Pacemaker1000

Luckily got a guy in the area and came around straight away. recommended extending external flue by 1m and removing the two internal elbows. ordered and should be fitted tomorrow so fingers crossed 🤞

A taller flue is definitely worth trying. Neighbour has almost identical layout, only difference is their extension has a flat roof. So although total flue height is the same it has a lot more room beneath and around it.

thanks, I’m thinking it’s worth trying removing what looks like a 50cm section and replacing it with a 1m one and maybe a anti backdraft cowl

I’d say from top of stove, and it’s a tall stove, just under 4m

It’s not even that but it is 2’ higher than the roof it’s installed in and 10’ away from main house (with window it). To clear the main house roof stack would need to be over 20’ high!

Hi guys and thanks again to all of you. at their closest the distance between the flue and gutter overhang is 10’4” here is a better angle photo showing flue is 2’ so on the minimum of requirements cheers

It’s on an extension roof over 10’ away from main building and 2’ above that

Thanks, that’s very helpful need to research how easy it is to insert an extension piece. Looks from pics it’s just spring jubilee clamps, but probably not that easy…lol

It was installed by previous owners so no certificate there is a room seal kit fitted but on examination there are small gaps but 99% air comes from outside. only happens on windy days

CO2 alarm never gone off. Could opening a window 4m from stove by just an inch let enough extra oxygen to quickly restart the stove which is setup to draw external air??

Yes the extension is well sealed. Doesn’t have any opening windows just opening velux roof ones. room is open into two other rooms i doubt opening the roof vent would suddenly allow more oxygen to reach fire especially as it happens when room vent was blocked off and only using external vent? but it would allow for pressure balance I expect. had much success tonight with roof vent only cracked open so what creates pressure difference and will a new cowl help? thanks

If there was a lack of oxygen wouldn’t it die out gradually not stop immediately?

3.5m

What type of cowl worked? seen one which spins according to direction of wind

Sorry no to what? Fail to see how it can have more air? Room is huge, vent straight in via duct