Library

Report describing an air distribution system composed of a series of uniformly-sized ducts that terminate in rooms throughout the home and return to a central manifold, similar in fashion to a “home-run” cross-linked polyethylene plumbing system.

Document outlining the current and the proposed draws and estimates typical ratings changes from draw specification changes for typical systems in four cities.

Specifications for water heating systems designed to advance higher performing electric and gas heat pump water heaters.

Report describing two retrofit duct sealing techniques - manually-applied sealants and injecting a spray sealant, that were implemented in several low-rise multi-unit buildings in North Carolina.

Report describing methodology, analysis, and findings from a case study of a 110-unit retrofit of gas tankless water heaters in a hot/humid climate in Alachua County, Florida.

Report summarizing commissioning, short-term testing, utility bill data analysis, and results of on-site monitoring of a deep energy retrofit.

Case study describing solar thermal and photovoltaic systems in new construction.

Case study describing solar thermal and photovoltaic systems in new construction.

Document providing guidance to U.S. home builders who want to accept the challenge.

Case study describing solar thermal and photovoltaic systems in new construction.

Document about testing software predictions of retrofit energy savings in existing homes.

Document providing an example procedure for establishing acceptance-range criteria to assess results from software undergoing BESTEST-EX.

Training module describing the operation, efficiency, consumer and seller benefits, and cost comparison of Heat Pump Water Heaters (HPWH) against conventional gas, oil, or electric water heaters.

Design guide providing solutions and tools for designing central heat pump water heater systems in multifamily and other commercial buildings.

Report summarizing the key opportunities, gaps, and barriers identified by the national laboratory white papers discussing long-term 50% energy reduction goals.

Report describing combined space- and water-heating (combi) systems using a high-efficiency direct-vent burner.

Report about instrumentation and limited short-term testing completed on a retrofit unoccupied test house in Fresno, California.

Research report providing a comparison of the most common residential water heating technologies to determine energy-efficient and cost-effective water heating technologies are when subjected to a variety of typical operating conditions.

Research study comparing various retrofit models in Wisconsin to evaluate performance in terms of savings per home and program cost per home to assess the relative cost effectiveness of each program design.

Report about a hybrid condensing water heater (thermal efficiency = 0.973, energy factor = 0.95) installed in an occupied home in Sacramento, California, and monitored for one year to determine the actual in situ efficiency.

Report exploring alternative methods to find long-term solutions to energy loss in 1 ½-story homes to save energy, improve comfort, prevent frost buildup on the underside of the roof deck, and reduce the risk of ice dam formation/reformation.

Report describing the monitored long-term performance of two solar domestic water heating systems in northern climates.

Research study evaluating energy savings and cost effectiveness of installing low-emissivity (low-e) storm windows over existing windows in residential homes in all climate zones.

Part of a larger LBNL report (Deep Energy Retrofit Guidance for the Building America Solutions Center), the Occupant Behavior chapter discusses how to assess homeowner behavior patterns and use these patterns to enhance overall energy savings.

Part of a larger LBNL report (Deep Energy Retrofit Guidance for the Building America Solutions Center), the Over Time, Phased Guidance chapter presents a phased approach to deep energy retrofits.

Report describing the progress toward and issues related to developing a usable, standardized, empirical data-based software accuracy test suite.

Report identifying business models for the remodeling industry that foster remodelers adoption of energy efficiency services.

Journal article presenting a discussion of the state-of-the- art in electricity management in smart homes, the various enabling technologies that will accelerate this concept, and topics around consumer behavior with respect to energy usage.

Research study examining efficiency retrofit opportunities, typical renovation practices, and pathways for achieving U.S. Department of Energy (DOE) goals for existing homes in Florida.

Study investigating homeowner measure package choices in the Illinois Home Performance with ENERGY STAR program compared to cost-optimal choices determined through Building Energy Optimization (BEopt) modeling software.

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.

Technical report describing the evaluation of four different ventilation strategies for providing make-up air in high-performance, new construction multifamily buildings in the Northeast, emphasizing the challenges posed by increasing airtightness standards and the variability of system performance...

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.

Report describing a project focused on the use of home energy ratings as a tool to promote energy retrofits in existing homes.

Report describing a simple and general way to generate House Simulation Protocol (HSP)-consistent internal sensible and latent loads in unoccupied homes.

Brochure on specifications for solar thermal systems.

Report detailing field walk-through evaluations, energy simulations for projected savings with exterior insulation upgrades, building envelope energy improvement cost estimates, and installation and maintenance of monitoring equipment and data.

Research report presenting results of short term tests on measures used in an energy efficiency retrofit project in California.

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 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.

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

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

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

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.

Report describing the objective evaluation of space conditioning interactions between heat pump water heaters and home heating systems during winter 2016-2017, revealing a smaller than anticipated impact on space conditioning loads.

Report summarizing results of testing emerging combo water heating technologies under controlled laboratory operations, that differentiate the performance of the various packaged equipment configurations being offered.

Report using a field test plan to evaluate the success of implementing energy efficiency upgrades at the community scale incorporating whole-house systems integrated measures package (SIMP).

Report identifying the target market for solar water heaters and potential pathways and cost/performance targets that must be met for these systems to realize large energy savings.

Document pertaining to design and application guidance for combination space and tankless domestic hot water heating systems used in residential buildings, based on field evaluation, testing, and industry meetings.