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SMUD’s energy-saving guru, Bruce Baccei, discusses ideas for saving energy with your roof-top HVAC units

Add-on Variable Speed Controls for RTUs


DCV, mechanical contractor
In a recent article published at the EnergyCentral website, Bruce Baccei of SMUD’s Energy R&D, discusses a topic that he has devoted years of his professional life to, HVAC efficiency.  In particular Bruce reviews the results of a Sacramento field test on a technology that averaged an energy savings of over 39%.

The addition of variable speed controllers to existing single speed HVAC units has proven to dramatically reduce energy consumption and the technology has other significant benefits. Products like Catalyst, also provide the value of fault detection, measurement of energy savings, adjustment of controls, email alerts, viewing performance and Demand Response all by way of the internet. Read Bruce’s article here.

For more information or an on-site survey showing how Variable Speed Controls, like those discussed in the article, can save your energy dollars contact COAC’s John McAlpine.

Game Changing Technology: Transformative Wave’s Catalyst Roof Top RTU Energy Solution

Catalyst RTU Solution by Transformative WaveMore Than A VFD, Transformative Wave’s CATALYST Verified as Powerful New Way to Save Energy with Rooftop HVAC Units.

Most commercial buildings are cooled by packaged rooftop units (RTUs), but RTUs have a problem: Their fans run at full power, even when cooling demands are low. A few years ago, retrofit kits – like Catalyst – hit the market. These kits enabled building operators to upgrade their existing single-zone RTUs to variable-air-volume operation with claimed HVAC savings of 25 to 50 percent.

Originally, these claims were greeted with much skepticism, but independent tests keep bearing out vendor assertions. In 2013, US Dept. of Energy’s Advanced Rooftop Control (ARC) Retrofit: Field-Test Results (PDF) verified savings and demonstrated that these products- especially Transformative Wave’s Catalyst – are ready for prime time. Read Article Here

Editor’s Note:  Cooper Oates Air Conditioning is a certified Transformative Wave Affiliate, offering the Catalyst solution to building owners, property managers and facility engineers throughout the Sacramento Region. For information on how this RTU energy saving solution can work for you, contact info@coacair.com or download the Catalyst Brochure here.
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