Belimo Holding Ag

Hou Yin Chan

Marc Thuillard

Peter Schmidlin

Forest Reider

Stefan Mischler

Ronald Aeberhard

Wee Ming Goh

A method, system (), and a computer program product comprising a non-transient computer-readable medium () having stored thereon computer program code configured to control one or more processors () of a computer () for operating an HVAC installation (), wherein a set of enthalpies (H, H, H, H) and flow rates (&#x3d5;, &#x3d5;) as variables of the HVAC installation () is monitored and used for controlling the operation of said HVAC installation (), comprising the steps of: (a) dividing said set of enthalpies (H, H, H, H) and flow rates (&#x3d5;, &#x3d5;) into a first and second subset; (b) measuring each variable of said first subset with a related sensor () arranged in said HVAC installation (); and (c) determining the variables of said second subset from the measured variables of said first subset by using a mathematical and/or empirical relationship between the variables of said first and second subset.

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Subang Jaya, Malaysia

Hou Yin Chan