton
  • Concord
  • Crestwood
  • Creve Coeur
  • Des Peres
  • Ellisville
  • Eureka
  • Fenton
  • Florissant
  • Frontenac
  • Glencoe
  • Grover
  • Hazelwood
  • Imperial
  • Kirkwood
  • Ladue
  • Lemay
  • Manchester
  • Maplewood
  • Maryland Heights
  • Oakville
  • Overland
  • Richmond Heights
  • St. Albans
  • St. Ann
  • Sunset Hills
  • Town & Country
  • Unincorporated St. Louis County
  • University City
  • Valley Park
  • Webster Groves
  • Wildwood

St. Charles County

  • Cottleville
  • Dardene Prairie
  • Lake St. Louis
  • Wentzville

Illinois

  • Belleville
  • Collinsville
  • Columbia
  • Edwardsville
  • Fairview Heights
  • Maryville
  • O’Fallon, IL
  • Shiloh
  • Swansea

Service Map

ServiceArea

Reviews

They did a great job on installation of new duct work & installing furnace with new outdoor unit.

RHK

I was very happy with the prompt, professional service when we purchased our new furnace. All options were presented in a clear, concise way. I would definite recommend Welsch.

Mary H.

I would like to again compliment one of your fine employees.  He comes two times a year and is always on time, I told him if he is early come anyway, so now he is a little early, great.  He is very efficient and I think does a good job,...

Dan V.

Beginning with the initial contact I felt comfortable with the completeness of information given and the professionalism during bidding and installation. Installers were respectful and willing to answer any questions. This first experience along with the recommendations received from friends assure me this is a company I know I can...

1000Swifts

On Sunday evening during the high heat, I called as the a/c was providing warm air.  I received a call that Service was alerted.  Without any intervention on my part, the problem was determined and a new a/c was in operation by 2:00 PM.  That’s “organization”.

Russ B.

More Reviews

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