I have removed some of the glazing beads on 1 window before deciding whether to do a trial replacement of one 28mm unit. The picture shows the black corner of the dg unit and a surprisingly large empty space. The plastic strip immediately to the right of the unit creates a slot that the beading fits into - the gap is 10mm here and about 15mm behind that. So essentially there is a 15mm gap nearly all around the window. It is quite damp underneath and I would imagine remains damp for long periods in winter. So do I

1/ Spray some low expanding PU foam into this gap and see if that helps
2/ Replace unit with a newer Low-E, warm edge unit (+correctly measured)
3/ 1 and 2

Note this is a small unit, and replacement won’t be too costly. However there are 12 other similar units, so I would like to get good method with this one. The foam is still compressible when set, so I don’t think expansion would be an issue but not sure about issues with damp?

Hope nobody minds my resurrecting this topic as it seems to fit my bill...

I am looking to reduce the speed of my 60-watt AC wall fan, as it makes too much noise (i.e. pre-divorce level, apparently...).

Previously I bought a similar product to THIS...
https://www.amazon.co.uk/LumenLite-Variable-Speed-Controller-Hydroponics/dp/B075837XYX/ref=sr_1_11?ie=UTF8&qid=1514946151&sr=8-11&keywords=variable+fan+speed+controller

but it burned out after a few weeks, and in any case it did not provide proper variation (only in the last 10 per cent of the range...) as it was rated from 0 to 250 watts (I think...)

I want to avoid chucking good money away after bad (NY resolution...), not to mention fires, writs etc.

Here is a photo of my fan, it is in the kitchen window and is used to scrounge solar gain !
(it actually works...) (when the plug has not been ripped out, that is...).

Thanks as usual for any/all comments or assistance,

gg

Er, thanks for that, but I already have a condensing tumble-drier !

Yes, we get lots of pure water out of it, for feeding the electric iron and plantsetc.

I also don't have condensation or mould.

As stated, the purpose of the fan is to scavenge heat out of the window area, for distribution around the house.

Thanks for the comments !

gg

Ha ha !

Well, DJH, I was going on the title - "Ventilation solutions for a gradual eco-renovation"
(the thinking being that ventilation means "carrying of air"... which is all that I'm trying to do in my "gradual (but drawn-out...) eco-renovation !

still no nearer to this particular solution, I fear...
(still, there's hope...)

Happy New Year to you !

gg

A condensing tumble drier is not a ventilation solution for a house.