Pro Builder's annual Top 100 Products is a recap of the building products readers wanted to know more about during the past year. From windows to water generators, the 100 products and building materials piqued reader interest for innovation, energy efficiency, time-savings, good looks, durability and more. The 2021 list features Zoned Comfort Solutions®, EZ FIT® Recessed Ceiling Cassette, Mitsubishi Electric's high-performance heat pumps and the kumo cloud® mobile app. Each product is accompanied by a description and image.