Patent ID: 9506668
Filing Date: 2016-11-29
CPC Classification: F24F

Claim Text:
1. A system capable of reducing negative pressure within a space receiving air through an intake duct and exhausting air through an exhaust duct coupled to an exhaust device configured to exhaust air from the space, the system comprising: a make-up air system is configured to be installed within a structure, the make-up air system being operatively connected to the intake duct to selectively permit supplemental air into the intake duct; and a pressure switch configured to sense a pressure change within the exhaust duct upstream of a dampening feature of the exhaust duct reducing pressure changes originating downstream, wherein the pressure switch is configured to be retroactively coupled to one of the exhaust duct and the exhaust device; wherein the pressure switch is configured to communicate an activation signal to the make-up air system to permit supplemental air into the intake duct when a pressure change within the exhaust duct indicative of an exhaust rate exceeding a pre-determined threshold is detected, wherein the pressure switch is configured to communicate a deactivation signal to the make-up air system to restrict supplemental air into the intake duct when a pressure change within the exhaust duct indicative of an exhaust rate below a pre-determined threshold is detected.