Meeting the Challenge of Persistent Energy Efficiency
in Roof Top Units

Karen des, PECI
Reid Hart, PE, PECI
Mark Cherniack, NBI

Thousands of existing rooftop HVAC units operate inefficiently and require tune-ups to enhance unit performance until they are replaced by the next generation of roof top units (RTUs). Karen des and Reid Hart cover the topic of energy efficiency, adjustments and repairs in those existing units. They will also review the impact of the AirCare Plus program, in operation since 2002. This enhanced HVAC tune-up program is designed to optimize the performance of all major energy-using components of unitary HVAC systems. Hart and des explain how state-of-the art diagnostic tools and a comprehensive protocol are used by service contractors in this HVAC tune-up effort. Key areas of focus for commissioning providers who encounter unitary HVAC systems will be covered.

A new generation of roof top units is now available. Mark Cherniack will look at the new units and what will be available in the future of RTUs. The advanced rooftop unit project will be covered along with requirements to meet the need for energy efficiency and operation of this equipment. The current RTU service paradigm in utility HVAC programs will be reviewed in the context of a critically needed shift from service only to service plus retrofit. The business case for this transition will be presented along with an overview of utility HVAC programs in the West addressing present and future commercial RTU HVAC needs.