Case Studies

Case study describing a building project in the mixed-humid climate zone.

Case study describing two new construction projects in Florida built to be net zero energy homes.

Case study describing a building project in the marine climate.

Case study describing the first multifamily projects nationwide to be certified under the U.S. Department of Energy's Zero Energy Ready Home program.

Case study describing the construction of prototype zero energy ready high-performance manufactured homes in the Pacific Northwest.

Case study describing a building project in the hot-humid climate zone.

Case study describing a building project in the hot-humid climate zone.

Case study describing the origins and growth of a Los Angeles-based home performance company that has increased their annualized revenues by nearly 8 times in 2 years of business.

Case study describing the origins and operation of a Kalamazoo-based home performance contractor.

Case study describing the origin and operations of a large HVAC company specializing in whole-house energy efficiency that upgrades 400 homes per year.

Case study describing the growth and performance of a Rochester-based home energy performance company that increased revenues by nearly 2000% in 1 year.

Case study describing the growth of the home performance division of a Oregon-based remodeling company that saw revenues increase by 109% per year from 2006 to 2012.

Case study describing the growth of a Decatur-based home performance company, that started as an off shoot of a design-build firm and has since increased their number of projects by 53% in 2 years.

Case study describing the growth of a Manassas-based home performance company that increased their annual number of projects from 13 to 79 between 2007 and 2012.

Case study describing the New American Home project.

Case study describing a panelized construction method for stud walls with continuous rigid foam insulation.

Case study describing the use of advanced controls to improve the performance of combination space-and-water-heating systems.

Case study describing homes that have a single heating plant that provides space and water heating.

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 heating loads for super-insulated buildings.

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

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

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 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 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.