07/08/2026
If you've heard the terms HRV, DVS, or positive pressure ventilation and wondered what they actually mean, you're not alone.
Most homeowners just want to know one thing: will it fix the damp, cold air making my family sick? Here's a plain-English breakdown, with a specific look at what it means for homes across the North Island's damp winters and coastal humidity.
Positive pressure ventilation is a whole-home system that pushes warm, filtered air from the roof cavity into your living spaces, forcing damp, stale air out through gaps in doors and windows. It runs 24/7, reduces condensation and mould risk, and is one of the most affordable long-term fixes for da...