Damp Bungalow

[Potatoman]

Hi I have a 85sq m Bungalow which is pretty well sealed up, so consequently got mould problems. Thinking about getting some window vents fitted and a PIV system, what does anybody think of these, whats a good make to get, should I get one with a heater in or not, are they expensive to run with a heater in. anything I have missed ?Thanks in advance

[JohnMo]

You can either suck air from the loft and blow out of room vents, or suck in through room vents and blow out of wet rooms. I prefer the later but either will work. PIV may be easier to install.

 

But either way I would want it humidity controlled to limit ventilation when possible. So fan humidity controlled and room vents the same. This way you only really ventilate where it's needed.

 

So if PIV, find one with humidity control of fan speed 

 

Or dMEV fans in wetrooms only, something like Greenwood CV2 or CV3.

[Iceverge]

Suck out of your can. 

 

Replacing bathroom fans with dMEV like John said is the easiest and cheapest. 

 

You probably have loft space for a centeralised MEV system or maybe even a MVHR if you want to go all in. 

[Potatoman]

Hi, been talking to Vent Axia about their centralised MEV system and they have said I need to get somebody to survey the bungalow  as you need to measure duct length and pressure build up, etc to get the correct system for the job, is this correct. Or is there a better way to tailor the system to the house.

[Potatoman]

Anybody?

[JohnMo]

Plenty of companies do MEV. You want one that automatically adjusts fan speed for humidity levels with extract vents that open and close automatically also. Then couple that with humidity activated inlet vents either in window or through wall.

 

Do some reading via Google 

Passivent, Deco, to name a couple.

 

You need to have air movement with cross ventilation dry areas to wet and out the house. To allow this you also need door under cuts or through wall vent grills.

 

I would keep it simple and do dMEV, with all the features mentioned above.