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Thanks for the info. I'm in a flat, where due to the configuration the ventilation is very poor (all the windows are on side so hard to get circulation. The air just feels really heavy and stale in the flat, and my wife suffers from terrible coughing, nose running, and allergies when ever she's...

Yes, the heat loss is not ideal but hopefully better than my current option which is having the windows open in winter, which still doesn't seem to solve the issue of condensation and my wife's allergies. I'm sceptical as well. Would have gone for a 2 way vented heat recovery system but my flat...

It's not a fan per se but a positive input ventilation system. The idea is it sucks in filtered air from outside, creating positive pressure in the house which pushes the stale humid internal air out through whatever gaps exist in walls/windows/doors etc. Its meant to stop build of condensation...

Ah thanks for that, I really appreciate you digging into the instructions. My fault, I kinda skimmed past and went straight to the wiring diagram!

Thanks much appreciated, yes the instructions are very vauge, the speed boost is controlled internally, and there is no timer, so I'm not sure what the LS is for, apart from jsut been an additional way to turn the device off.

Hi thanks for your reply, I basically want to take from the normal (ring main) wall plug to the switched fused spur and then to the fan. 3A switched fused spur is required, so device can be turned off with the spur. So I have supply of L N (E) that go into the switched fused spur that then goes...

Hi all, I am wiring a Vent axia pozidry fan, and am I right in assuming if the spur I am using has it's own switch, I can just link the L to the LS at the fan? Many thanks in advance. Best, Alex

Thanks for the reply guys. I'll give the hepvo trap a try and also replace the durgo. I'll also run some drain unblocker as well. Hopefully I wont need to install an external vent, but I know internal aav systems dont deal with positive pressure well.

Hi all, Common problem but wonder if any old hands can help me pinpoint the cause. There's a sewage smell in a client's ground floor bathroom, which they say seems to occur when the bathroom is used. (They've gone away on holiday and come back and it smells fine). There is no external vent...

Hi there, I've recently opened up a chimney breast, and installed a lintel to support it. However this revealed an internal brick partition which separates the flue for my fire from the one for the basement below. Is it okay to remove this partition up to the height of the lintel? I can tell...

Hi there, I'm opening up a chimney breast so a hob can be installed inside. I need to open up by around 800mm. The chimney breast is 1600mm wide, so my original plan was to install a 1200 lintel at the height I need, and then remove the single leaf brick facade from below, to create a 800mm...