Dynamically Balancing (or not) House Ventilation – Bad Idea or Smarter Ventilation?
I’m working on an HRV setup that would potentially react to events in the home, to basically unbalance itself (add makeup air flow).
I realise that an unbalanced core is not as efficient.
I’ve taken a few measurements for example in my own home to find that with a kitchen exhaust running at 160 CFM (measured), the home is being pulled to negative .03 WG…the “recommended” threshold is .025 negative.
Given that I can control the two HRV EC fans independently via 0-10V and that the home is heavily automated, is there any reason not to do this? The idea is to set a baseline for balanced normal (efficient) use, then ramp intake to bring the house more neutral when required only.
The same would apply say when the home is not occupied…the EC motors could be ramped down or turned off. Based on my measurements/calculations we’re needing about 11K BTU per day to compensate for the HRV running at 89% efficiency @ 0 F (-17C) @ 90 CFM.
So smarter ventilation or bad idea?
GBA Detail Library
A collection of one thousand construction details organized by climate and house part