Combustion for HE furnace

[Buck Hartley, CMI]

Coumbustion being taken from large unfinished basement. See any problems. Should there be a screen over the intake.

Thanks!

[iniquette]

http://www.nachi.org/forum/f20/missi...ng-here-47746/

Looks like same unit.

[Buck Hartley, CMI]

Ian,

Thanks, it is the same unit.

[Gary Farnsworth]

When I see an intake, I always suggest to route to outside of home and/or refer to manufacturer's installation instructions. Intake inside the home can cause low pressure area, IMHO.

[Michael Larson]

It's not really an issue as pictured in an unfinished basement.

It is good to recommend running it to the exterior if they plan to the basement at a later date.

[staylor5]

The elbow is all the manufacturers directions says it needs.

[John Allingham]

That's typically the way the builders do it around here.

[Buck Hartley, CMI]

I did a search about GOODMAN, they say it is OK!

[Greg Veal]

I agree with Michael, as shown, it should not be a problem. I don't think it is best design as installed, but I don't the Manuf. will have any problems. No screens needed, unless the area is susceptible to rodent or other pest activity, or children playing around ad possibly putting something into the elbow.

[Marcel Gratton]

Originally Posted by iniquette

http://www.nachi.org/forum/f20/missi...ng-here-47746/

Looks like same unit.

Usually, what I find in this situation is a separate air supply pipe positioned between the furnace and water heater.

It provides combustion air for both gas appliances.