What’s up DGC. I was recently considering purchasing an air purifier system to help ensure I don’t get pm every once in awhile it seems to pop up and I would really like to buy a unit that could help eradicate the problem. I was looking at a pro guard unit and another unit called airoclean 420. Both units seem to use some sort of photo oxidizing catalyst and UV bulbs but the pro guard unit states that are releases a dry H2O2 into the air to act as an act of cleaning agent where is the arrow clean claims to have zero emissions 0 h202 or ozone. I was wondering if anyone has any experience with them or knows anything about them whether they’re safe or not or actually work thanks again DGC.