iistudio: One of my colleaque was asking around for people's opinions on HRV
I will let him know about this.......
Also anyone thinks HRV or DVS system actually
useful or say good for money spend on it?
Yes but it depends on what you are trying to achieve.
HRV & DVS are different technologies both trying to achieve the same thing.
If you have a well insulated house and are trying to manage potential moisture issues then yes go for it. We have a new house and had Smartvent put in to make sure we didn't end up with a damp new house :)