I would like to hear why you think it is useless.

I am keeping windows open throughout most of the year in my bedroom but in
winters and during really hot summer days the rest of the house has closed
windows. The new house will be even more sealed due to the more careful
construction process and either spray foam or sealed (for vapor barrier)
sheetrock. I cannot imagine only removing air from bathrooms and kitchen;
it seems to me like a source of fresh is not only needed but also a must.
There will be an AC fresh air inlet but A/C will be installed only on the
second floor + I will only use it some 4 weeks of the year. HRV seems like
a good contender here.

wrote in message
...
Abby Normal wrote:

If you are going to be thoroughly sealing the house, then an HRV scheme
sized roughly for 0.3 air changes an hour would give good IAQ, without
creating drafts or depressurizing the home.

Quite useless compared to an exhaust fan for a US house, IMO.

Nick