Those expectations in Northern states and Canada are certainly much longer than many in the Southern U.S.
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Unfortunately, for us, a great deal of our customers are from up North and they have the same expectations for their a/c systems down here.” We must also factor in that we cool for 2,800-3,000 hours a year and the miles add up quickly. “We tend to see eight to 14 years, depending on where the home sits and how well the system is maintained. “In our coastal/subtropical environment, we see a much shorter life span due to the variety of chemicals from saltwater, sulfur, and chemicals used when our residential communities were tomato fields and orange groves,” said Jim Britton, vice president and general manager of Wield One Hour Air Conditioning and Heating in Naples, Florida. While determining a baseline life expectancy for systems is hard enough in its own right, the issue is compounded even further when location is taken into consideration. HVACR systems are harsh environments for electronics.” GOING COASTAL Units with newer staging and modulating controls may last longer because of this - if their electronics hold up. Proper sizing is critical due to its effect on cycling. So, I would tend to look more at cycling as a factor that could shorten a system’s life.
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For furnaces, the temperature extremes between off and on cause expansion and contraction of the heat exchanger, which places more stress on it. Initial current inrush is high for all motors other than the newer electronically controlled ones where the controls prevent this. Lubrication is not as good at first, and some oil gets pumped out and takes a while to return. “For air conditioning, the start-up period is the hardest period for the compressor. “A lot of that comes from the on-off cycling,” he said. Are they frequently opening the door to the outside or is the thermostat constantly being changed? Environmental issues, such as salt air near coastlines or the amount of volatile organic compounds (VOCs) introduced to the indoor air via air fresheners, personal hygiene products, scented laundry products, etc., all play a role.”Ĭarter Stanfield, director of the air conditioning technology department at Athens Technical College in Athens, Georgia, and author of “Fundamentals of HVAC/R,” agreed with Boyd that oversized equipment is going to fail sooner than its properly sized counterparts. Occupant behavior has an effect, as well. The application, sizing, and maintenance are all major factors for how long a system is going to last. “Oversized equipment is going to fail sooner. “Gas furnaces that are properly sized and installed with minimal maintenance 20-30 years,” he said. In his opinion, gas furnaces should last even longer.
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in West Conshohocken, Pennsylvania, also believes a properly installed and sized heat pump/cooling system with minimal maintenance should last 15-20 years. Robin Boyd, technical service advisor, U.S. If there is something new and great that offers a feature that is appealing to me, I may tend to consider replacing the old product earlier.” Additionally, if repair parts are no longer available or some component, such as refrigerant, has or will become obsolete, the system most likely will need to be replaced.
#LENNOX AIR CONDITIONER COMPRESSOR 3.5 TON FULL#
My definition of ‘end of life’ for any appliance is when the unit has been in operation for more than two-thirds of its expected life and needs repairs that exceed 25 percent of the full replacement cost. “Air conditioning units, because they are outdoors and subject to the extremes of the weather, typically have shorter life expectancies of 15 years. “As a consumer and professional, I expect furnaces to last 20 years,” said Tom Beaulieu, president of Bay Area Services Inc. There are also differences depending on exactly which piece of equipment is being discussed.
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