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 Ruud air conditioner or furnace from the serial number?
Saturday, June 23, 2018
Find the letter in the middle of the serial number. The first two numbers after it are the week of manufacture, and the third and fourth numbers after the letter are the year of manufacture. The month and year of manufacture is also indicated at the upper right of the data plate. So the “M3004” in the serial number below means it was manufactured in the 30th week of 2004, and the “MFD. 07/04” confirms it. 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 your Ruud system, go to How many tons is my Ruud air conditioner or heat pump?
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?
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To learn more about heating and air conditioning systems, see these other blog posts:
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