Filter out contaminants, chemicals and more with these expert-recommended water filter pitchers and dispensers, including ...

Two brothers and Indian Hill High School students started their own nonprofit in an effort to clear their community tap water of 'forever chemicals.' ...

An air purifier adds an extra layer of protection to your indoor space, giving a better safeguard when it comes to dust, ...

Learn More › There is no underestimating the importance of a great backpacking water filter. Out in the backcountry, a clogged filter could mean the difference between a bout of Giardia and getting to ...

Depending on the MERV rating of the house air filter (which measures how well a filter removes particles), it may even be able to trap viruses and other microscopic debris. By removing ...

The best air purifiers, based on our lab and in-home testing. Whether you need one to clear out smoke, pet dander, or any other unpleasant odors, we have a recommendation for you.

A great air purifier will improve the air quality in your home quickly, without being too noisy or using too much energy. Our tests measure all of these features. Poor-performing models will be ...

pyfda is a tool written in Python / Qt for analyzing and designing discrete time filters with a user-friendly GUI. Fixpoint filter implementations (for some filter types) can be simulated and tested ...

Lenses are precious, fragile, and often expensive – and if something has to get cracked against the ground, wouldn't you rather it was a $20 filter than the front element of a $1,000 lens? Yep.