Welcome to
DEKA Service

A Top St Louis Mechanical Contractor


About DEKA

DEKA Service is an HVAC/R service company primarily focused on commercial and industrial mechanical systems.  Our mission is to supply high quality heating, cooling, ventilation, filtration, kitchen and piping products and support for our customers' existing equipment.  We support various types of systems including refrigeration, chilled and hot water, steam, ventilation, and kitchen ventilation, prep and cooking equipment. 

24 hr Emergency Service

We're available 24 hrs a day, 7 days a week including holidays to insure your equipment is operating when needed.

HVAC Services


We maintain HVAC equipment to each manufacturers recommend seasonal maintenance requirements to extend the life of your equipment.



We repair all makes of HVAC equipment and offers around the clock availability for emergencies to get you back online when needed.


From small mini-split A/C units to high tonnage chillers, we can handle your installation. DEKA Service provides brand name equipment and experienced installers to make your installation project a success. 

What We Do


We Service the Following:

  • Air Conditioning & Heating Systems
  • Chiller Systems
  • Steam and Hot Water Boilers
  • Cooling Towers
  • Piping Systems and Pumps
  • Humidification Systems
  • Mini-Split Systems
  • IT Room Cooling
  • Building Control Systems
  • Ventilation & Exhaust Systems
  • Filtration/Indoor Air Quality Systems
  • Compressed Air Systems
  • Kitchen Exhaust Systems
  • Kitchen Equipment Repair

Additional Services:

  • Seasonal Maintenance Agreements
  • Upgrade and Replacement Equipment
  • Custom Duct Designs & Modifications
  • Air & Water Balancing
  • Leak testing of Piping Systems
  • 24 hour HVAC Emergency Service

Brands We Service:

  • York / Guardian
  • Trane / American Standard
  • Carrier / Payne / Bryant
  • Lennox / Aire-Flo
  • Aaon
  • Marlo
  • McQuay
  • Goodman / Amana
  • Heil
  • Kenmore
  • LG
  • Daikin
  • Fujitsu
  • Sharp
  • And Many More

Contact Us

Contact DEKA!

For all your HVAC service needs

When you need service on your chiller, boiler, A/C system, or kitchen ventilation equipment, contact DEKA Service to request one of our certified professional technicians.

DEKA Service

1802 Larkin Williams Rd, Fenton, Missouri 63026, United States



24 Hour Emergency Service available.   

Office Hours:  Monday-Friday,