In message
,
Owain writes
On 29 Mar, 22:03, Tim Lamb wrote:
No extractors. Double glazing has trickle vents. Kitchen has double air
brick but buried behind cupboards. Cooker hood is re-circ type.

Change cooker hood to an extract type (if it's an electric cooker,
wire it into the cooker switch so the cooker can't be used without the
fan.)

Yes. More holes through cavity walls! Might be do-able if there is space
over the wall cupboards for the ducting.

* We were arranging a simple bathroom extractor (timed on exit if
possible) and realised the added expense of part P. One step further to
a heat recovery, low voltage extractor. But are there any *gotchers*?

You might be able to use an in-line duct fan, so taking the electric
bit outside the bathroom.

Yes. That was the electricians suggestion. Suspended for further noise
reduction. Lots of duct but possible. There is a convenient space over
the corridor. Are there rules governing positioning of exhaust ducts
close to gas boiler flues?

regards

--
Tim Lamb