About | Sierra Building Science Inc.

Incorporated in 2007, Sierra Building Science, Inc. (SBSI) is a training and consulting firm based in the Sacramento area.  We specialize in residential energy and HVAC topics, including:

  • Energy codes
  • Home energy rating systems (HERS)
  • Energy auditing
  • Diagnosing home comfort and energy bill issues
  • HVAC design
  • Duct leakage testing
  • Refrigerant charge verification
  • Blower door testing
  • Residential air balancing

In the process of performing hundreds of duct leakage tests and teaching hundreds of others how to perform them, Russell King, M.E. invented a register sealing system that once you try it, you’ll never go back to the old way of sealing registers for a duct leakage test.  Duc-Bloc™ pans utilize top-quality Zip-Wall™ spring loaded poles to create an air tight seal without ladders or tape.  Duc-Blocs are handmade in our shop right in Elk Grove, CA from renewable, engineered wood products.  We seek provide work experience for local high school students whenever possible.

Consistent with our goal of improving the energy efficiency and comfort of homes by helping raters and technicians do their jobs as efficiently as possible, we are proud to introduce Flow-Box™.  This unique device turns your blower door fan into an HVAC system fan flow measurement tool for a fraction of the price of a passive flow hood. It allows you to perform either a passive flow hood test or a plenum pressure matching test at the return grille.  It has many advantages over tools costing much more.  Custom built in the same shop as Duc-Blocs™,