Library

Free online tool for sizing central heat pump water heater systems.

Technical report evaluating the effects of heat pump water heaters on heating and cooling energy usage in laboratory homes.

Study presenting generalized results regarding the effect of surface orientation on annual incident solar radiation for locations in the United States.

Article describing a case study in which a whole-house battery and PV system was tested in a home with cooling and refrigeration during a hurricane in Florida.

Informational guide describing the benefits, functionality, and cost savings of ENERGY STAR® certified heat pump water heaters, addressing common misconceptions and highlighting incentives.

Document talking about the topic Energy-Efficient Florida Home Building.

DOE-sponsored report describing the experimental setup and results of field studies on using interior cellular shading attachments to reduce solar heat gain in summer and reduce heat loss in winter.

Report describing the methods and results of a field evaluation of the energy performance of cellular shade window coverings.

DOE-sponsored report describing the experimental setup and results of field studies on using exterior fabric shading attachments to reduce solar heat gain, reduce glare, and improve comfort.

DOE-sponsored report describing a study investigating the energy savings potential of cellular shades in homes.

DOE-sponsored report describing a study investigating condensation buildup on windows when using insulating shades.

Report describing the performance, cost, and carbon impacts of unitary heat pump water heaters with load-shifting controls in a shared configuration for a multi-family project, highlighting significant savings in energy usage, CO2 emissions, and utility costs.

The main objective of this expert meeting was to bring together a group of experts intimately involved with issues related to assessing the performance of residential high efficiency water heating systems.

Expert meeting describing meeting details for recommendations for applying water heaters in combination space and domestic water heating systems.

An engineering design guide for hydronic heat loops, discussing the features and advantages of condensing boilers.

Report describing the in situ performance evaluation of newly released heat pump water heaters (HPWHs), highlighting their energy and cost savings potential compared to conventional electric resistance water heaters and other alternatives, based on data collected from installations in Massachusetts...

A webpage discussing how water heater expansion tanks operate and how to repair them.

Study reporting the results of comparative testing of the effect of various roof types on cooling energy performance in a test facility.

Website with information for consumers about solar thermal systems for homes.

Standard that applies to storage water heaters, instantaneous water heaters, and circulating water heaters including booster water heaters; the current version of this standard was published in the year 2019 and it is available for purchase along with a digital preview on the ANSI webstore page.

Brochure on specifications for PV systems.

Brochure on specifications for solar thermal systems.

A website providing geospatial data , tools, and maps including data on the U.S. solar resources for solar power.

Report describing the cost-effectiveness and performance of all-electric, zero net energy multifamily buildings in California, detailing technical challenges and providing recommendations for design, construction, codes, standards, and operations to support future projects.

Fact sheet defining a grid-interactive efficient building and its benefits.

Website highlighting the DOE Building Technologies Office Grid-interactive Efficient Buildings Initiative, including technical reports, other publications, resources, and presentations.

Report evaluating lighting and electronic building technologies based on their ability to provide grid services and the type of value provided, including efficiency, load shed, load shift, and modulation.

LBNL webpage introducing heat island effect and cool materials concepts, and providing links to LBNL pages explaining cool pavements, cool roofs, and cool walls.

LBNL webpage providing resources and tools related to cool technologies, including the SRI calculator and the DOE Cool Roof Calculator.

Informational guide describing the design, installation, and maintenance best practices and technical considerations for integrated Heat Pump Water Heaters in single-family and multifamily new construction.

Report describing the advantages and best practices for installing heat pump water heaters (HPWH), highlighting their improved energy efficiency, reliability, and critical considerations such as condensate management, proper sizing, and optimal installation location to enhance performance and...

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.

Report describing the significant potential for energy use reductions through heat pump water heaters, which have been a crucial part of Northwest power plans for decades and have recently achieved substantial savings with new integrated models and climate specifications.

Report describing the features, benefits, and best practices for the design and installation of heat pump water heaters in new low-rise multifamily buildings, highlighting their efficiency, reliability, and contribution to decarbonization goals.

Report describing a laboratory assessment that provides insights into space requirements and venting strategies for heat pump water heaters (HPWH) to enhance retrofit installations and provide actionable guidance for manufacturers, designers, engineers, installers, and owners.

Guide providing detailed selection and installation instructions for heat pump water heaters.

Provides consumers with general information on solar water heating systems and how to select a contractor.

Case study of new home construction in the hot-dry and mixed-dry climate zones.

Report providing an introduction to current photovoltaic and solar thermal building practices.

Best Practices document providing an introduction to current photovoltaic and solar thermal building practices.

Web article about solar site assessment.

Report on a project that enhanced the HWSIM distribution system model to more accurately model pipe heat transfer.

Article describing the factors that can lead to inefficient hot water distribution systems in homes.

Guide describing how to choose energy-efficient water heaters, including heat pump models, with tips on installation, rebates, and incentives for maximizing energy savings.

ENERGY STAR webpage describing how a heat pump water heater works.

Report presenting construction methods, building products, appliances and equipment of four single-family houses that achieve dramatic energy reductions and approach “net zero energy” use.

A structural insulated panel (SIP) roof has no embedded lumber in the structure, and therefore nothing substantial for attaching PV array and solar hot water mounts. Single or double lumber splines could be put into the panels, or I-joists at 4-foot intervals could be added.

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.

Website providing comparison charts and reviews of hybrid inverters for solar power systems.

Journal article presenting modeling of residential gas water heaters via dynamic simulation models to determine the effect of the pilot light on their annual energy consumption.