A+ on the filters idea... the biggest thing you'll notice is sampling someone else's cannabis after a month of high-micron filtered of your own. Wow...Cleaner? Possibly, but my girl used to suffer from CHS, so what goes in and on the plants is minimal to start. Nothing but a light-ish dose of Megacrop, pH down, and calcium hypochlorite pool shock for sterility. No sprays other than water if necessary either...
But I'll admit I haven't installed the Merv13 filters over the intake vents yet. I'll have to do that, and see how different it ends up!
I think my lungs are just sensitive, maybe greedy at times, after years of cigarettes and weed smoke. Thankfully I quit the cigs a little over a year ago, so they just have to deal with the weed now. Once I find a good edible recipe though, I'll be slowing down the puffing too.