And I would add that that particular herf cost me a fair chunk of change. My two air purifiers couldn't keep up that day. I recently had a contractor install a powerful fan in the barn to extract smoke very quickly. Unfortunately they also had to install an air intake system at another location upstairs, so the whole barn wouldn't implode when I ran the fan, lol! When I turn on the exhaist fan, the air intake system also turns on to replace the air being removed from the building. And it gets even more complicated and expensive, because the air being replaced is of course cold air (in winter), so they also installed a treatment system to heat that replaced air a bit as it comes into the building if it needs it. It might be an interesting thread to discuss smoking indoors and ventilation/purifiers. In any event, there won't be a smoke issue at the 2018 herf.