Thanks to the two people who have replied.
It seems from what you say that increasing from 5 inches to 7 inches is OK. The flue I will use is 7 inch Selkirk twinwall outside flue but I haven't yet found an increasing adapter in the UK to convert from the 5 inch wood burner outlet pipe to the...
My wood burner outlet is 5 inches and I understand the stainless twinwall flue needs to be 6 inches to comply with current regulations and that an easily available increasing adapter will accomplish this satsfactorily.
My question is - is it possible to use a 7 inch flue with this stove? If...