sidewall venting a high-efficiency boiler

Steve Goldstein

I've noticed on many homes with high-efficiency heating systems that the vent coming out of the sidewall is often shaped like a gooseneck--that is, it comes out of the sidewall, takes a 90* turn up for a ways, then takes another 90* turn away from the house.

In some cases, I'm sure that this is because the exit point from the sidewall is too low to meet spec, so the installer used this technique to gain some height. But in other cases (when the house has a tall foundation), the extra height isn't necessary, yet I see this gooseneck approach anyways.

Is it **always** necessary to gooseneck the vent? If so, why?

CHARLES_4

Side wall venting

It is **always** necessary to read the I&O manual for the given equipment to know how the manufacturer wants his equipment to be installed. It's easier to do it right than it is to do it over...

Ted_13

Recirc of flue gasses

is probably why. I have also seen a concentric vent used which combines air in and exhaust out into one penatration. I think it is much neater but also costs a bit more.

FredR

Often the height is required to clear average snow accumulation. As stated earlier I&O instructions should always be followed.