04205381 is referenced by 72 patents and cites 6 patents.

Electronic processing means, in combination with dedicated sensing apparatus is used to control the operation of an HVAC system which regulates the temperature in one or more temperature controlled spaces. The electronic processing means and associated sensing apparatus being readily adapted to existing HVAC systems through interface apparatus installed in each of the existing HVAC control lines associated with the HVAC sources of mixed air, hot air, and cold air, to provide selective actuation and modulation of the discharge air temperature from each source, individually or in combination, in response to sensed HVAC parameters including source discharge temperatures, space temperatures, outside air temperature, and the relative humidity of the outside air and return air from the spaces.

Title
Energy conservative control of heating, ventilating, and air conditioning (HVAC) systems
Application Number
5/829379
Publication Number
4205381
Application Date
August 31, 1977
Publication Date
May 27, 1980
Inventor
David M Healey
Feeding Hills
MA, US
William W Bitterli
Simsbury
CT, US
John E Games
Granby
CT, US
Agent
Dominic J Chiantera
Assignee
United Technologies Corporation
CT, US
IPC
G06F 15/46
F24F 3/00
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