Help to determine the year it was manufactured a National Comfort furnace?

[Dan Joandrea]

I have a furnace made by National Comfort Products and I need some help determine the year it was manufactured:

Model: CPG42451-E
Serial: 350A9935


Thank you very much for all your help!!

[Roger Smith]

Don,

Some time ago I downloaded a document that showed how to use serial numbers to decipher furnace manufacture dates. I don't recall where I obtained the document or I would send a link. I tried to attach it here in word format but it didn't work either. There's reference for National Comfort but Comfort Maker and International Comfort are listed. According to my assessment it appears your furnace manufacture date is January 1999. Use the first letter for the month (skipping I) followed by two digit year.

[Bob Wisnewski]

This is a link to the site I use for HVAC and Water Heater dates of manufacture.

manufacture or age of a NATIONAL COMFORT PRODUCTS® HVAC Systems | Building Intelligence Center (http://www.buildingcenter.org/national-comfort-products)