Chimney flue

Squatman

Hi guys, looking to buy a stanley cara insert stove, and have noticed that my current chimney isnt straight up. It appears to be approx 6" clay flue. What can i do to insert a stainless flue since mine isnt straight?

Thanks anmillion Guys.

upupup

Squatman wrote: »

Hi guys, looking to buy a stanley cara insert stove, and have noticed that my current chimney isnt straight up. It appears to be approx 6" clay flue. What can i do to insert a stainless flue since mine isnt straight?

Thanks anmillion Guys.

You can get bends @45 and 90 or you can use a flexi flue

Squatman

upupup wrote: »

You can get bends @45 and 90 or you can use a flexi flue

Can you use a flexi flue on the full length of the chimney?

upupup

Squatman wrote: »

Can you use a flexi flue on the full length of the chimney?

Yes you can and there will be less joints that can leak and cause trouble.
Don't connect the flexi flue directly to the stove,you need 1ft or 2 of steel pipe from the stove and connect the flexi flue to that

bfclancy

whats wrong with the chimney, why do you need to line it

Squatman

bfclancy wrote: »

whats wrong with the chimney, why do you need to line it

Seems to be the thing to.. I think its part of building regulations

bfclancy

Squatman wrote: »

Seems to be the thing to.. I think its part of building regulations

is it really, can anyone confirm, ridiculous if it is, sounds more like stove suppliers trying to rip people off by telling them require a chimney liner when they don't

Squatman

it probably makes sense from a chimney cleaning point of view,, that it would stop soot going into the back of the stove

bfclancy

Squatman wrote: »

it probably makes sense from a chimney cleaning point of view,, that it would stop soot going into the back of the stove

this makes no sense, how does fitting a liner inside the existing flue prevent soot getting into the stove, tell them you don't need a liner and save yourself a pile of cash

somofagun

See this happening alot up north here to. Stove shops are making a fortune selling these liners even though thy are not required. I would only line an old flue that you know has a problem with it, if its a flue larger than 6" then pulling a liner through it is not good enough you really should fill the gap around the liner with a vermiculite dry mix.

Squatman

bfclancy wrote: »

this makes no sense, how does fitting a liner inside the existing flue prevent soot getting into the stove, tell them you don't need a liner and save yourself a pile of cash

if you have a 4" stove pipe, going into an 8" flue, then the soot will fall around the outside. thats how it makes sense, but thanks for clarifying bfclancy

upupup

bfclancy wrote: »

is it really, can anyone confirm, ridiculous if it is, sounds more like stove suppliers trying to rip people off by telling them require a chimney liner when they don't

The problem is creosote.It forms in clay flue pots that are connected to stoves and if its not cleaned regularly you have a fire hazard.
Lining the chimney solves this problem.
https://www.mychimney.com/blog/what-is-creosote-and-should-i-be-concerned-about-it/

bfclancy

Squatman wrote: »

if you have a 4" stove pipe, going into an 8" flue, then the soot will fall around the outside. thats how it makes sense, but thanks for clarifying bfclancy

Put in a reducer reduces the flue down to the size of the pipe coming off the stove

Squatman

somofagun wrote: »

See this happening alot up north here to. Stove shops are making a fortune selling these liners even though thy are not required. I would only line an old flue that you know has a problem with it, if its a flue larger than 6" then pulling a liner through it is not good enough you really should fill the gap around the liner with a vermiculite dry mix.

how could you tell the vermiculite has reached all the way to the bottom? is it okay to stuff the bottom of the chimney with fiberwool to prevent the vermiculite falling around the stove?

whizbang

The reducer should be an airtight fit into the existing flue. Otherwise you totally defeat the advantage of a stove by having warm room air still going up the chimney.

Forget vermiculite, there's no hope of getting a good fill. Even if you do, the lining is going to be touching the flue wall most of the way up, so at best half of the diameter will be filled.

dathi

bfclancy wrote: »

is it really, can anyone confirm, ridiculous if it is, sounds more like stove suppliers trying to rip people off by telling them require a chimney liner when they don't

taken from the building regs part j TGDs

2.3.1 Flue size: Flue sizes should be at least:

(a) for connecting flue pipes, equal to that of the flue outlet on the appliance;

(b) for chimneys, at least the size shown in Table 2, but never less than the size of the flue outlet on the appliance or that recommended by the appliance manufacturer

so if the stove manufacturer says in there instillation manual that the chimney must be lined then to comply you have to line the chimney

upupup

Squatman wrote: »

how could you tell the vermiculite has reached all the way to the bottom? is it okay to stuff the bottom of the chimney with fiberwool to prevent the vermiculite falling around the stove?

Fiberwool is fine to use and vermiculite is not essential.Vermiculite is a good idea if you have a big old chimney that may get very cold.Flexi flue on its own is fine for a modern chimney in ireland

Squatman

upupup wrote: »

Fiberwool is fine to use and vermiculite is not essential.Vermiculite is a good idea if you have a big old chimney that may get very cold.Flexi flue on its own is fine for a modern chimney in ireland

how new is a modern chimney? my house is 40 years old (i have the vermiculite, so il use it, but just curious.

upupup

Squatman wrote: »

how new is a modern chimney? my house is 40 years old (i have the vermiculite, so il use it, but just curious.

You may as well put in the vermiculite if you have it.
The old cold chimneys I mentioned would be the ones without any flue.My house is about 70 years old with a flue.I put in a flexi flue without vermiculite or perlite about 6 years ago and no problems and very easy cleaning.
Another problem with leaving out the flexi flue is creosote dripping on your stovehttps://www.boards.ie/vbulletin/showthread.php?t=2058049520

make sure all female/male steel joinings are facing the correct way so any rain flows into the stove and not down the outside of the joiner pipe

bfclancy

dathi wrote: »

taken from the building regs part j TGDs

2.3.1 Flue size: Flue sizes should be at least:

(a) for connecting flue pipes, equal to that of the flue outlet on the appliance;

(b) for chimneys, at least the size shown in Table 2, but never less than the size of the flue outlet on the appliance or that recommended by the appliance manufacturer

so if the stove manufacturer says in there instillation manual that the chimney must be lined then to comply you have to line the chimney

i don't know how you extrapolated that from that. if he's putting a five/six inch outlet pipe into a probably nine inch flue, he's complying. Its a money racket and people like you are enabling it

Wearb

bfclancy wrote: »

i don't know how you extrapolated that from that. if he's putting a five/six inch outlet pipe into a probably nine inch flue, he's complying. Its a money racket and people like you are enabling it

MOD NOTE. ANY MORE UNCIVIL RESPONSES LIKE THAT WILL EARN YOU AN INFRACTION.