Library

ENRGY STAR webpage discussing the basics of certified ceiling fans.

Information sheet with information about insulating and ventilating attics.

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

Specification defining performance and reporting requirements to meet the voluntary “Cold Climate Air Source Heat Pump Specification” (ccASHP Specification) for air source heat pumps suited to heat efficiently in cold climates (IECC cz 4 and higher).

Webpage outlining how to optimize the installations and performance of mini-split heat pump systems. As well, it discusses a set of design considerations for multi-level homes, low load homes, and heat distribution to rooms without a heat source.

The Cold Climate Heat Pump Decision Tool guides contractors and installers through the decision-making process for heat pump (HP) sizing, identifying personalized CCHP recommendations, and applicable tax credits, with a focus on retrofits in cold climates.

Report on a simplified test procedure for combustion safety that is easier to implement and should produce fewer false positives than the previous procedure.

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.

Research report anayzing the results of a large retrofit project, turining an old school into near zero energy consumption apartments in Greenfield MA.

Article describing the use of whole-house fans to provide cooling in the region surrounding Sacramento, CA.

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

Report providing recommendations to builders regarding how to reduce cooling loads, use air-circulation fans, natural ventilation, window and building design for natural ventilation, and whole-house fans.

Short report providing tips on how to reduce heat gain and passively cool a home.

Standard describing prediction, mitigation, and reduction of moisture damage to the building envelope, materials, components, systems, and furnishings, depending on climate, construction type, and HVAC system operation; the webstore allows preview or full purchase.

Article from Green Building Advisor on strategies to take when building homes to reduce the need for air conditioning, including insulation, windows, site selection, and roofing.

The main principle of smart ventilation used in this study is to shift ventilation from time periods with large indoor-outdoor temperature differences, to periods where these differences are smaller, and their energy impacts are expected to be less.

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

Article describing earthship homes.

Bulletin describing the components of ECM motors and comparing their efficiency with PSC motors.

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.

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

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.

Technical report evaluating the energy savings potential of radiative cooling technologies, particularly photonic 'selective emittance' materials.

Searchable list of heat pumps that meet ENERGY STAR criteria.

Factsheet describing the benefits of purchasing and installing ENERGY STAR rated fans and ventilation products.

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.

Program criteria for residential exhaust fans used for ventilation.

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 describing the evaluation and selection of ventilation systems for homes retrofitted for energy aesthetic and health/safety improvements in Las Vegas.

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.

Document reviewing four cold-climate northern Illinois energy efficiency retrofit programs to identify practices, tools, and approaches to streamline and reduce costs of comprehensive retrofits, and to improve the consistency of audit and retrofit delivery practices across different programs.

Case study on exhaust ventilation and corresponding outdoor air intake strategies implemented in high-performance new-construction multifamily buildings.

Report detailing the effects of replacing PSC motors with more efficient, variable-speed motors.