The Broan QT2000 Quiet Hood 42 in. Convertible Range Hood was developed with the patented air chamber designed to reduce noise up to 40% over conventional hoods. Designed for venting or non-venting installation, it comes with pre-drilled holes for your convenience. With a 220 CFM fan, this range hood operates at a quiet 4.5 sones while removing smoke and cooking odors from the air. The range hood uses 2 incandescent lights that have 2 settings and a night-light feature for added safety (bulbs not included).