Maximum length of vitreous enamel pipe

[sirihi]

I've read elsewhere online that the vitreous enamel pipe connecting a stove to a flexible flue liner should not be longer than somewhere between 1-2m (depending where you read). This is to prevent excessive heat loss in the flue gasses and is apparently a sensible recommendation rather than a regulatory requirement.

I have an unusually high inglenook fireplace where the distance from the top of the stove to the top of the inglenook opening is around 3m. Should I insert a section of twin-wall flue between the vitreous pipe and the flexible flue liner or run it all in vitreous pipe?

 

[KenGMac]

sirihi, good evening.

By no means am I an expert on such topics, but looking at things logically, a lot will depend on vertical distance between fire and chimney terminal?

I have seen some horror stories as regards flue gas cooling within even a steel commercial oil system, because the design and flue temperatures were wrong.

Ken.

 

[foxhole]

I've read elsewhere online that the vitreous enamel pipe connecting a stove to a flexible flue liner should not be longer than somewhere between 1-2m (depending where you read). This is to prevent excessive heat loss in the flue gasses and is apparently a sensible recommendation rather than a regulatory requirement.

I have an unusually high inglenook fireplace where the distance from the top of the stove to the top of the inglenook opening is around 3m. Should I insert a section of twin-wall flue between the vitreous pipe and the flexible flue liner or run it all in vitreous pipe?

So your ceiling height is over 3m?

 

[sirihi]

Thanks for your replies. Yes we have very high ceilings... 3.8m!

I've spoken to a stove retailer and they recommended I go with maximum 1.4m of vitreous pipe and then convert to twin-wall before connecting to the flue liner.