It is quiet and energy efficient It is quiet and energy efficient. There is no noticible rise in my electric bill. I keep it on auto, 24/7, and that is perfect for me. I have allergies and the sneezing is significantly reduced from several times a day to just two or three. Living in a split level home had me questioning if it would work well, but it fulfills it's duty to clean the air. Love it!

Nice, quiet unit I have not had the product long but so far I like it. It’s incredibly quiet and I believe I notice a difference in the air quality. I like the variable fan speed and auto options. I did not rate 5 stars because I am disappointed that I can not replace the UV-C bulb. From my understanding, UV-C is only effective for a limited number of hours. I was told by their customer service that the bulb would last 7 years. Is that 7 years of continuous use? How many hours before the efficacy wanes?

I really love this product...example..I… I really love this product...example..I was telling my sister how well it automatically cleans the air, when my son came home from work , took his work boots off and set them beside the Sans...long story short..the machine went bezerk...blue light turned red and fan turned up on high..when the laughter from all subsided he decided he should clean his boots before coming in the house..lesson learned..well done Sans....well done :)

I love my Sans! I love my Sans!! I have multiple health issues. Finding something that actually helps me is a real blessing!! My cat and I both breathe much better now.

I've left an earlier review and as an… I've left an earlier review and as an additional piece of information, buyers need to be aware that they need to save the box and all packaging if they want to return the Sans for a refund. I was confident after reading so many glowing reviews and I didn't save the packaging. I'm out of luck. Additionally, the company has deleted my Facebook review. I'm very suspicious of the 5 Star reviews on their site.