The boards are said to last 3-5 years with everyday use, sort of like a IPF patient...
It's been my experience if you use one, and only one, every single day, every single puff, it will last about 4 years.
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What a marvel of engineering they are!!!@ 300 puffs per day, 4 years would put you at 438,000 puffs ... I could definitely see some ProVaris going twice that distance.

Does anyone know what the two Provape owners are doing these days?