Originally Posted By: mroach This post was automatically imported from our archived forum.
I need information on how to determine the age of units and what the ton rating is. Any help is appreciated.
Thanks'
Mark
-- Mark Roach
A Professional Home Inspection
TREC# 6467
http://www.aprofessionalhomeinspection.com
"Your Best Protection is a Professional Home Inspection"
Klien Volunteer Fireman
Originally Posted By: Blaine Wiley This post was automatically imported from our archived forum.
If you don’t have a Prestons guide and don’t want to spend the bucks on one, most manufacturers have the manufacture date encoded in the serial number, and the tonnage in the model number on the data plate. For instance on a Carrier or Bryant AC or HP the serial number might say 1004XXXXX which would be the tenth week of 2004, and the model number might say 661CJ060-A which would be a 5 ton unit (060).
Originally Posted By: hgordon This post was automatically imported from our archived forum.
Aside from that…
Most of the time you can determine the AGE and TON by looking at the dataplate...in the Serial Number and Model Number you will usually find the clues...look for obvious clues; year compared to year of home or other appliances and also as far as tonnage look for the number divisible by 12.
Someone sent me there "cheat sheet"...if you want I will email it to you.
Originally Posted By: hgordon This post was automatically imported from our archived forum.
Blaine…I started my post after Kevins…but was interrupted by a call…yours must have come in during that time but I did not see it.
To all who read this...I not only think Blaine is a great Home inspector...but I perceive that he is intelligent and very good looking...how's that Blaine 
Originally Posted By: mroach This post was automatically imported from our archived forum.
How accurate is using this method? I ask because I was told that it wasn’t always right. So I never put any effort into figuring it out.
Gordan I shot you an email.
Thanks'
Mark
-- Mark Roach
A Professional Home Inspection
TREC# 6467
http://www.aprofessionalhomeinspection.com
"Your Best Protection is a Professional Home Inspection"
Klien Volunteer Fireman
Originally Posted By: Blaine Wiley This post was automatically imported from our archived forum.
It has worked for me for 10 years. But, someone will tell me why I’m wrong.
Some units are a little different. Rheem uses 25 for their two ton unit, 31 for 2?, etc. York has a code in their serial number for the date of manufacture. As I recall some boilers are really strange, but thankfully I don't see boilers anymore 
Originally Posted By: dbowers This post was automatically imported from our archived forum.
Mark -
Don'r dink around with guessing. Some units its very easy to determine = on others (Sears, Whirlpool, etc) its a nightmare. Get professional and buy the Preston Guide or Carrier Blubook - they're both very inexpensive
(under $100).
Originally Posted By: msheckler This post was automatically imported from our archived forum.
hgordon wrote:
Aside from that...
Most of the time you can determine the AGE and TON by looking at the dataplate...in the Serial Number and Model Number you will usually find the clues...look for obvious clues; year compared to year of home or other appliances and also as far as tonnage look for the number divisible by 12.
Someone sent me there "cheat sheet"...if you want I will email it to you.
Hgordon,
please email me your cheat sheet as soon as you can.
Thanks to my Nachi Inspector Member. email ffs@megaswap.com
msheckler
