# Age of Lennox Pulse Furnace

**URL:** <https://forum.nachi.org/t/age-of-lennox-pulse-furnace/26523>\
**Category:** Inspecting HVAC Systems\
**Created:** [March 25, 2008, 12:40am UTC](https://forum.nachi.org/t/age-of-lennox-pulse-furnace/26523 "2008-03-25T00:40:06Z")\
**Posts on this page:** 5\
**Page:** 1

<div class="post-metadata">

**Author:** ![bhartley](https://sea2.discourse-cdn.com/internachi/user_avatar/forum.nachi.org/bhartley/32/1448_2.png) [@bhartley](https://forum.nachi.org/u/bhartley)\
**Post date:** [March 25, 2008, 12:40am UTC](https://forum.nachi.org/t/age-of-lennox-pulse-furnace/26523/1 "2008-03-25T00:40:06Z")

</div>

I need help with the age of Lennox Pulse furnace. MODEL # G14Q415-100-6.

Thanks in advance for all your help.

---

<div class="post-metadata">

**Author:** ![rcooke](https://sea2.discourse-cdn.com/internachi/user_avatar/forum.nachi.org/rcooke/32/57038_2.png) [@rcooke](https://forum.nachi.org/u/rcooke)\
**Post date:** [March 25, 2008, 12:58am UTC](https://forum.nachi.org/t/age-of-lennox-pulse-furnace/26523/2 "2008-03-25T00:58:47Z")

</div>

> [@bhartley](#):
>
> I need help with the age of Lennox Pulse furnace. MODEL # G14Q415-100-6.
> 
> Thanks in advance for all your help.

I think they are old and obsolete and there was a recall . Will have a look and let you know  
…Cookie

Added folow this thread Roy

[http://www.nachi.org/forum/showthread.php?t=15416](http://www.nachi.org/forum/showthread.php?t=15416)

---

<div class="post-metadata">

**Author:** ![ccurrins](https://sea2.discourse-cdn.com/internachi/user_avatar/forum.nachi.org/ccurrins/32/225758_2.png) [@ccurrins](https://forum.nachi.org/u/ccurrins)\
**Post date:** [March 25, 2008, 3:49am UTC](https://forum.nachi.org/t/age-of-lennox-pulse-furnace/26523/3 "2008-03-25T03:49:21Z")

</div>

This is for serial numbers.

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.

---

<div class="post-metadata">

**Author:** ![rray](https://sea2.discourse-cdn.com/internachi/user_avatar/forum.nachi.org/rray/32/2162_2.png) [@rray](https://forum.nachi.org/u/rray)\
**Post date:** [March 25, 2008, 4:38am UTC](https://forum.nachi.org/t/age-of-lennox-pulse-furnace/26523/4 "2008-03-25T04:38:21Z")

</div>

> [@bhartley](#):
>
> I need help with the age of Lennox Pulse furnace. MODEL # G14Q415-100-6.
> 
> Thanks in advance for all your help.

I’ve learned not to use model numbers to determine age, although it can be done well in some circumstances. Model numbers, though, are like car models: the Mustang model has been made from 1964 to today, but that ol’ serial number will tell me everything I need to know about the date it was made.

---

<div class="post-metadata">

**Author:** ![bhartley](https://sea2.discourse-cdn.com/internachi/user_avatar/forum.nachi.org/bhartley/32/1448_2.png) [@bhartley](https://forum.nachi.org/u/bhartley)\
**Post date:** [March 25, 2008, 11:27pm UTC](https://forum.nachi.org/t/age-of-lennox-pulse-furnace/26523/5 "2008-03-25T23:27:14Z")

</div>

Thanks! I have a HAVC person inspecting the furance.