21st-Century HVAC Controls: Progress and Paradox

Sellers, David A.
July 2003
Heating/Piping/Air Conditioning Engineering;Jul2003 Supplement, Vol. 42, p38
Examines the advantages and disadvantages of modern controls technology. Cost of one-pipe pneumatic pipe temperature transmitter; Accuracy of a platinum real time data temperature sensor with transmitter; Precision of a six-inch pneumatic butterfly valve and actuator.


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