So I've only been able to use this for a couple weeks, and it hasn't been too cold here, but this air purifier is amazing. It has a ton of features that are all beneficial. To start off, the size is perfect for a medium to large room; we have it in our master bedroom, which is about 20 ft by 14 ft and the thing is a beast. It circulates air well and keeps it fresh. It can direct the air flow rather than just spewing it straight up - this one accelerates and provides a nice breeze/air flow. It tells you the air quality as well as the filter quality amongst a couple other settings. I feel like where this purifier will excel is in the winter time - it has a heater function. So not only can I get fresh air - I get warm fresh air. Overall, I love this thing and would highly recommend to anyone!