What you’ll find on this page: Here are links to presentations that were given in 2011, some at the Affordable Comfort Summit in San Francisco, some at the ACEEE Hot Water Forum in Berkeley. Often, you’ll see a slide show that covers the bare bones of the more elaborate talk given by the speaker.
The Future of Water-Heating: What’s Possible? by Larry Weingarten — A look at where we came from and which ideas from the past have merit here and now, as well as where we might be going. (Affordable Comfort Summit)
The Most Ignored Residential Appliance, by William Hoover — High-efficienty water heaters may have a tough road to widespread acceptance simply because most people are living paycheck to paycheck and can’t afford them. (ACEEE Hot Water Forum)
Where Is Hot Water in High-Performance Buildings? by Gary Klein, Affiliated International Management, LLC — A key point he makes with this topic is that hot water uses a LOT of energy, so paying attention to how it is generated and delivered, and where waste is created, has giant implications for any effort to cut energy use. (ACEEE Hot Water Forum)
Three Elements Electric Water Heaters by Andre Laperriere, Hydro Quebec — Often, a big concern for utilities is trying to influence peak demand. If they can level that out, they can serve their customers without having to build more dams, more power plants, more everything. Heat-pump water heaters have limitations. If it’s too hot, they shut down. If it’s too cold, there isn’t any heat to pump into the water and they revert to their backup resistance elements. Then they are no longer twice as efficient. But Hydro Quebec got the idea of trying something different, a three-element electric heater (most have just two elements). (ACEEE Hot Water Forum)
Evaluating a Hot-Water Distribution System, By Gary Klein, Affiliated International Management, LLC — Gary Klein helped develop the concept of structured plumbing. Here he talks about how to evaluate a plumbing system to determine what the optimal placement of demand pumps should be. Demand pumps provide an energy-efficient way of quickly getting hot water to faucets without wasting cold water, especially in ranch-style houses, that often have the water heater at one end of the house and the bathrooms at the other.
Domestic Hot-Water Assessments in Multifamily Buildings, by Andrew Brooks, Association for Energy Affordability, Inc. — Apartment owners and managers: this presentation is for you. It includes strategies for using water heaters, boilers, tankless heaters and indirect heaters, piping strategies, the right way and the wrong way and what happens when it’s done the wrong way.
Field Experiences With Heat-Pump Water Heaters, by Chris Gray of Southern Company — A utility installed about 50 heat-pump water heaters in homes to see what reactions and comments they got from those using them.
Forget That Hover Car — Finding a Sustainable Future Through Water and Energy Codes, by Alice La Pierre of the city of Berkeley. Ms. La Pierre explains what Berkeley’s ordinances are and why they are in place, while giving us a journey into the past.
What Could Possibly Go Wrong? by Larry Weingarten, presented in July 2011 at the Building Science Water Heater Expert Session, in Boston, MA. It describes the concept of “elegant simplicity” and warns of likely problems that will result as systems become more and more complex.