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Subject Author Date
Is A Flue Cap Required? DerbyDad03 12-02-2006
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Posted by DerbyDad03 on December 2, 2006, 11:15 am


Situation:

- Western New York house built in 1956.
- 7" OD Type "B" Unlined Flue
- Flue originally for gas furnace and hot water heater, now just used
for hot water heater.
- Flue goes straight down into concrete slab basement floor.

Problem:

- Last night the high winds blew the cone shaped cap off the top of
the flue.

Questions:

- Do I need to replace it?
- Will any water or snow that gets in the flue cause a problem?

Thanks!


Posted by Don Phillipson on December 2, 2006, 11:52 am



> - 7" OD Type "B" Unlined Flue
> - Flue originally for gas furnace and hot water heater, now just used
> for hot water heater. . . .
> - Last night the high winds blew the cone shaped cap off the top of
> the flue. . . .
> - Do I need to replace it?
> - Will any water or snow that gets in the flue cause a problem?

Just about every chimney needs a squirrel cage with
rainproof cap. Small animals that enter via a cold
chimney (squirrels, bats, mice) create noise and perhaps
smell if they die there. Rain and winter ice can crack
open masonry chimneys.

--
Don Phillipson
Carlsbad Springs
(Ottawa, Canada)



Posted by Tom The Great on December 2, 2006, 1:35 pm


wrote:

>Situation:
>
> - Western New York house built in 1956.
> - 7" OD Type "B" Unlined Flue
> - Flue originally for gas furnace and hot water heater, now just used
>for hot water heater.
> - Flue goes straight down into concrete slab basement floor.
>
>Problem:
>
> - Last night the high winds blew the cone shaped cap off the top of
>the flue.
>
>Questions:
>
> - Do I need to replace it?
> - Will any water or snow that gets in the flue cause a problem?
>
>Thanks!


IMHO: Flues are designed to give a path for exhaust gases out of a
building. So they are not designed for rain/snow intake, or animals
nesting. A cap would make sense. :D

later,

tom @ www.MeetANewFriend.com



Posted by C & E on December 2, 2006, 5:57 pm



> Situation:
>
> - Western New York house built in 1956.
> - 7" OD Type "B" Unlined Flue
> - Flue originally for gas furnace and hot water heater, now just used
> for hot water heater.
> - Flue goes straight down into concrete slab basement floor.
>
> Problem:
>
> - Last night the high winds blew the cone shaped cap off the top of
> the flue.
>
> Questions:
>
> - Do I need to replace it?
> - Will any water or snow that gets in the flue cause a problem?
>
> Thanks!
>

For 20 years we had no cap. Then a larger bird set up housekeeping in the
flu and thouroughly plugged it. Fortunately, it was summer and ther was no
need for the flu but as soon as those buggers were gone I cleaned it out and
capped it. It sure would have been easier to have capped before the whole
ordeal.



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