Envirovent ?

Ms_Chocaholic

Hi
weve recently purchased a bungalow and it comes complete with an envirovent system in the loft. Unsure of the benefits at this stage but one huge downside is a vent into the hallway (think larger than a tumble dryer vent hose) blowing cold air into the hall. 

No paperwork but I rang envirovent to find more info but they didn’t install it themselves. 

Any ideas anyone?

Thanks 

FFHillbilly

its called a Positive Input Ventilation system (PIV), and it will pressurise the house by forcing air into it from the loft, so as soon as windows are doors are opened it creates air movement and can help stop damp/condensation problems.
if it's been installed it likely means there was such a problem beforehand so I wouldn't remove it just yet

tacpot12

There should be a heater on the unit, but it can be switched off if the previous owners wanted to do so.  

FreeBear

tacpot12 said: There should be a heater on the unit, but it can be switched off if the previous owners wanted to do so.  

And the heater is left on 24/7, it can add significantly to your electricity bill.

It might be worth looking at replacing the PIV with a MHRV system. Not cheap, but it will recover most of the heat from outgoing air and use it to warm the incoming. So running costs should be lower.