The February 9 webinar will cover the water heating provisions of the Seattle and Washington state energy codes for “commercial buildings,” highlighting requirements that are new to this year’s code and the differences between the Seattle and state codes. (“Commercial buildings” also include multifamily buildings taller than 3 stories.) Discussion topics will include circulation controls, additional pipe and tank insulation, and new state fixture flow rates, but will focus primarily on new Seattle requirements for heap pump water heating. Duane Jonlin, FAIA, will explain the code requirements, while special guests Jonathan Heller and Colin Grist of Ecotope will discuss high-performance water heating technology options, based on a number of successful installations. Q&A time to follow.

Learning Objectives

Attendees will learn to:

  • Reduce energy use and carbon emissions by optimizing water heating systems
  • Design code-compliant water heating systems
  • Select technology appropriate for the size and type of building
  • Reduce hot water circulation losses and pumping energy
  • Plan for heat pump water heating space requirements 


Brought to you in collaboration with the Lab at Seattle City Light and Seattle Department of Construction & Inspections

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DJ smile.pngDuane Jonlin, FAIA | Energy Code and Energy Conservation Advisor, Seattle Department of Construction and Inspections

Duane Jonlin is the “Energy Code and Energy Conservation Advisor” for Seattle’s Department of Construction and Inspections, and for eight years chaired the Energy Code Technical Advisory Group for the Washington State Building Code Council.  At the national level, he is a voting member of both the ASHRAE 90.1 Committee and the ICC Commercial Energy Code Committee, and serves on several national advisory committees. Prior to taking his position at the City of Seattle, Duane was a principal at NBBJ, with 30 years’ experience designing complex projects as a technical architect. He is a featured speaker nationally on issues of energy efficiency and energy regulations, and in 2016 was elected to the American Institute of Architects College of Fellows.

colin-grist-2020.jpgColin Grist, P.E., CPHC® | Mechanical Engineer, Ecotope

Colin has designed more than 20 heat pump water heating systems from multiple vendors for both high- and mid-rise multifamily buildings. He is a Certified Passive House Consultant and a licensed Professional Mechanical Engineer. Colin performs building analysis, load calculations, energy modeling, and HVAC engineering design using tools such as Revit, AutoCAD, eQUEST, Excel, Stata, Trane Trace and other computational programs. On site, Colin works closely with clients on commissioning, construction administration, and energy audits of new and existing buildings. Colin has a diverse work background in the HVAC, refrigeration, and plumbing disciplines with experience in multifamily developments, libraries, and community centers.


Water Heating


The link above takes you away from the Lighting Design Lab site to a registration page through GoToWebinar. Please email with questions or concerns.