FreddyK

Many thanks Nick and Mike. Very useful response. FK

Hi, I am in the middle of house renovation / extension and putting in Ducts to enable MVHR installation at a later stage. Using a design by Bpc and installing myself with help of non specialist contractor. There was one question the Bpc designer was ambivalent about. The open plan living / kitchen area has two fresh air inputs on the sitting area on left side and two extracts on the kitchen area on the right side. There is a vaulted ceiling area that protrudes towards the garden and has a lot of glazing. I can run ducts to the apex of the vaulted ceiling. Should this be an extract to get out all the hot air in the summer (I am concerned it will get too hot in there with a lot of glazing and velux windows) or should it be an air input (which is what Bpc originally suggested and I am concerned if it is an extract it will be too close to the sitting area inputs and will short circuit them). See drawings attached for both options. Appreciate your advice. FK