This model services an area of just over 5050 sq. ft.* providing 1 (one) ACH. Full cabinet insulation allows for operation that is quiet in a wide variety of climates. Installation to the air handling system is quick and simple. The by-pass design allows for a portion of air to be diverted from the return air duct, cleaned and entered back into the air circulation. This method efficiently captures air pollution without any risk to the function of the air handling system. The AWW675 can also be installed to run independently.