HVAC Plumbing

jharrison · August 13, 2011, 4:48pm

Can anyone tell me why these lines have this section installed in it.

These are the Fresh air and exhaust lines to the furnace.

kwood · August 13, 2011, 5:03pm

To muffle the sound of most lennox pulse furnaces.

dandersen · August 13, 2011, 5:36pm

Yup.

jharrison · August 13, 2011, 5:43pm

So no problem with the installation then??

Thanks guys.

kwood · August 13, 2011, 11:49pm

Correct

roconnor · August 14, 2011, 4:18pm

If thats the venting for a Lennox G14 or GSR14 series pulse furnace, there have been a history of problems with cracked heat exchangers. Those need evaluation by a specialist.

http://www.inspectapedia.com/heat/lennox1.htm

.

jharrison · August 14, 2011, 5:25pm

I was unable to verify the date aside from a sharpie marking dating for March of 1983.
Due to a low output of heat from the registers. A temp diff of 6 degrees on both heat and cool cycles, and an unknown last service date.

I recommended a full system evaluation by a licensed HVAC tech before further pursuit of purchase.

dandersen · August 15, 2011, 2:20pm

You can get a 6° temperature difference just because the duct passes through the attic or crawlspace.

I don’t think anything was working.

mlarson · August 15, 2011, 10:55pm

Please inform your client as these can be a very real safety hazard.

More info:

http://www.inspectapedia.com/heat/lennox1.htm