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Case Studies

This library contains research reports produced by the Building America program and other building science resources used to support this Solution Center. The materials cover both new construction and existing homes. Use the search box and/or the filters to explore hundreds of residential building resources. Access to some references not produced by Building America may require purchase from the publisher. Documents are listed alphabetically. While we continually update our database, links may have changed since posting. Please contact our webmaster if you find broken links.

Author(s): Logue, Turner, Walker, Singer
Organization(s): LBNL
Publication Date: August, 2015
Changing the air exchange rate of a home (the sum of the infiltration and mechanical ventilation airflow rates) affects the annual thermal conditioning energy. Large-scale changes to air exchange rates of the housing stock can significantly alter the residential sectorÕs energy consumption. However, the complexity of existing residential energy...
Author(s): Rapp, Less, Singer, Stratton, Wray
Organization(s): LBNL
Publication Date: August, 2015
The exhaust from residential combustion appliances contains air pollutants and high levels of moisture that must be conveyed to the outdoors to maintain acceptable indoor quality.
Author(s): Mittereder, Poerschke
Organization(s): IBACOS
Publication Date: June, 2017

This case study presents a cold-climate project that examines an alternative approach to ground source heat pump (GSHP) ground loop design. The innovative ground loop design is an attempt to reduce the installed cost of the ground loop heat exchange portion of the system by containing the entire ground loop within the excavated location...

Author(s): PNNL
Organization(s): PNNL, NREL
Publication Date: September, 2013

Case study of a DOE 2013 top innovation about best practices for high-efficiency window air conditioning units based on research by the National Renewable Energy Laboratory.

Author(s): PNNL
Organization(s): PNNL, LBNL
Publication Date: September, 2013

Case study on a DOE 2013 top innovation about high-performance furnace blowers for heating and cooling describing research by Lawrence Berkeley National Laboratory.

Author(s): PNNL
Organization(s): LBNL, BSC, FSEC, WSU Energy Office, Building Research Council, Southface, PNNL
Publication Date: December, 2014

Case study on a DOE 2014 top innovation on research that was instrumental in developing and gaining adoption of the ASHRAE 62.2 ventilation standard. The research and standards work was conducted by Lawrence Berkeley National Laboratory, and Building America research partners Building Science Corporation, Florida Solar Energy Center,...

Author(s): PNNL
Organization(s): CARB, ARBI, Davis Energy Group, PNNL
Publication Date: December, 2014

Case study on a DOE 2014 top innovation about research on high MERV filters used in HVAC systems conducted by Building America research partner Davis Energy Group.

Author(s): PNNL
Organization(s): LBNL, PARR, PNNL
Publication Date: December, 2014

Case study describing a DOE 2014 top innovation on development of a standardized testing method for testing the air leakage of HVAC air handlers and furnace cabinets developed by Lawrence Berkeley National Laboratory.

Author(s): Poerschke, Beach
Organization(s): IBACOS
Publication Date: February, 2016
Report onhow space-conditioning systems are operating in the field and if these systems are meeting required standards.
Author(s): Cummings, Withers, Kono
Organization(s): BA-PIRC
Publication Date: July, 2015
Report on variable-capacity air conditioning and heat pump units.
Author(s): Turner, Walker
Organization(s): LBNL
Publication Date: August, 2015
This study evaluates the energy, humidity and indoor air quality implications of residential ventilation cooling in all US IECC climate zones.
Author(s): BSC
Organization(s): BSC
Publication Date: November, 2013

Case study about a multifamily retrofit project using individual heat recovery ventilators in 10 separate building units.

Author(s): Williamson, Aldrich
Organization(s): CARB
Publication Date: August, 2015
Report on field monitoring of inverter-driven ASHPs in cold-climate homes.
Author(s): Less, Mullen, Singer, Walker
Organization(s): LBNL
Publication Date: August, 2015
This research study used pollutant measurements, home inspections, diagnostic testing and occupant surveys to assess IAQ in 24 new or deeply retrofitted homes designed to be high performance green buildings in California.
Author(s): Walker, Stratton
Organization(s): LBNL
Publication Date: August, 2015
Guidance on performance of current diagnostics as well as a draft test method for use in future air flow evaluations.
Author(s): NSTAR
Organization(s): NSTAR
Publication Date: May, 2014

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

Publication Date: October, 2015
Case study on using advanced controls to improve performance of combination space and water heating systems.
Publication Date: June, 2015
Case study on homes that have a single heating plant that provides space and water heating.
Author(s): CARB
Organization(s): CARB
Publication Date: November, 2013

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

Publication Date: August, 2015
Case study on heating loads for superinsulated buildings.
Publication Date: February, 2016
Case study on an effort to improve indoor air quality in high-performance, new construction, mutlifamily buildings, dedicated sources of outdoor air.
Publication Date: September, 2015
Case study describing how researchers monitored heat output and electricity consumption of air-source heat pumps
Publication Date: September, 2015
Case study on high-performance ducts in hot-dry and mixed-dry climates.
Author(s): CARB
Organization(s): CARB
Publication Date: May, 2014

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

Author(s): CARB
Organization(s): CARB
Publication Date: November, 2013

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

Publication Date: August, 2015
Report on the long-term monitoring of mini-split ductless heat pumps.
Author(s): CARB
Organization(s): CARB
Publication Date: November, 2013

Case study about maximizing efficiency of hydronic systems in single and multifamily buildings.

Author(s): PNNL
Organization(s): PNNL
Publication Date: August, 2012

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.

Author(s): ARIES
Organization(s): ARIES
Publication Date: May, 2014

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

Author(s): PNNL
Organization(s): PNNL
Publication Date: August, 2012

Case study about retrofitting a leaky air handler. 

Author(s): CARB
Organization(s): CARB
Publication Date: December, 2014

Case study aimed at helping contractors and building owners choose the best ventilation for existing homes.

Author(s): PARR
Organization(s): PARR
Publication Date: October, 2013

Case study about steam system balancing in multifamily housing.

Author(s): PARR
Organization(s): PARR
Publication Date: October, 2013

Case study that identifies 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.

Publication Date: September, 2015

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

Author(s): ARIES
Organization(s): ARIES
Publication Date: November, 2014

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%.

Author(s): Turner, Walker
Organization(s): LBNL
Publication Date: August, 2015
This study uses a computer simulation approach to examine the energy and indoor air quality implications of passive and hybrid ventilation systems.