Sears Comfortmaker
cat 1
Direct vent
Has induced vent in Unit
also has a damper at base of B vent
also has additional power type vent installed in line
approx 15 foot run
goes out side wall in basement
What gives as far as why additional power venting and can this be an issue?
also the air intake is like a cat 4
never seen this on the 11 year old Unit before.
Bob, A cat I with draft inducer can only push 15 -20 feet tops, depending on the angle how many elbows, the additional blower assembly at the end of the run finished getting the burned fuel out of the FAU/building, some require a damper, You should have just called.
These are the systems installed to replace the recalled HTPV High Temperature Plastic Vent systems. And is also to be used where sidewall venting is the only option and is not for use with condensing furnaces.
Thanks for the links but what about that air intake?
I know it is ok mto be drawing inside air but this is drawing inside the cabinet Unit air. (no pipe)
The installation instructions will have to be checked. Normally not an issue unless lack of combustion air is an issue. Which can be verified by a combustion test of flue gases and draft measurement. There are air louvers on the front of the furnace and that is where combustion air is drawn into the furnace from the mechanical room. If combustion air is adequate in the mechanical room combustion test should be good.
After looking at your photo the furnace ID Tag on the far right at the top part of the tag is cropped out but the second line does say “or direct vent”