How To Look At A House
McGarry and Madsen's home inspection blog for buyers of
site-built, mobile/manufactured and modular homes
How can I tell the age of a Janitrol air conditioner or furnace from the serial number?
Saturday, June 23, 2018
The Janitrol brand was manufactured by Goodman Manufacturing Company from 1982 to the mid-1990s. The serial number system was the same as for Goodman systems, which is that the first two numbers are the year of manufacture. The data plate on the side of the unit also had Goodman Manufacturing listed at the top. The example below indicates that the air conditioning condenser was manufactured in 1991. For the age of another brand or manufacturer, go to our blog post How do I determine the age of my air conditioner?
To find the size of a Janitrol unit, go to What size in tons is a Janitrol air conditioner or heat pump from the model number? And to figure out what all the other numbers listed on the condenser data plate mean, go to our blog post How do I understand the air conditioner or heat pump condenser label (data plate)?
To determine other key specs of your HVAC system, see one of these other blog posts:
To find the age of other home components, go to How can I find out the age of a roof? and How do I determine the age of an electrical panel? and How do I determine the age of my water heater? For life expectancies, visit What is the average life expectancy of the components of a house?
To learn more about heating and air conditioning systems, see these other blog posts:
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Field Guide for Home Inspectors, a quick reference for finding the age of 154 brands of HVAC systems, water heaters, and electrical panels, plus 210 code standards for site-built and manufactured homes, and the life expectancy rating of 195 home components. Available at amazon.com for $19.95.
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