2 new stoves fitted, one smoking

morebabies

Hi
As per title, we have just had 2 stoves fitted, stove 1 we fitted is a non boiler model with hotplates and has a twinwall external flue connected to it. This was fitted about 2 weeks ago and worked perfectly. The flue goes up the gable wall of the house and clears it by 600mm.

Stove 2, the boiler model was fitted and plumbed in 2 weeks later, this is in a room down the corridor and goes up the main chimney of the house with a flexible flue, about 20ftin distance from the other external flue. It works perfectly too.

So we tried to light the 2 the last couple of days and stove 1 just puffs all the smoke back into our sitting room in a steady flow now . What have we done wrong? I should clarify that the smoke is mainly exiting through the top air vents of the stove, literally just pouring into the room since stove 2 was installed.

Any advice would be much appreciated.

Dtp1979

morebabies wrote: »

Hi
As per title, we have just had 2 stoves fitted, stove 1 we fitted is a non boiler model with hotplates and has a twinwall external flue connected to it. This was fitted about 2 weeks ago and worked perfectly. The flue goes up the gable wall of the house and clears it by 600mm.

Stove 2, the boiler model was fitted and plumbed in 2 weeks later, this is in a room down the corridor and goes up the main chimney of the house with a flexible flue, about 20ftin distance from the other external flue. It works perfectly too.

So we tried to light the 2 the last couple of days and stove 1 just puffs all the smoke back into our sitting room in a steady flow now . What have we done wrong?

Any advice would be much appreciated.

Are there permenantly opened vents fitted in both rooms?

morebabies

Dtp1979 wrote: »

Are there permenantly opened vents fitted in both rooms?

Yes but I can check they haven't become blocked. Why?

morebabies

Also could it have anything to do with a change in wind direction. The wind seems to be coming from a northerly direction the last couple of days and this flue is on the north-facing gable of the house

Robbie.G

morebabies wrote: »

Hi
As per title, we have just had 2 stoves fitted, stove 1 we fitted is a non boiler model with hotplates and has a twinwall external flue connected to it. This was fitted about 2 weeks ago and worked perfectly. The flue goes up the gable wall of the house and clears it by 600mm.

Stove 2, the boiler model was fitted and plumbed in 2 weeks later, this is in a room down the corridor and goes up the main chimney of the house with a flexible flue, about 20ftin distance from the other external flue. It works perfectly too.

So we tried to light the 2 the last couple of days and stove 1 just puffs all the smoke back into our sitting room in a steady flow now . What have we done wrong? I should clarify that the smoke is mainly exiting through the top air vents of the stove, literally just pouring into the room since stove 2 was installed.

Any advice would be much appreciated.

More than likely it's a ventilation problem you have.
Did your installer explain all and carry out a smoke test a draft test and ensure all ok before you parted with money.

Try it with a window open if it doesn't smoke the room needs ventilation
Is there a extractor fan in the room if so it could be sucking down the smoke from flue.
Is there sufficient updraft

morebabies

Robbie.G wrote: »

More than likely it's a ventilation problem you have.
Did your installer explain all and carry out a smoke test a draft test and ensure all ok before you parted with money.

Try it with a window open if it doesn't smoke the room needs ventilation
Is there a extractor fan in the room if so it could be sucking down the smoke from flue.
Is there sufficient updraft

Thanks, it didn't smoke when first installed and worked fine for 2 weeks. But now it's smoking even with Windows open. No extractor fan in room.

Calahonda52

my guess the stack is cold and cold air falls down and pushes the smoke out.
What I do before I prep the fire after a long break is burn a single sheet of paper in the heart with the doors open.
I also have a gas blow lamp which I sometimes use to shove a blast of hot air up the flue.
The above assumes the flue is not blocked by migrant birds

Its also possible as intimated above that its a air supply problem that was made worse by blocking the other chimney

morebabies

Calahonda52 wrote: »

my guess the stack is cold and cold air falls down and pushes the smoke out.
What I do before I prep the fire after a long break is burn a single sheet of paper in the heart with the doors open.
I also have a gas blow lamp which I sometimes use to shove a blast of hot air up the flue.
The above assumes the flue is not blocked by migrant birds

Its also possible as intimated above that its a air supply problem that was made worse by blocking the other chimney

Ok we're just experimenting now and have lit paper for a few mins, and now we have the fire established there's no smoke. So it sounds like you're right. What's the name for this problem and is there a longer term solution?

Calahonda52

Glad to point you in perhaps the right direction.

No non tech solution unless u can keep the stack warm which is impossible.
I presume it has a "hat" of some description on it.

I have this issue all the time with a conventional chimney when not used, I open the doors of the stove and shove in my hand to feel which way the air is moving, if I feel the cold air coming down, then either paper or the blow lamp, (I have one from my plumbing box)
( similar to this
http://www.calorgas-heaters.co.uk/Gas-Torches/Campingaz-THP-3000-Blowlamp/p-23-287/
Of course I leave it out for the grand kids to play with,10, 6, 3 ...:) much better than a box of matches:

Maybe folk who have the double skin SS flue external stacks could help with their experiences, there is no doubt that it will chill quicker than a big stone one