Case Studies

Case study describing air sealing building enclosures using aerosolized sealant.

Case study describing research about spray foam roof insulation and moisture management.

Case study describing a heating system retrofit in an existing apartment building complex which included advanced boiler controls and reduced heating gas consumption by about 20%.

Case study describing how using buried and/or encapsulated ducts can reduce duct thermal losses in existing homes.

Case study describing optimal design and limitations of cladding attachments over exterior sheathings.

Case study describing a method for evaluating safe installation and operation of combustion appliances in homes undergoing energy efficiency upgrades where indoor air is used for combustion and venting.

Case study describing combustion safety testing as an important step in upgrading for energy efficiency.

Case study describing the elimination of excessive humidity in the attic of a multi-floor, single-family home that was causing condensation and water damage along the roof and eaves.

Case study describing an effort to improve indoor air quality in high-performance, new construction, multifamily buildings through dedicated sources of outdoor air.

Case study describing the most cost-effective ways to reduce duct leakage in low-rise housing units.

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

Case study describing installation of exterior rigid foam insulation on a slab foundation.

Case study describing the performance of heat pump water heaters compared to electric resistance water heaters.

Case study describing how researchers monitored heat output and electricity consumption of air-source heat pumps

Case study describing an experiment to build and instrument unvented test roofs using air-permeable insulation in a cold climate and to analyze the moisture effects over time.

Case study describing field testing of an unvented roof with fibrous insulation and tiles.

Case study describing best practices for using rigid foam sheathing as a drainage plane in new and retrofit wall construction.

Case study describing how heat pump water heaters can be cost-effective alternatives to traditional electric resistance water heaters.

Case study describing the performance of high-performance ducts in hot-dry and mixed-dry climates.

Case study describing steps for properly designing a hydronic system for setback operation, which are applicable to new construction and retrofit applications.

Case study describing the moisture content in homes with double wall framing.

Case study describing a package of energy- efficiency measures for new manufactured homes in the Pacific Northwest, including triple-pane highly efficient windows.

Case study describing how to decrease indoor moisture using an air conditioning unit with a dehumidifier in hot-humid climates.

Case study describing field study of gas furnaces, and recommendations for installation.

Case study describing methods to retrofit foundations and basements in climate zones 6 and 7.

Case study describing the incorporation of insulating concrete forms (ICFs) into new home design and construction.

Case study describing investigations of wind washing in 56 homes; recommendations for cost-effective retrofits and tips for new construction.

Case study describing the long-term monitoring of mini-split ductless heat pumps.

Case study describing low-load options in heating, ventilation, and air conditioning equipment used in multifamily homes.

Case study describing research about using exterior, vapor permeable insulation of retrofit walls with vapor permeable cavity insulation.

Case study describing the maximization of hydronic system efficiency in single and multifamily buildings.

Case study describing a six month study that monitored performance of a heat pump water heater.

Case study desscibing direct current power optimizers and microinverters.

Case study describing the measurement of envelope leakage in multifamily buildings.

Case study describing techniques used to prevent thermal bypass in new homes.

Case study describing how a properly designed duct system is essential for keeping a home comfortable, managing indoor air quality, and maximizing the performance of heating and cooling equipment.

Case study describing a raised ceiling duct strategy tested in New Smyrna, Florida.

Case study describing how to replace variable speed furnace motors.

Case study describing the benefits of replacing resistance heating systems with mini-split heat pumps in cold and mixed-humid climates.

Case study describing how combination space and water heating systems can be used in homes with efficient thermal enclosures, decreasing energy consumption and costs.

Case study describing retrofit measures for embedded wood members in insulated mass masonry walls.

Case study describing the retrofit of a leaky air handler.

Case study describing methods to seal crawl spaces in cold climate homes with integrated whole-house ventilation systems.

Case study describing ventilation selection for existing homes.

Case study describing a stand-off furring strategy that minimizes the physical connections to each existing wall stud, uses spray foam to encapsulate existing siding materials (including lead paint), and creates a vented rain screen assembly to promote drying.

Case study describing the best practices, costs, and savings associated with balancing steam distribution systems through increased main line air venting, radiator vent replacement, and boiler control system upgrades.

Case study describing a structural sheathing product composed of enhanced EPS rigid foam with OSB adhered on one side.

Case study describing the effectiveness of various ventilation systems at two unoccupied, single-family lab homes at the University of Texas at Tyler.

Case study describing lessons learned from production builders who install efficient hot water delivery systems.

Case study describing a Habitat for Humanity zero net energy home in Denver.