Postive Input Ventilation or extractor fans

rob7475

donmaico said:

rob7475 said:

I've fitted a PIV unit in our house which has cured our condensation problems. The one I have is a nuaire drimaster which was easy to install myself. You do ideally need extractors in the kitchen and bathroom too though. You also need to make sure the PIV unit is sited centrally in the house and doors are left open a bit to allow air flow.

Yes I did wonder that as the extractor fans would provide an exit point for the damp

It's because a PIV alone wouldn't cope with the quick build up of condensation in a bathroom or kitchen. They're definitely a worthwhile investment though - they cost pennies to run compared to a dehumidifier and require very little maintenance apart from filter changes every few years (nuaire recommend changing filters every 5-7 years but I've had to change ours after 3 as the loft is very dusty).

donmaico

neilmcl said:

donmaico said:

neilmcl said:

donmaico said:

neilmcl said:

PIV are pretty good things but I'm not sure how much they'll help in an enclosed, downstairs cloakroam where condensation is almost inevitable in an older property with cold solid walls. Do you have any heating in the room?

no its very small and we would only be able to fit a radiant heater , in fact i got a quote to fit one but thought that would not remove the problem of condensation 

Just to be clear is it a cloakroom as in WC or an actual cloakroom for coats/shoes etc?

It's a WC

Can you install a small towel rad and extractor fan?

not enough space .A small, slim radiant heater attached to a wall is about as large as I can get fitted

donmaico

rob7475 said:

donmaico said:

rob7475 said:

I've fitted a PIV unit in our house which has cured our condensation problems. The one I have is a nuaire drimaster which was easy to install myself. You do ideally need extractors in the kitchen and bathroom too though. You also need to make sure the PIV unit is sited centrally in the house and doors are left open a bit to allow air flow.

Yes I did wonder that as the extractor fans would provide an exit point for the damp

It's because a PIV alone wouldn't cope with the quick build up of condensation in a bathroom or kitchen. They're definitely a worthwhile investment though - they cost pennies to run compared to a dehumidifier and require very little maintenance apart from filter changes every few years (nuaire recommend changing filters every 5-7 years but I've had to change ours after 3 as the loft is very dusty).

and presumably they draw clean air via the soffit boards?