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How old is Washington State VIAQ code?

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Specifically, the requirement to have some type of automatic air exchange method available. I ask because I had a 1994 townhouse today, unitary electric heat. It had vented windows but no timer for the bigger and quietest fan (or one anywhere else). I think (maybe?) it had been replaced by this 60 second timer when the bathroom was re-fitted.

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Does that look like a 1994 device? Anyway...it seemed odd to have the small vents at the windows, but no daily timer.

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I ended up finding my my own answer. Basically all new homes built in WA since July, 1991 require some type of automatic system. There's an interesting little study at ...

http://www.nwcouncil.org/energy/rtf/sub ... Report.pdf

I'm now more certain the timer was incorrectly replaced and should be "repaired" rather than "improved".

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