Reference
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Fact sheet describing principles of insulating steam distribution and condensate return lines as an effective way to prevent energy loss.
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Website with consumer and contractor information about building codes and regulations for solar water heating systems.
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Guide describing how to choose energy-efficient water heaters, including heat pump models, with tips on installation, rebates, and incentives for maximizing energy savings.
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Case study of new home construction in the hot-dry and mixed-dry climate zones.
Presentation
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Video that discusses the most common technologies for heating water, including storage, tankless, heat pump, and solar water heaters. It also goes over practices for saving energy with water heating systems.
Reference
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2009 edition of code establishing a baseline for the design and installation of fuel gas systems and gas fired appliances through performance requirements.
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Description
2009 edition of code establishing minimum regulations for plumbing facilities, including fixtures, water heaters, water supply and distribution, sanitary drainage, storm drainage, etc.
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Description
2012 edition of code establishing minimum regulations for plumbing facilities, including fixtures, water heaters, water supply and distribution, sanitary drainage, storm drainage, etc.
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2015 edition of code establishing minimum regulations for plumbing facilities, including fixtures, water heaters, water supply and distribution, sanitary drainage, storm drainage, etc.
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Description
2018 edition of code establishing minimum regulations for plumbing facilities, including fixtures, water heaters, water supply and distribution, sanitary drainage, storm drainage, etc.
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A info sheet providing information on ENERGY STAR certified water heaters and the various criteria water heaters must undergo to become ENERGY STAR certified, including metrics on efficiency and performance.
Case Study
Description
Case study describing a building project in the marine climate.
Video
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Video describing a combination heat and hot water system that pumps hot water through a coil in the air handler to distribute through the house.
Video
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Video describing the air-to-water heat pump and radiant floor system in a passive house.
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Case study describing solar thermal and photovoltaic systems in new construction.
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Guide designed to help builders better understand and meet the hot water delivery system criteria as specified in EPA's WaterSense New Home Specification.
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List of commercial heat pump water heater systems that comply with NEEA's Advanced Water Heating Specification.
Case Study
Description
Case study describing a building project in the mixed-humid climate zone.
Case Study
Description
Case study describing a retrofit project in the mixed-humid climate zone.
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Description
Information sheet describing how to select a properly sized water heater based on household usage patterns, peak demand, and heater type—whether tankless, solar, or storage-based—to ensure efficiency and adequate hot water supply.
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The Heat Pump Water Heater Installation Tool helps contractors, installers, and homeowners through the decision-making process for heat pump water heater (HPWH) product selection and installation, with a focus on overcoming installation barriers.
Case Study
Description
Case study describing a new home construction project in Florida.
Reference
Description
Outlines the minimum criteria for a solar water heating system installed by a Solar Water Heating Program trade ally under Energy Trust of Oregon’s Solar Water Heating Program.
Reference
Description
Article describing how demand plumbing systems send cold water back to the water heater until hot water arrives at the sink, shower or other fixture where it is needed.
Case Study
Description
Case study describing a building project in the mixed-humid climate zone.
Case Study
Description
Case study describing a building project in the mixed-humid climate zone.
Reference
Description
Report describing the identification of barriers and proposed practical solutions for the design, installation, and market adoption of heat pump water heaters in new low-rise multifamily housing, focusing on studio and one-bedroom units.
Presentation
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Webinar from GTI Energy on thermally-driven heat pumps (THPs) for the uses of space heating and domestic hot water. The webinar serves as an overview of the new technology, energy usage, operating costs, environmental impacts, and home comfort results.
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Description
Article investigating how a linear input/output relationship can be used as a simple model of the performance of a combination hydronic heating system over heating only, DHW only, and combined loads.
Reference
Description
Checklist describing solar water heating recommendations per the DOE Zero Energy Ready Home program.