Home Tips : How a Furnace Works. How do central heating systems work? The diagrams and descriptions in this section define central heating and air conditioning, forced-air furnaces, as well as radiant heating systems. Central Heating & Air Conditioning System Diagram A central heating system has a primary heating appliance such as a furnace or boiler located in an out-of-the-way place such as a basement or garage. It delivers heat throughout the house either by pumping warmed air through a system of air ducts or sending hot water or steam through pipes to room radiators or convectors.
With both forced-air and gravity systems, one or more thermostats turn the heating or cooling unit off and on as room temperatures rise and fall. In contemporary homes, ducted air systems are the most common type of central heating and cooling. With a gravity furnace, convection currents (caused by the natural tendency of hot air to rise) carry heated air through the system from a furnace located on or below the main floor. What's wrong with my furnace. Furnace troubleshooting chart.pdf (application/pdf Object) ComparisonWorksheet.pdf (application/pdf Object)
69-2229EF.pdf (application/pdf Object) RTH2310B | 5-2 Day Programmable Thermostat.