High Efficiency Furnace Problems And Reviews

Question: My high efficiency furnace intake pipe (2" abs) is clogging with frost. i have disconnected it at the furnace

(Posted by: Greg B on 2007-02-13 14:49:16)

Is this ok as a temporary measure and how can I stop the frost from forming in the pipe. The exhaust pipe is located between houses as is the intake. Problem is the neighbours exhasu is there as well as his dryer vent and my hot water heater direct vent exhaust. If they are all going at once could be trouble however the neighbors intake does not get clogged...

Posted by: no_strings_72756 on 2007-02-13, 15:32:28

For temporary.. yes, this is ok, its just bringing in fresh air. better that than the exhaust. as long as it can get air, it will be ok, be sure and connect it back when it thaws. as it looks..... that may be june. lol.

Posted by: BUBBA~THE~POOCH on 2007-02-13, 15:58:08

Yes that is fine. The only thing you are doing is taking combustion air from the living space. You might consider extending your intake pipe away from the others. PVC glue and some fittings should do it for you.

Posted by: bob r on 2007-02-13, 16:26:01

Exhaust & Intake air are to close together Look at installers guide it should tell you how far apart they should be from each other.

Posted by: tony a on 2007-02-13, 19:22:36

The exhast and intake are supposed to be with in 6 inches in kenth .for proper balance in order to get complete combustion .i would add to the pipes instead of taking away.just make sure that you have working co detectors ...........good luck

Posted by: Brian M on 2007-02-13, 20:11:41

Sounds to me like your intake is bringing in cold air through a warm pipe creating condensation which is accumulating and then freezing. Try wrapping the last 5 or 6 feet of the intake closest to the outside wall with insulation. If you have your owners manual it should have specs as to where you can and can't locate your exhaust/ intake. Local code may vary from this tho. Another option may be to contact the manufacturer and tell them what is going on, they may have a better solution.