Stopping draw up chimney

Gryzor

hi

is there a fitting that can be got for a chimney top to stop air being drawn out of the house when no gas fire is not lit but will let out fumes when it is lit.....i noticed during the cold winter months(first winter in house) that the sitting room was noticably colder than the other room in house...there is quite a draw up the chimney...i've half the sunday times up there now but when i do get a gas fire installed this won't be a good option...

thanx

rooferPete

Hi Gryzor,

I know someone had invented a cap for chimney pots that could be opened or closed using a handle beside the fireplace.

I'm not sure they are still around, perhaps if you look up Glorneys or some of the other chimney suppliers they will set you on the right path.

One question that comes to mind is will the gas company commission a fire without a permanent vent ?, the fumes can be very dangerous.

Maybe you could line the chimney and fit a small vent cap to Bord Gais standards, the flue can be as small as 100mm and the cap is about 75mm, it may be the safest route to go.

Gryzor

thanks pete.....safety would obviously be a priority...don't want to go for a permenant sleep on the couch someday.. :eek: must go kick google into action

would something like this sort out or even ease the problem??

rooferPete

Hi,

The cowl is a very nice job but not meant for what I think you are trying to do, try
www.miflues.net and look at their flexible flues.

The same or similar type flues are available from most good plumbing and heating suppliers.

Gryzor

rooferPete wrote:

Hi,

The cowl is a very nice job but not meant for what I think you are trying to do, try
www.miflues.net and look at their flexible flues.

The same or similar type flues are available from most good plumbing and heating suppliers.

are those flexible flues not for enclosed gas and oil burners??? would they work on an open gas fire aswell??

rooferPete

Hi,

Yes they work on open fires, even coal if needed, however I think you are trying to reduce the size of your flue and the capacity to draw the heat from the room.

The 125 mm insert with a small "Gas cowl" should reduce the draw on the chimney but only for use with a gas appliance as the fumes will still have an unhindered outlet.

Smoke is a completely different animal and you need a good draw to pull the smoke (and 80% of your heat) up the chimney.

Also bear in mind that any room with a gas appliance must have a permanent vent installed or Bord gais will refuse to commission the appliance, they will go as far as to terminate your gas supply until the appliance meets their standards.

I don't know where you are living but if you contact an approved installer they will advise you as to the rules and regulations regarding ventilation.

tapest

Also bear in mind that any room with a gas appliance must have a permanent vent installed or Bord gais will refuse to commission the appliance, they will go as far as to terminate your gas supply until the appliance meets their standards.


Hi Rooferpete
Not being cheeky
One exception is "balanced flue" appliances. Not all are wall mounted boilers. I got a sealed fire in one room to duplicate boiler / fire front assembly in another room. the sealed fire draws its air supply from and exausts to the chimney ope.

t

rooferPete

Hi tapest,

No prob I have a balanced flue on one of my boilers actually two now I think about it the gas is balanced flue and grant kero boiler has one, to complete the package I have a grant back boiler LOL it's keeping the options open.

I believe the question was on a gas fire insert, of course the option is open to a closed fire front or even a pellet stove.

What great times we live in with all the options .