Library

Fact sheet describing principles of insulating steam distribution and condensate return lines as an effective way to prevent energy loss.

Fact sheet describing the newly developed Ventilation-Integrated Comfort System (VICS) that reduces space requirements and eliminates costly ductwork for separate heating, cooling, and ventilation systems, all while enhancing performance, addressing the demand for energy-efficient homes, and...

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.

This webpage provides an interactive walk-through of the installation of a heat pump water heater in a home in Massachusetts, including how-to videos of the installation, video interviews with the homeowners, installer, and utility program partners, and visual tours of the home before and after...

Report describing the results of a 21-home field study investigating the effectiveness and failure rates of whole-house mechanical ventilation systems installed in Florida homes over the last 15 years.

Report covering reservoir claddings, back ventilation and vapor throttles.

Report discussing how to create livable space in the attic that meets IRC code requirements by either creating a ventilated roof assembly, or and unvented attic assembly.

Blog article citing the risks and downsides of attic ventilation fans from a building science perspective.

Report targeting the growing number of homes utilizing deep retrofit measures and new construction practices to realize sufficiently lower infiltration levels that require mechanical ventilation as prescribed by ASHRAE Standard 62.2.

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 describing research conducted to support California’s Title 24, Part 6 Building Energy Efficiency Standards by analyzing the impact of installation location and ventilation on heat pump water heater (HPWH) performance, emphasizing the need for proper installation to maximize efficiency...

PDF literature review of the impact and need for attic ventilation in Florida homes.

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.

News article describing the state of the residential battery storage market.

This webpage provides an interactive walk-through of the installation of a heat pump water heater in a home in Maine, including how-to videos of the installation, video interviews with the homeowners, installer, and utility program partners, and visual tours of the home before and after installation...

Report focusing on managing the driving forces that move air and water vapor across the building envelope.

Guidebook providing useful examples of high performance retrofit techniques for the building enclosure of wood frame residential construction in a cold and somewhat wet climate.

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.

Report describing the installation and operation of forced-air heating and domestic hot water combi systems in residential homes.

Report describing the use of passive vents as a source of outdoor air in multifamily buildings.

This document addresses adding—or improving—mechanical ventilation systems to existing homes. The purpose of ventilation is to remove contaminants from homes either directly or by dilution. This report discusses where, when, and how much ventilation is appropriate in a home, including some...

Document developed to help residential builders and retrofitters transition from tank-type water heaters to tankless water heaters.

Guide describing proper application, design, and installation of mechanical ventilation cooling systems for homes located in hot-dry and cold-dry climates, as well as a means of understanding the benefits, costs, and tradeoffs of these systems.

Report describing the most cost-effective ventilation and indoor air quality solutions for multifamily homes that meet ASHRAE 62.2-2016.

Web resource that lays out the pre-work considerations, methods and finishes for installing mechanical insulation.

Standard establishing a test procedure for evaluating the performance of air-cleaning devices as a function of particle size. This is the current version of the standard, which was published in the year 2017, and is available for preview and purchase at the reference link. The ASHRAE bookstore also...

This paper discusses model validation using data from three thermosiphon systems.

Document describing a hygrothermal modeling study, including all of the US climate zones, a range of interior humidity levels and numerous arrangements and types of insulation.

Report detailing a three-winter study on unvented roof assemblies in a cold climate, assessing insulation material, ridge diffusion vent presence, vapor control membranes, relative humidity, and interstitial airflow. Results indicate that utilizing air-permeable fibrous fill insulations in unvented...

Report detailing a three-winter study on unvented roof assemblies in a cold climate, assessing insulation material, ridge diffusion vent presence, vapor control membranes, relative humidity, and interstitial airflow; results indicate that utilizing air-permeable fibrous fill insulations in unvented...

Study in which a central heat pump water heater system was monitored in detail and used to create a model for assessing similar systems in various climates.

Research study examining the performance of existing multifamily ventilation central systems and explored alternative solutions in retrofit situations.

DOE Energy Saver webpage providing a brief summary of natural ventilation for houses.

Document describing recommended modeling rules, potential compliance credits, and eligibility criteria for residential night ventilation cooling systems for California’s Title 24 energy efficiency standards.

Newsletter providing news and information to members of the New Jersey National Guard.

Fact sheet describing a novel, simplified air delivery system using a plug-and-play model that features 3-inch diameter flexible ducts, efficient fittings, and a simplified installation process that resulted in successful market engagement through commercialization.

Report providing information to researchers, utility program managers, and building owners interested in controlling heating energy waste and improving resident comfort.

Report describing a field study to measure pollutant concentrations in 324 homes in California.

Article from Smarter Homes NZ on home building techniques that incorporate passive cooling.

Book describing passive cooling techniques from a technical and academic perspective.

Website providing guidance on passive heating, cooling, and lighting methods.

Article from Williams College on the key elements of passive solar design for homes.

Paper summarizing passive and low-energy cooling systems for buildings.

Article investigating how a linear input/output relationship can be used as a simple model of the performance of a combination hydronic heating system over heating only, DHW only, and combined loads.

Information sheet providing guidance about the placement of ventilation approaches.

Blog article describing considerations for how to use trees for shading to reduce cooling energy demand.

Report describing the key findings from the first third-party field validation of 120-volt heat pump water heater (HPWH) technology, addressing the significant barriers to their adoption and emphasizing their potential role in reducing carbon emissions from residential water heating.

Report describing a laboratory assessment on the performance of Rheem 120-volt heat pump water heaters (HPWH), aimed at identifying optimal installation locations for these new "plug-in" models based on comprehensive testing under various conditions.

Report reviewing the design and the first four months of energy performance of a near zero energy project home in Callaway, Florida during the second half of 2008.