Building ventilation system

Abstract

The invention describes a ventilation system for a building. The ventilation system compares interior air with exterior air and exchanges the air when needed. Measuring both interior and exterior air increases energy conservation and reduces the likelihood of harmful contaminants in the building.

1 . A ventilation system for a building comprising:
 a. at least one fan for directing air flow,   b. at least one sensor capable of providing at least one interior input and at least one exterior input, and   c. a controller that operates the fan when the interior and exterior inputs exceed a differential.   
     
     
         2 . The ventilation system of  claim 1 , wherein the fan is selected from a group consisting of an intake fan and an exhaust fan. 
     
     
         3 . The ventilation system of  claim 1 , wherein ventilation system includes a plurality of fans. 
     
     
         4 . The ventilation system of  claim 1 , wherein the fan is mounted in a fan duct. 
     
     
         5 . The ventilation system of  claim 1 , wherein the ventilation system includes a plurality of ducts. 
     
     
         6 . The ventilation system of  claim 4 , wherein the sensor is mounted in the fan duct. 
     
     
         7 . The ventilation system of  claim 1 , wherein the ventilation system includes a plurality of sensors including at least one interior sensor that provides the interior sensor input to the controller and at least one exterior sensor that provides the exterior sensor input to the controller. 
     
     
         8 . The ventilation system of  claim 1 , wherein the sensor provides the interior sensor input and the exterior sensor input by shared sampling. 
     
     
         9 . The ventilation system of  claim 1 , wherein the sensor is selected from a group consisting of a humidity sensor, radon detector, temperature sensor, allergen detector, pollutant detector, carbon monoxide detector, hydrocarbon detector, and combinations thereof. 
     
     
         10 . The ventilation system of  claim 1 , wherein the air flow produced by the fan is reversible. 
     
     
         11 . The ventilation system of  claim 10 , wherein the direction of air flow determines the interior input and exterior input to the controller. 
     
     
         12 . The ventilation system of  claim 1 , wherein the ventilation system includes redundant sensors to ensure reliable operation. 
     
     
         13 . The ventilation system of  claim 1 , wherein the controller monitors resonance and dissonance attributes. 
     
     
         14 . The ventilation system of  claim 13 , wherein the controller algorithmically manages resonance and dissonance attributes to improve operation. 
     
     
         15 . The ventilation system of  claim 14 , wherein the operation may be improved by varying signal conductance in tandem with impedance variations. 
     
     
         16 . The ventilation system of  claim 1 , wherein the controller includes a group consisting of a programmable microprocessor, a peripheral, memory, communications media, a logging device, and combinations thereof. 
     
     
         17 . The ventilation system of  claim 1 , wherein the controller is programmed to improve power characteristic of the fan. 
     
     
         18 . The ventilation system of  claim 17 , wherein power characteristic is selected from a group consisting of current, voltage, and the product of current and voltage. 
     
     
         19 . The ventilation system of  claim 17 , wherein the fan has an acoustic signature and at least one sensor input acquires the acoustic signature of the fan. 
     
     
         20 . The ventilation system of  claim 19 , wherein the fan is operated at the acoustic signature with a lowest decibel reading.