Whole house extract ventilation

Currently working a project which needs extract from 5 rooms. 2 bathrooms, a toilet, kitchen and utility room. Fitting individual fans is looking to be quite expensive as opposed to some whole house solutions out there. Question is have you used a whole house system and if so which did you go for? Currently looking at the Domus offering or Envirovent.

Whole house extraction just means one larger ran centrally mounted and ducted to a number of rooms. They normally run all the time at trickle speed with a boost option for when showering or cooking. I have used Vent Axia's offering.

The problem is they still rely on "leaks" or other incidental ventilation like window vents to get air into the house to replace what they are extracting, and they still waste energy because they just exhaust warm air straight outside.

Assuming this is a new house, I would seriously consider proper MVHR (Mechanical Ventilation with Heat Recovery)  This deals with fresh air in, as well as stale are out, and by passing the two through a heat exchanger, most of the heat from the exhaust air is recovered and put back into the fresh air into the building.  You also don't need trickle vents on windows etc.

+1 to MVHR. Warm air extract from bathrooms and kitchen with air in to living areas.