I am part way through extending/refurbishing a 1980's house (including MVHR, improving insulation and airtightness but unlikely to achieve less than 5 m3/hr/m2) and had intended fitting a sub 5 Kw room sealed wood stove for occasional use.
It seems that most supposed room sealed wood stoves have external air supplies/controls that are not sealed from the room and therefore leak room air/heat via the stove/chimney (see Leaky Stove thread)
I am beginning to think it may be better to fit a room sealed lpg stove with a short horizontal balanced flue through the wall (published efficiency figures seem similar) However, woodstove air controls can be closed when not in use which presumably reduces the flow of external and possibly leaked internal air through the stove. The flow of external air into a room sealed gas stove cannot be restricted (although as there is no chimney draw the inflow of external air is reduced?) so the stove will still exert a cooling effect to the room when not in use.
Can anyone advise as to whether a room sealed lpg stove would be better in terms of heat loss (particularly when not in use) than a non room sealed woodburner with an external air supply?
Thanks