High efficiency furnace venting

Specific Inspection Topics Inspecting HVAC Systems
1

I don’t see a lot of HE furnaces in the tract homes around here, but most have an intake in the attic and exhaust through the roof or the intake as a downward ‘J’ at the roof near the vertical exhaust vent.

This one was a 2015 Carrier 59SP5A with intake and exhaust together vented to the exterior. Appeared to be an aftermarket ‘diversitech’ style or concentric vent kit. I wasn’t able to find in the furnace installation manual where these vents were acceptable or not. Any insight on this installation?

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http://www.diversitech.com/Product-Line?id=a0jC0000005QG0EIAW

2

Hope this helps,

3

pg 12 shows what a concentric vent kit is, but doesn’t specify use of it. If they show it in the manual without a big ‘X’ over it, I suppose it’s fine.

4

Looks typical.

5

I haven’t seen any HE furnaces in a while. I am located in st. charles, Mo. Good luck on the install.

6

What is that puddle of water in the aux drain pan?

May have something to do with the vent operation.

7

No water, that’s simply an area of dust that has been disturbed.
That install is absolutely fine …

8

Call a Carrier Distributor or Dealer and ask.

MB Kiser; Carrier-Bock; Savage Heating & Air.