Vent underfloor to woodburner?

[StephenStephen]

Hi all,

...renovating a bedsit room within a larger property, originally built early 1700's. Rubblestone and cob, engineering brick front skin added later, then covered with concrete render.

Suspended wooden floor in need of board and joist treatment/replacement.

I suspect (not investigated fully yet) that there is insufficient ventilation below floor - only one airbrick apparent in front wall, and concrete based extension built on rear which I suspect covered up previous air brick(s) in rear wall.

I am considering installing a duct from the underfloor space to middle of (yet to be installed) hearth underneath woodburner, in middle of rear wall.

I'm thinking that this will:
-suck air across underfloor from airbrick in winter months, improving underfloor ventilation
-allow me to improve draughtproofing within room, without depriving the woodburner (and me!) of oxygen.
The woodburner will either be 5kw or 6 kw, and the vent would be considerably larger in area than the requirement for additional ventilation for the 6kw in an old house.

My partner, and the woodburner installer we've spoken to seem to share the view that this is unnecessary, a bit bonkers, but won't do any harm.

Any thoughts?

 

[Burnerman]

A grand theory Stephen but unfortunately any air supply to the woodburning stove has to terminate outside the building (although I have seen otherwise).
Best to concentrate on installing more air bricks, I reckon.
John

 

[theprinceofdarkness]

Installing an external air vent is a good thing. One down side is that you will hear more external noise. The other thing is that if there is some other higher level vent (upstairs window slightly open?) then the hot air will slowly drift out via this so heats more of the house. If there is no external vent, you get a cold air flow across your front room floor to the fire which gives a draughty feel to your feet when sitting.
Frank