I struggle with a severe susceptibility for fungal infections and also allergies to pollen. The wildfire smoke for the last few summers made it very hard for me to breath, and I would wake up 5-6 times each night with my sinuses totally blocked and coughing. I did a bunch of research into air purifiers to see if I might find a little relief, and saw that many reviews were quite positive. I quickly eliminated the inexpensive purifiers so prevalent in big box stores and online retailers (not enough volume to be effective), and dug deeper into professional grade purifiers. Eventually I settled on Airpura, and purchased three for my 3,600 Sq Ft home. I put a V714 with the Super Gas option upstairs, and the same downstairs in our finished walkout basement, and added a V414 with the same option to my office. These things completely changed my life in two days! I was really skeptical, it was a big investment for us, but it turns out that this was one of the best decisions I ever made. I now sleep through the night, cough is gone, and I have much more energy throughout the day....I really didn't realize how poor sleep was affecting me. We run the 714s on high all night and at 50% power during the day ...they are not loud, but can be a little distracting on high while watching a movie. We also keep our ceiling fans on low all the time to help with air circulation. Our electric bill went up about $9/month, but that's fine given the huge improvement in quality of life. All I can say is that if you, like me, are skeptical, don't be. These things work!