Furnace Repairs Knoxville

For furnace and heater repairs done right, call Dean's today.

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When it's cold outside your family needs your furnace to be working properly, your furnace should be serviced each year to ensure they are working properly. Before winter weather hits here in Knoxville be sure to test your furnace out. Whether you have an electric heater or a gas furnace. We can help keep you warm all winter long.

Knoxville Furnace

The majority of us here in Knoxville depend on a central furnace to provide heat for our homes. A furnace works by blowing heated air through ducts that deliver the warm air to rooms throughout the house via air registers. This type of heating system is called a ducted warm-air or forced warm-air distribution system. It can be powered by electricity, natural gas, or fuel oil.

Inside a gas furnace, the fuel is mixed with air and burned. The flames heat a metal heat exchanger where the heat is transferred to air. Air is pushed through the heat exchanger by the “air handler’s” furnace fan and then forced through the ductwork downstream of the heat exchanger. At the furnace, combustion products are vented out of the building through a flue pipe. Older furnaces vented directly to the atmosphere, and wasted about 30% of the fuel energy just to keep the exhaust hot enough to safely rise through the chimney. Current minimum-efficiency furnaces reduce this waste substantially by using an “inducer” fan to pull the exhaust gases through the heat exchanger and induce draft in the chimney. “Condensing” furnaces are designed to reclaim much of this escaping heat by cooling exhaust gases well below 140°F, where water vapor in the exhaust condenses into water. This is the primary feature of a high-efficiency furnace (or boiler). These typically vent through a sidewall with a plastic pipe.

Furnace heating system controls regulate when the various components of the heating system turn on and off. The most important control from your standpoint is the thermostat, which turns the system, or at least the distribution system, on and off to keep you comfortable. A typical forced air system will have a single thermostat. But, there are other internal controls in a heating system, such as “high limit” switches that are part of an invisible but critical set of safety controls.

The best gas furnaces and boilers today have efficiencies over 90%. The efficiency of a fossil-fuel furnace or boiler is a measure of the amount of useful heat produced per unit of input energy (fuel). Combustion efficiency is the simplest measure; it is just the system’s efficiency while it is running. Combustion efficiency is like the miles per gallon your car gets cruising along at 55 miles per hour on the highway.

In the U.S., furnace efficiency is regulated by minimum AFUE (Annual Fuel Utilization Efficiency). AFUE estimates seasonal efficiency, averaging peak and part-load situations. AFUE accounts for start-up, cool-down, and other operating losses that occur in real operating conditions, and includes an estimate of electricity used by the air handler, inducer fan, and controls. AFUE is like your car mileage between fill-ups, including both highway driving and stop-and-go traffic. The higher the AFUE, the more efficient the furnace or boiler.

Heat and Air units in Knoxville

Do you have a central heat and air unit, forced air heating, HVAC heat pump or gas heating? No matter what type of heating system you have our professional heater repair technicians can diagnose and fix it all. And if you need a heater replacement we can even help you with financing.

Our certified heat technicians are experienced and trained to service, maintain, install, and repair all makes and models of heat and air units.

Furnace and Heater repairs done right

All of our furnace repair technicians have years of experience in all aspects of commercial HVAC service in Knoxville. It is mandatory for each technician to complete a full in house training to insure that they are up to date on the latest air conditioning & heating equipment.

We insulate our ductwork to increase efficiency. This is how quality of work sets us apart from other Knoxville heat and air companies. We spend as much time as we need to insure that our jobs are done right and your family is warm. Don't hesitate to call us for an estimate on your furnace repair needs here in Knoxville.

New Installations

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HVAC Units

In need of a new heat and air unit? We can help. Give us a call for a free estimate and information on all financing options available.

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Mini Split Air Conditioner

Ductless air conditioners are for additions, sun rooms, bonus rooms or even in a master bedroom to keep cooler and warm if you choose a system with heat included.

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Water Heaters

We carry and install both tank and tankless water heaters. For high efficiency and instant hot water the tankless systems are the way to go.