St. Louis Furnace Maintenance, Tune-Ups & Inspections

At Dunn, we ensure your HVAC system is operating at maximum efficiency so you can have more comfort and more money – not to mention less pollution in your environment.

  • The EPA says that 0.042 in. of dirt on an air conditioning coil can reduce its efficiency by 21%.
  • Texas Power & Light found that a 32% cooling undercharge could go unnoticed and result in a 52% reduction in performance.
  • Texas A&M found that an air conditioner’s performance decreased 17% with a 10% undercharge of refrigerant (Freon).
  • The Applied Building Science Center in North Carolina found that the average heat pump operates up to 40% less efficiently than rated.  Poor or no maintenance and improperly trained technicians were the problem.  When technicians were trained properly and given the right tools, the efficiency of the heat pumps increased by 20%.

Not All HVAC Tune-Ups Are Equal

Be aware – some St Louis HVAC Companies offer low-cost, so-called “tune-ups” that in reality are glorified visual inspections designed to get the company’s foot in the door and up-sell a tune-up that’s priced at what would be a financial loss.

Research proves a properly applied heating and cooling tune-up will put money back into your pocket while simultaneously helping the environment. Simple as that. Never assume your HVAC  system is working as efficiently as it could be until a Dunn Heating & Cooling technician verifies it.
Our St. Louis furnace maintenance service areas include the following cities: Chesterfield, Oakville, Wildwood, Ballwin, Mehlville, Kirkwood, Maryland Heights, Webster Groves, Affton, Manchester, Lemay, Creve Coeur, Clayton, Crestwood, Town and Country, Richmond Heights, Ellisville, Ladue, Des Peres, Sunset Hills, Brentwood, Olivette, Shrewsbury, Valley Park, Glendale, Rock Hill, Fenton, Frontenac, Warson Woods and Huntleigh.

Maintenance & Tune-Ups