Library

Research project aimed to verify whether homes in the New Jersey HPwES program achieved 30% source energy savings, and if so, what measures were implemented to achieve them.

Report including an overview of the buried duct research and information the retrofit methodology used to install and test the three existing duct systems, including short- and long-term data collection.

Information sheet describing refrigerant line installation and system startup procedures.

Document presenting results from testing prototype HVAC duct system designs that would locate the entire length of duct work within the air and thermal barriers of the building envelope. These include one that incorporated a high-side supply register, one that utilized a single soffit located within...

Webpage describing a DOE Cold Climate Heat Pump Challenge. The challenge engages industry partners and focuses around the Cold Climate Heat Pumps, a more environmental and efficient heating alternative to traditional heating.

Research study identifying the best performing, most energy-efficient and cost- effective techniques to provide controlled mechanical ventilation and humidity control in hot- humid climates with thermally efficient building envelopes.

Presentation providing information about correctly installing ductwork in new and existing homes.

Report aimed at gaining a better understanding about benefits, challenges and technologies associated with natural gas feedback systems.

Report evaluating mechanical AC precooling strategies in homes as a method for improving the load factor by shifting cooling operation from on-peak to off-peak hours.

Research study about a high performance retrofit of an existing brick building (a former convent) into condominiums, all affordable housing.

Report describing procedures for increasing sensible efficiencies through increased flow rates across the air handling unit and increased indoor coil sizes.

This project analyzed combined condensing water heaters or boilers and hydronic air coils to provide high efficiency domestic hot water (DHW) and forced air space heating. Called "combi" systems, they provided similar space and water heating performance less expensively than installing two...

Report about cost effective energy-efficient upgrades that can be implemented in the hot, dry Southwest climate.

This research paper outlines residential HVAC advanced controls and sensors. It includes a technology review, applications, maintenance and commissioning, occupant behavior and a summary of the state-of-the-art technologies for advanced controls for residential HVAC.

Document reviewing current and potential ventilation technologies for residential buildings with particular emphasis on North American climates and construction.

Information sheet about HVAC equipment design to maximize energy efficiency in the hot-dry climate zone.

Web page providing an overview of room-level air conditioning systems such as window units and mini-splits.

Report describing construction of test homes in Atlanta, GA meeting Building America savings targets and serving as a basis of design for other homes Martin Dodson plans to build within the Serenbe community.

Fact sheet outlining the research behind how smart ventilation controls boost energy efficiency and indoor air quality, including research findings from seasonal temperature, timer, and real-time weather-based controls showing that all three systems showed potential for energy savings while...

Report addressing barriers to information, contractor resources and cost savings associated with steam balancing multifamily buildings.

Report about results of 10 test buildings in Chicago, studied to identify best practices for methodology, typical costs, and energy savings associated with steam system balancing.

Report providing information based on research and case studies, to remodelers and consumers about opportunities to increase home energy performance.

Report about the impact on the loads when common safety factors are applied to the load calculation process using two houses that meet the 2009 IECC prescriptive path modeled as the accurate baseline.

Document covering the pros and cons of compact air distribution systems and the decision criteria that must be considered early in the whole-house design process.

Report describing the equipment selection of a split system air conditioner and furnace for an example house in Chicago, Illinois, as well as a heat pump system for an example house in Orlando, Florida.

Report describing findings from research related to heating, ventilation, and air conditioning (HVAC) companies that have made the decision to transition to whole house performance contracting (WHPC).

Report providing performance results of a home's heat pump water heater and whole-house dehumidifier over a six-month period.

Report on a project conducted to better understand the current usage of thermostatic radiator valves by key market players in steam and hot water heating and to conduct limited experiments on the effectiveness of new and old thermostatic radiator valves as a means of controlling space temperatures...

Report about partnership to build three communities of net zero houses.

Presentation report detailing Heat Pump Water Heater (HPWH) interaction with space conditioning systems in real-life test scenarios that explains some of the problems arising from these interaction and information that can be used to make the system more efficient.

Report discussing the measured variability in indoor space temperatures in a set of 60 homes located in Florida, New York, Oregon, and Washington.

Fact sheet describing the results of an analysis of humidity control and variable refrigerant flow (VRF) system efficiency in three new multifamily buildings in New York, NY.

Information sheet about proper ventilation and air sealing.

Report summarizing NRELs efforts to develop diagnostic test cases to conduct accurate energy simulations when phase change materials (PCMs) are modeled in residential buildings.

Report describing concentrations of 54 volatile organic compounds (VOCs) and ventilation rates that were measured in four new manufactured houses over 2 - 9.5 months following installation and in seven new site built houses 1 - 2 months after completion.

Factsheet describing the importance of system charging, superheat and subcooling.

Document about proper HVAC system sizing.

Report outlining the features of a test house built in Silver Spring , Maryland, and discussing the implementation of the energy efficient design, and reports on the short-term testing results.

Article describing sustainable community development of near zero energy homes in Greenfield, Massachusetts.