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Ehrlich P.,Building Intelligence Group LLC
Engineered Systems | Year: 2014

There are several products on the market that provide for a less expensive retrofit from pneumatic to DDC. These typically involve a replacement pneumatic thermostat that has some wireless capability to allow for remote monitoring and set point adjustments. There are many benefits to retrofitting to new DDC. These include improved operations, improved box efficiency, and improved system efficiency. DDC retrofit does not allow for monitoring and control of the box volume and that the pneumatic volume regulator still remains in place above the ceiling. When approaching controls retrofits for existing VAV boxes, one really needs to go into it with a systems perspective and have a plan to repair, or replace, boxes as part of any controls upgrade.

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