Library

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

Factsheet describing mini split heat pumps and their benefits for consumers.

This report evaluates the performance of variable-capacity comfort systems, with a focus on inverter-driven, variable-capacity systems, as well as proposed system enhancements.

Report exploring feasibility of designing prescriptive retrofit measure packages for typical Chicago region multifamily buildings in order to achieve 25% source energy savings.

Report summarizing post-retrofit results for 13 existing homes in a deep energy retrofit pilot program.

Technical report presenting the results of an evaluation of homes using high-efficiency mini-split heat pumps to supplement the primary heating and cooling systems.

Report evaluating opportunities to improve and streamline delivery of residential retrofit measures.

Report examining implementation of an exterior insulation and over-clad strategy for brick masonry buildings in Chicago.

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...

Article describing a study of the potential to use heat pumps to heat and cool homes across the United States, including cold climate locations like Alaska.

Report about an expert meeting focused on issues surrounding cladding attachment and performance of walls with exterior insulating sheathing.

Study characterizing how foundation heat exchangers (FHXs) used in residential ground source heat pump systems represent a potential cost savings due to their lesser first cost over other types of heat exchangers.

Report comparing a high-performance house with a code-built control home.

Information sheet with an analysis of mini split heat pump systems.

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...

Report on field monitoring of inverter-driven ASHPs in cold-climate homes.

Report presenting the results from several demonstrations of a new method for sealing building envelop air leaks.

Article describing five fundamental changes to building construction from the last 50 years and their modern construction consequences.

Journal article describing energy and cost savings potential from air sealing multifamily town homes.

Journal article describing lessons learned from updating a 16-year-old deep-energy retrofit.

Report about development of effective strategies to reduce the overall building energy use in line with Building America goals in this modestly priced market rate project.

Website providing resources for roofers to construct high-wind, hurricane, and hail-resistant roofs from IBHS Fortified program.

Report describing a project aimed at developing validated models and design tools for foundation heat exchangers.

Article describing a numerical model that can be used to size foundation heat exchanger (FHX) systems.

A guideline containing fire sprinkler insulation requirements from the Prescott, Arizona Fire Department.

Report investigating the status of the geothermal heat pump (GHP) industry and technology in the United States, assembling GHP energy savings potential, identifying key barriers to application of GHPs, and identifying actions that could accelerate adoption of GHPs.

Website with information about ENERGY STAR criteria for geothermal heat pumps.

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.

Article describing techniques to air-seal townhouses and row houses.

Website article discussing the economics of ground source heat pumps.

Report presenting a cold climate project examining and alternative approach to ground source heat pump ground loop design.

Report describing the ground-source IHP (GS-IHP) design and includes the lessons learned and best practices revealed by the research and development (R&D) effort throughout.

Factsheet describing the uses and benefits of ground-source heat pumps for affordable housing, assisted living, dorms and hotels.

Factsheet describing how to install air source heat pumps for residential heating and cooling in cold climates.

Factsheet describing how to install air source heat pumps for residential heating and cooling in cold climates.

Guide by the Northeast Energy Efficiency Partnerships on how to size heat pumps in a cold climate.

A ENERGY STAR guide on efficient heating, ventilation and cooling systems in residential homes.

Report describing the various heat pump retrofit options for multifamily buildings in the U.S., segmented by building typology and heating system, to support better environmental, economic, and health outcomes.

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...

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.

Presentation about heat pump water heater modeling using EnergyPlus.

Article discussing the advantages of using heat pumps and/or hydronic forced air heat instead of furnaces in high-performance homes.

Webpage providing basic information on various types of heat pumps and their applications in Massachusetts.

Blog post about heat pump clothes dryers.

Report providing information for HVAC designers, installers, and consumers about air source heat pumps.