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HVAC logic improvements

APS has developed many unique HVAC logic circuits: improving comfort and reducing energy consumption. The reductions caused the avoidance of over 60,000 person-years of GHG emissions with a three-person crew.

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A great asset to DDSB

David has been our primary Controls Contractor for last 25 years. We are always surprised that even today he comes up with new and innovative designs.

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Mr. Strain’s work leverages modern technology to achieve superior results. With further development, this invention could contribute to reducing energy consumption and reliance on fossil fuels, aligning with global efforts
David has been our primary Controls Contractor for last 25 years. We are always surprised that even today he comes up with new and innovative designs.
David Strain's invention demonstrated an efficiency advantage greater than 15°/o favoring the diamondshaped actuator over a conventional actuator.