Hi Thanks for ther continued responses
Following up
- I managed to meet two other residents but one was too busy and the other was only happy to check themselves rather than me... (do I look that suspicious.. answers on a post card!??) and all I got was a beige box with no markings
- The flat is not at the top so no access above
- Re the faceplate on the original. All this was was a vent plate from somewhere stuck on with double sided tape so of no help..
- Anthony (and rsgaz)
imensions:
25.5cm square; 20cm between screw fixings (for a front plate); depth 11cm; vent out at the top approx 7x15cm
-AJShep, Greenwood airvac the depth seems too much for this box
-Antony, I tried the PDF but it wouldn't open however, I did re-look at Silavent and a couple of fans looked a possibility however, from what I could see they only had 3 corner fixings (with the vent hole in the fourth corner). I did followup with Domus Ventilation (who now make Silavent) but they couldn't (or wouldn't ) give me the size between the fixings on their models i.e.
Silavent Mayfair 070 series
Silavent Mayfair Classic
-Either way, For these I seem to need a backbox. They used to do one (PFL 420A) which had a side (or top depending on how mounted) which would have possibly done the job however, they stopped doing this and only do the rear vent which is no good here (as confirmed with Domus Ventilation).
All I can think of doing is putting a front panel on the box, find a compromise fan which doesn't stick too far in (and out) and have some ducting to the exit hole at the top (but will look pants)
Thanks in advance for any further thoughts on something I may not be aware of / missed