Though do bear in mind that even coagulating your wet rooms, you still need supply points that are far away; let's say you designed your house like a cartwheel which kitchen and bathroom central and stack atop each other, you'd still need long ducts along the spokes to the rim where the supply points are.. I.e. A certain extent of ducting you can't get away from.. Though if fresher principles are to be believed, maybe they're unnecessary.

I have to say, gut feeling for me is to either back up VH's claims on freshR, or to say that traditional MVHR layout patterns aren't too important; the house I'm in now is fully ducted for MVHR but I haven't yet installed the roof vents so I don't have the mhr active. I'm not noticing any serious IAQ issues. Meticulously installed AT too, and there are very few draughts (though I haven't done a blower test yet, maybe there really is a gaping hole in the roof.. But then again the electricity bill is 20 quid a week in the current cold snap, and it's providing all energy to a house 5 times the size of the flat I formerly lived in, for half the price, so I probably got something right..). I'm still keen to install it, but I'm starting to think that FreshR's reliance on diffusion gradients would actually be very effective in the right house configuration