News

ACEEE Summer Study on Energy Efficiency in Industry


Digi RTU Optimizer Case Study: New Technology to Maximum Energy
Efficiency

The Digi RTU optimizer is a proven new technology for roof top unit (RTU) air
conditioners. The Digi RTU Optimizer utilizes one variable frequency drive (VFD), to control
both fan and compressor speed on the RTU to which it is installed. As an after factory addition it
is a perfect fit for the multitude of existing inefficient RTU’s that are currently in the market. The
fact that it only takes one drive to control two components keeps the cost relatively low and
minimizes the concern of having multiple drives on one RTU. The Omaha Public Power District
(OPPD) reviewed the product and concurred that it performed as the manufacturer said it would
and that it was unique to the industry. The utility then proceeded to initiate their pilot to test
performance and public acceptance.
Link:ACEEE OPPD

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