Library

Report documenting the results of an in-depth evaluation of thermal comfort for two potential net zero-energy homes (NZEHs) in Massachusetts.

List of commercial heat pump water heater systems that comply with NEEA's Advanced Water Heating Specification.

List of multifamily commercial heat pump water heater products that meet the NEEA Advanced Water Heating Specification Requirements.

Webpage with instructions for heat pump installers to choose the most suitable type of heat pump system, according to a project’s specific requirements.

Document for contractors detailing how to prioritize, control, and configure heat pumps in a residence that uses two heating systems.

Document for customers describing the benefits of two-system controls for homes, including information answering how, when, why, and how two-system controls with multiple heating sources are employed.

Report telling consumers how radon gets into a home and how to reduce radon entry into a home.

Report on experiments comparing the cooling and heating seasonal and peak demand performance of different variable-capacity air conditioning and heat pump units.

Technical bulletin addressing surfacing options in regards to composite wood panels and their emission barrier capabilities.

Article describing the causes of wood decay and moisture issues.

Research report describing the development of standardized test methods for PM2.5 and CO2 sensors enabling reliable, low-cost indoor air quality monitoring and improvement.

Online database with efficiency information about residential HVAC systems and commercial refrigeration equipment.

Webpage describing the successes and ongoing efforts of the Northwest Energy Efficiency Alliance's Go Ductless ductless heat pump program which successfully encouraged the installation of more than 150,000 minisplit heat pumps in the Northwest between 2010 and 2021.

Research report with results from field tests in two homes in Austin, Texas, from October 2011 to June 2012 to evaluate the comfort performance of ductless mini-split heat pumps

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.

A report describing six mechanical ventilation strategies that were evaluated for their ability to control indoor humidity levels over 14-day periods with simulated occupancy.

Report describing an investigation into multiple occupancy-based ventilation control strategies and the associated energy savings.

Webpage from U.S. Department of Energy describing using Earth-Sheltered home building techniques in hot climate zones.

Report demonstrating how the initiative achieves Building America (BA) goals of 30%-50% energy savings in multifamily dwellings in the hot-humid climate zone.

This study evaluates the energy, humidity and indoor air quality implications of residential ventilation cooling in all US IECC climate zones.

Website with consumer information about residential heat pump systems.

Online reference containing general information about geothermal heat pumps.

Report investigating performance and energy savings potential of heat pump water heaters.

Research study describing experiments run in an unoccupied 1600 square foot house to evaluate the delivered performance as well as the relative performance of a SEER 21 variable capacity heat pump versus a SEER 13 heat pump.

This publication provides a set of best practices for improving indoor air quality in conjunction with energy upgrade work in homes.

Technical report describing the enhancement of energy efficiency in existing buildings through a systems approach, assessing airflow-focused retrofits for improved energy savings and indoor air quality, considering factors like air leakage, distribution system dynamics, duct leakage, and ventilation...

Searchable list of heat pumps that meet ENERGY STAR criteria.

Webpage recognizing the most efficient products among those that are ENERGY STAR certified.

Program criteria for central air conditioner and heat pump equipment.

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.

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 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 on the performance of range hood exhaust fans.

Fact sheet describing indoor air quality (IAQ), including information on common sources of indoor air pollutants and best practices for improving IAQ.

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 outlining how Smart ventilation controls (SVC) balance energy consumption, comfort, and IAQ by optimizing mechanical ventilation operation to reduce the heating and/or cooling loads, improve management of indoor moisture, and maintain IAQ equivalence according to ASHRAE 62.2.

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.

Technical report on a field validation study that utilizes low-cost indoor air quality sensors to assess a smart ventilation system's effectiveness in maintaining acceptable indoor humidity in low-load homes in humid environments, revealing that while the smart ventilation algorithm demonstrated...

ASHRAE Q&A addressing HVAC filtration and disinfection for reducing the spread of COVID-19.

Page describing in detail four important actions you should consider to protect your health and indoor air quality (IAQ) when cleaning up after a flood.

Detailed information about Formaldehyde including health effects and strategies to reduce exposure.

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.