![]() ![]() ![]() Visit our HEATING AND AIR CONDITIONING page for other related blog posts on this subject, or go to the INDEX for a complete listing of all our articles.How old is the furnace in your home or prospective new home? Appliances do not live forever, so it is imperative that you know just how old your unit is. Will closing doors reduce my heating and cooling costs?.Can the return air be in the same room as the gas furnace?.What are the most common problems with wall/window air conditioners?.Why is my air conditioner not cooling enough?.Why does it take so long to cool a house when an air conditioner has been off for a while?.Why has the thermostat screen gone blank?.What is wrong with an air conditioner when the air flow out of the vents is low?.Is a furnace allowed in a bedroom, bathroom, or an adjoining closet?.How did homes stay cool in Florida before air conditioning?.Does an old air conditioner use more electricity as it ages?.What is the minimum slope of a flue connector for a gas furnace or water heater?.Where is the air filter for my central air conditioner and furnace? I can’t find it?.What color should the flame be in a natural gas furnace?.Is the energy efficiency of the furnace part of the SEER rating of a central air conditioning system?.To learn more about heating and air conditioning systems, see these other blog posts: How can I find out the size of my air conditioner?.How can I tell whether the condenser (outdoor unit) is an air conditioner or heat pump?. ![]() How can I find out the SEER of my air conditioner?.To determine other key specs of your HVAC system, see one of these other blog posts: To determine the age of a American Standard air conditioner or heat pump, go to our blog post How can I determine the age of an American Standard air conditioner or heat pump from the serial number? Many, but not all, furnace data plates will also state the month and year of manufacture somewhere on the data plate, like the examples below. Notice that the year that the letter indicates is corroborated by the 1990 year of the ANSI rating above it, which should be the same year or just a few years earlier. So the serial number shown below indicates that the furnace was manufactured in 1992. Many units have the date of manufacture stated below the serial number.Ģ) 1983 to 2001 - If the serial number starts with a letter, then that is the encoded year. Beginning in 2010, the first two digits are the year. 1) 2002 to present - If the serial number is a 9-digit combination of letters and numbers that starts with a number, then the first number is the year. ![]()
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