Do you know How to Locate your Furnace?
Air circulation in your home
If you have central heating, the furnace (also known as an air handler) in your home will heat your air in the winter while the blower motor circulates the air throughout your home. The AC evaporator coils for your air handler remove heat and humidity in summer. After your furnace heats or cools your air, it is then supplied to the duct system and the air begins flowing through your registers.
How many air systems run in your home?
Your thermostat is what sets the temperature in your home for your comfort. The number of thermostat(s) determine how many systems work to regulate your indoor air for heating and cooling.
Improve IAQ with Duct cleaning
Air duct cleaning can help reduce allergies from dust and other pollutants. Pollen, dust, and mold spores can get trapped in your duct work, which means that it's being continuously circulated throughout the air you breathe at home.
According to the U.S. Department of Energy (DOE), 25 to 40 percent of the energy used for heating or cooling a home is wasted. Contaminants in the heating and cooling system cause it to work harder and shorten the life of your system. Although filters are used, the heating and cooling system still gets dirty through normal use.
The National Air Duct Cleaners Association (NADCA) recommends air duct cleaning for improvement of Indoor Air Quality (IAQ). A certified duct cleaning will include cleaning of the furnace, the main trunk line [for air circulation] and all vents (including supplies and returns) each cleaned out individually.
Where is a furnace/air-handler typically located in a home?
Typically your furnace is centrally located in the home. It is usually located in an area such as a utility closet (by a cold air return), garage, attic, basement, or crawlspace; in the case of a heat-pump (a dual-system) it will be located outside of the home. When your system is run with a heat pump, it is likely a typical duct cleaning will include cleaning of evaporator coils with full system cleanings. Your furnace is usually located by other mechanical equipment such as the hot water heater, a [permanently installed] central vacuum cleaner, or a water softener, if this equipment is installed in your home.