galleon87

Thanks again. I am replacing all windows and doors now plus the external wall insulation and floor insulation. Can you advice where i can get the design done i.e what kind of ducting to run, manifolds, silencers etc. where to locate the vents?

Can I run the ducting now, and then do airtightness test to decide MEV or MVHR?

Thanks for your reply. Considering the house is currently totally stripped, I need to run the ducting soon. Would it be different ducting for MEV and MVHR?

Hi I am in a process of full renovation of a 1930s semi. all walls stripped to brick, external wall insulation, 150mm insulation between joists and 6 m rear extension. I am thinking of installing a MVHR. The question is, is it worth it for an old house? If yes, where can I get the design done? Don't mind if it is a paid design. Thanks