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Webinar – Optimizing Residential Forced-Air HVAC Systems: Efficiency, Comfort and Low Loss Duct Systems

April 2 @ 9:00 am - 12:00 pm


Improved design, installation and commissioning practices lead to a dramatic improvement in building energy consumption, indoor air quality, and comfort. There are six performance factors that can be applied to HVAC design, installation and/or commissioning. In the Optimizing Residential Forced-Air series, we will review how each factor can be specified at design, implemented during installation, and tested/adjusted during commissioning. We will also look at how we can redesign our approach to high performance HVAC systems to support CA climate goals, help manage the peak electrical load on the grid as well as the owners operating cost under the time-of-use billing structure.

The Optimizing Residential Forced-Air series is informed through commissioned systems, where real examples from completed projects are used to support class content. We have designed, built, and commissioned both retrofit and new construction projects that exemplify the concepts covered in class. Course content will include design examples, photos installations, and test results from commissioning.

The HVAC equipment, materials and knowledge required to dramatically improve the performance of HVAC systems is readily available. This class will assist the designer, installer, and rater in their efforts to improve the HVAC systems we build.


Instructor Bio

Dan Perunko

Dan Perunko is cofounder of Balance Point Home Performance Company. In 2006, along with Gavin Healy, Dan started a successful company providing full service home performance analysis, retrofits, consultations, and trainings. Dan works on new and existing construction designs and hands on installations of enclosures, mechanical, plumbing, and indoor air quality components based on tested performance outcomes. Dan especially enjoys improving existing homes to provide homeowners with levels of comfort and energy consumption that they have not believed possible. Dan is a professional trainer who designs and delivers full and multi day courses for California’s utility companies (energy training centers) and ACI national and regional conferences. Dan brings his experience from construction, design and building analysis, to make his class materials relevant, useful and understandable regardless of the attendees’ level of experience.



  • Introduction and safety message

Duct Leakage

  • How much leakage is the right amount
  • Air quality consequence
  • Energy usage consequence
  • How tight can a duct system be
  • Industry performance, your chance to shine
  • How to seal effectively
  • How to motivate the crew

Duct Conduction

  • How much energy do ducts lose through conduction?
  • Duct location and insulation strategies
  • Simulating ducts in conditioned space
  • Using multiple small footprint duct systems to reduce conduction losses

System Airflow

  • Low air flow volume effects duct conduction losses

System Capacity

  • System Capacity targets for CA systems
  • Typical System Capacities CA systems
  • System Capacity and duct leakage
  • System Capacity and duct conduction
  • System Capacity drivers that impact poor system airflow

The objective of this course is that at the conclusion, participants will be able to:

  • Describe typical duct leakage in CA systems
  • Recognize the importance of performance targets for low leakage duct systems
  • Summarize the typical system capacity losses resulting from duct conduction
  • Outline four key strategies for reducing duct conduction losses
  • Detail the mechanism that cause energy loss in low airflow systems
  • Compare typical equipment sizing versus performance equipment sizing
  • Review the energy losses resulting from typical oversized system capacities