# need help on these Ages and sizes **URL:** \ **Category:** Public Archive\ **Created:** [September 19, 2005, 12:00am UTC](https://forum.nachi.org/t/need-help-on-these-ages-and-sizes/190703 "2005-09-19T00:00:00Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![system](https://global.discourse-cdn.com/internachi/original/3X/d/f/df7ced6a9ca05e7c93fa949dfc12a8c10d06c887.png) [@system](https://forum.nachi.org/u/system)\ **Post date:** [September 19, 2005, 12:00am UTC](https://forum.nachi.org/t/need-help-on-these-ages-and-sizes/190703/1 "2005-09-19T00:00:00Z")
**Originally Posted By: rharrington** **This post was automatically imported from our archived forum.** * * * First time I’ve run into these large units. Armstrong AC model - SCU10A60A SN - 8499A13317 Ruud 90 furnace UGEB-12EE-JS HN5D307 125,000 btu on the furnace tag * * * -- Rick A. Harrington Central Ohio Home Inspections [www.patchhomeinspections.com](http://www.patchhomeinspections.com) ---
**Author:** ![system](https://global.discourse-cdn.com/internachi/original/3X/d/f/df7ced6a9ca05e7c93fa949dfc12a8c10d06c887.png) [@system](https://forum.nachi.org/u/system)\ **Post date:** [September 18, 2005, 12:00am UTC](https://forum.nachi.org/t/need-help-on-these-ages-and-sizes/190703/2 "2005-09-18T00:00:00Z")
**Originally Posted By: Steven Brewster** **This post was automatically imported from our archived forum.** * * * Try this topic which is on page two of this section. Rheem age please. Prestons states that the RUUD by model # is between 1988-1995. Are you sure the serial # is correct? [http://www.nachi.org/bbsystem/viewtopic.php?t=14949](http://www.nachi.org/bbsystem/viewtopic.php?t=14949) Hope this helps. * * * ---
**Author:** ![system](https://global.discourse-cdn.com/internachi/original/3X/d/f/df7ced6a9ca05e7c93fa949dfc12a8c10d06c887.png) [@system](https://forum.nachi.org/u/system)\ **Post date:** [September 18, 2005, 12:00am UTC](https://forum.nachi.org/t/need-help-on-these-ages-and-sizes/190703/3 "2005-09-18T00:00:00Z")
**Originally Posted By: rharrington** **This post was automatically imported from our archived forum.** * * * in the model for 5 ton 99 in the serial number for year I was told by the agent they were both original … house built in 1989 I'll have to call tomorrow. [[/b] * * * -- Rick A. Harrington Central Ohio Home Inspections [www.patchhomeinspections.com](http://www.patchhomeinspections.com) ---
**Author:** ![system](https://global.discourse-cdn.com/internachi/original/3X/d/f/df7ced6a9ca05e7c93fa949dfc12a8c10d06c887.png) [@system](https://forum.nachi.org/u/system)\ **Post date:** [September 19, 2005, 12:00am UTC](https://forum.nachi.org/t/need-help-on-these-ages-and-sizes/190703/4 "2005-09-19T00:00:00Z")
**Originally Posted By: rharrington** **This post was automatically imported from our archived forum.** * * * contacted Armstrong at 1-800-448-5872 This is a 5 ton 10SEER unit manufactured in Jan 1999. I have asked them for information about their serial number and model number configurations. I'll pass it on if they send it. Thanks, Rick * * * -- Rick A. Harrington Central Ohio Home Inspections [www.patchhomeinspections.com](http://www.patchhomeinspections.com) ---
**Author:** ![system](https://global.discourse-cdn.com/internachi/original/3X/d/f/df7ced6a9ca05e7c93fa949dfc12a8c10d06c887.png) [@system](https://forum.nachi.org/u/system)\ **Post date:** [September 19, 2005, 12:00am UTC](https://forum.nachi.org/t/need-help-on-these-ages-and-sizes/190703/5 "2005-09-19T00:00:00Z")
**Originally Posted By: jeffghooper** **This post was automatically imported from our archived forum.** * * * | **Quote:** | | SN - 8499A13317 | Reads, 84=Jan, 99=1999. What is the SN for the RUUD? Sounds original. Never mind I see it now. | **Quote:** | | F0588 3754.... that is May 88. | Correct. * * * -- Jeff G. Hooper (hooperette want a be) nachiBFD ---
**Author:** ![system](https://global.discourse-cdn.com/internachi/original/3X/d/f/df7ced6a9ca05e7c93fa949dfc12a8c10d06c887.png) [@system](https://forum.nachi.org/u/system)\ **Post date:** [September 19, 2005, 12:00am UTC](https://forum.nachi.org/t/need-help-on-these-ages-and-sizes/190703/6 "2005-09-19T00:00:00Z")
**Originally Posted By: jmichalski** **This post was automatically imported from our archived forum.** * * * Don’t remember where i “borrowed” this from, but it is a decent guide for referral… HVAC AGE CODES IN SERIAL # INFO Rheem & Rudd: in the middle of the serial number will be a letter "F" the following four numbers are the week and year. Carrier, Bryant, Payne, Day & Night: Recently (last 20 years or so) the first four numbers in the serial number represent the week and year. Previously, it was a complex series of letters and single digits. Call 905 672-0860 if you get stuck. Lennox: Either the first two or second two digits are the year, it varies by era, but most of them actually have a separate sticker somewhere that has the year printed on it. Newer ones are first two equals manufacturing plant #, 2nd two are year and letter in fifth slot is month (A thru M minus I). So 5898G 07568 would be Plant # 58, Year of MFR would be 98 and month would be July. Amana: BLACKHORSE. B=1971 or 1981. (Of course, now that they've been bought by Goodman, who knows what'll happen.) Goodman: First two digits of the serial number are the year. Second two are the month. Btu rating is model number..ie; GMP075-3 (75,000 bonnet input) Compressor is same :serial # 9709088872 (yr1997 wk 09) Tonnage is model # CK361C The first two numbers after the CK (letters) divided by 12 is tons. ie: 36 div by 12= 3 tons. YORK HVAC DATING (Unitary Products since 1984) Note: they skip the letters I, O, Q, U, Z. Year of make indicated by 3rd letter in the serial number. 1971 - A 1992 - A 1972 - B 1993 - B 1973 - C 1994 - C 1974 - D 1995 - D 1975 - E 1996 - E 1976 - F 1997 - F 1977 - G 1998 - G 1978 - H 1999 - H 1979 - J 2000 - J 1980 - K 2001 - K 1981 - L 2002 - L 1982 ? M 2003-M 1983 ? N 2004-N 1984 ? P 2005- P 1985 - R 1986 - S 1987 - T 1988 - V 1989 - W 1990 - X 1991 ? Y * * *