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Standards Development Committee 300

The RESNET Standards Development Committee 300 is responsible to oversee RESNET’s technical standards related to the inspections, testing, and calculations that impact an energy rating and amending those standards.

SDC 300 Members

Chair: Gayathri Vijayakumar, Steven Winter Associates, Inc

Thiel Butner, Pando Alliance

Terry Clausing, Drysdale & Associates

Charles Cottrell, NAIMA

Philip Fairey, Florida Solar Energy Center

Dean Gamble, U.S. Environmental Protection Agency

C. R. Herro, Meritage Homes

Kelly Parker, Guaranteed Watt Savers

Jerry Phelan, Covestro

Dave Roberts, National Renewable Energy Laboratory

Amy Schmidt, DOW

Brian Shanks, Beazer Homes

Jason Toves, ICC

Previous Meetings

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SDC 300 Calculations SC


  • CHAIR: Dave Roberts, National Renewable Energy Laboratory
  • Brian Christensen, NORESCO
  • Charlie Haack, North American Insulation Manufacturers Association
  • Gayathri Vijayakumar, Steven Winter Associates
  • Neil Leslie, Gas Technology Institute
  • Philip Fairey, Florida Solar Energy Center
  • Robert Salcido, Salcido Solutions
  • William Ranson, DuPont


The Calculations Subcommittee provides technical support to SDC 300 on topics related to ANSI/RESNET/ICC 301 and portions of the Mortgage Industry National HERS Standards related to calculations and HERS software accreditation.  The SC reviews Interpretation Requests (IRs), Continuous Maintenance Proposals (CMPs), and Innovative Design Requests (IDRs) assigned to it by the SDC 300 Chair, and develops CMPs in response to New Work Initiatives (NWIs) assigned by SDC 300 Chair.


Completed Amendments to ANSI/RESNET/ICC 301-2019:

Addendum A, Dishwashers, Clothes Washers and Dryers

Amendments under development to ANSI/RESNET/ICC 301-2019:

Addendum B, Additions and Clarifications

  • Add definition for Thermally Isolated Sunrooms
  • Clarified definition for Dwelling Unit Mechanical Ventilation
  • Clarified the specific exterior surfaces that are used in calculating Aext
  • Explicitly stated that Total Duct Leakage results may be used as Duct Leakage to Outside
  • Clarified the DSE for the Reference Home where no system is installed
  • Clarified the duct leakage test alternatives for units in 2-family buildings
  • Clarified the COP to be used when modeling equipment that has more than one rated COP, under certain conditions
  • Modeling to account for dehumidification
  • Add definitions essential to aligning Standard 301-2019 with proposed Standard 310 and capitalize the terms when used throughout the Standard
  • Add references to Standard 310
  • Add  Minimum Rated Feature criteria to be collected by raters essential for grading the installation of HVAC systems pursuant to Standard 310

Projects under development/consideration for the 2022 edition of 301:

  • Allowing guarded test results
  • Credit for “smart” thermostats and “smart” recirculation system sensors
  • Recirculation losses for central DHW systems
  • Infiltration calculations for units above 3 stories in elevation
  • Working with Software Consistency Committee to identify other changes needed to 301 to improve consistency across tools, and as all approved tools move to hourly calculations in 2020

SDC 300 Enclosures SC Members

  • CHAIR: Thiel Butner, Pando Alliance
  • Brian Lieburn, Dupont
  • Brian Stanfill, McGrann Associates
  • Dan Wildenhaus, TRC Companies
  • Kelly Parker, Guaranteed Watt Savers
  • Paul Gay, US-EcoLogic
  • Mikael Salonvaara, Oak Ridge National Laboratory
  • Terry Clausing, Drysdale & Associates
  • Brett Welch, Knauf Insulation


The RESNET SDC 300 Enclosures Sub-Committee is tasked with maintaining and improving RESNET’s visual inspection requirements.  These requirements are primarily described in Appendix A and Appendix B of ANSI/RESNET/ICC 301-2014 and 2019.


Projects working on for the 2022 edition of 301:

  • Inspection requirements related to framing factors
  • How to properly evaluate the presence of ‘advanced’ framing
  • Better guidance regarding duct insulation
  • Partnering with ASTM to develop an infrared (IR) insulation inspection standard
  • Adding inspection protocols and definitions that will be needed for use with the HVAC Grading Standard (under development now, BSR/RESNET/ACCA 310-20xx)

SDC 300 Equipment SC Members

  • Leo Jansen, Chair
  • Bruce Harley, Bruce Harley Energy
  • Dennis Stroer
  • Dean Gamble, US EPA
  • Gary Nelson, Energy Conservetory
  • Iain Walker
  • Warren Lupson,
  • Bill Spohn, TruTech Tools