Inventors:
Jacob Y. Wong - Santa Barbara CA
John R. McGibbon - Goleta CA
Assignee:
Gaztech International Corporation - Goleta CA
International Classification:
F24F 1100
Abstract:
An affordable ventilation controller comprises a low cost and very stable carbon dioxide sensor and a remote-controlled louvered suction fan equipped with an air filter. The ventilation controller operates independently of any existing heating or cooling system that might be present in a closed room. The carbon dioxide sensor measures accurately the gas concentration level in parts-per-million (ppm's) as a ventilation index. When a predetermined ventilation index is exceeded indicative of bad ventilation, a remote-controlled suction fan equipped with a louver and an air filter is activated to draw in fresh air from the outside in order to regulate the CO. sub. 2 concentration and provide good ventilation. However, if an exceedingly high concentration of CO. sub. 2 is sensed, the controller inhibits the control signal to the suction fan, since such a high level might indicate the presence of a fire.
