Vent-Axia loft PIV does the job well.
Having just installed one of the premium Vent-Axia PIV units in a home in Boulevard Hull today, I have to say how much of a breeze the installation was and how good the build quality of this product is. The property was also a recipient of a Vent-Axia Revive 7 Smart exhaust fan at the same time and these are just brilliant too. more about that in a later blog post.