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Library

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.

Showing results 1 - 39 of 39

A Realistic Hot Water Draw Specification for Rating Solar Water Heaters

Author(s)
Burch Jay,
Thornton Jeff
Organization(s)
National Renewable Energy Laboratory,
NREL,
Thermal Energy System Specialists,
TESS
Publication Date
Document outlining the current and the proposed draws and estimates typical ratings changes from draw specification changes for typical systems in four cities.

Assessing the Energy Savings of Tankless Water Heater Retrofits in Public Housing

Author(s)
Dwiantoro Deny,
Walters R,
Ries R
Organization(s)
Building Energy Efficient Homes for America,
BEEHA,
National Renewable Energy Laboratory,
NREL,
U.S. Department of Energy,
DOE
Publication Date
Report describing methodology, analysis, and findings from a case study of a 110-unit retrofit of gas tankless water heaters in a hot/humid climate in Alachua County, Florida.

Bay Ridge Gardens - Mixed Humid Affordable Multifamily Housing Deep Energy Retrofit

Author(s)
Lyons James,
Moore Mike,
Thompson Margo
Organization(s)
Building America Partnership for Improved Residential Construction,
BA-PIRC,
Newport Ventures,
U.S. Department of Energy,
DOE
Publication Date
Report summarizing commissioning, short-term testing, utility bill data analysis, and results of on-site monitoring of a deep energy retrofit.

Benefits of Demand-Controlled Pumping

Author(s)
Acker Larry,
Klein Gary
Organization(s)
Home Energy Magazine,
Taco Comfort
Publication Date
Article describing how demand plumbing systems send cold water back to the water heater until hot water arrives at the sink, shower or other fixture where it is needed.

Best Practices for the Retrofit Installation of Heat Pump Water Heaters

Author(s)
Richard Health & Associates
Organization(s)
RHA
Publication Date
Report describing the best practices for the safe, efficient, and compliant installation of residential air source heat pump water heaters (HPWH) in California, aligning with the state's climate goals and providing guidance for educators, installers, and industry stakeholders.

Comparison of Advanced Residential Water Heating Technologies in the United States

Author(s)
Fang Xia,
Maguire Jeff,
Wilson Eric
Organization(s)
National Renewable Energy Laboratory,
NREL,
U.S. Department of Energy,
DOE
Publication Date
Research report providing a comparison of the most common residential water heating technologies to determine energy-efficient and cost-effective water heating technologies are when subjected to a variety of typical operating conditions.

Condensing Hybrid Water Heater Monitoring Field Evaluation

Author(s)
Maguire Jeff,
Earle Lieko,
Booten Chuck,
Hancock C E
Organization(s)
Mountain Energy Partnership,
National Renewable Energy Laboratory,
NREL
Publication Date
Report about a hybrid condensing water heater (thermal efficiency = 0.973, energy factor = 0.95) installed in an occupied home in Sacramento, California, and monitored for one year to determine the actual in situ efficiency.

Expert Meeting Report: Exploring the Disconnect Between Rated and Field Performance of Water Heating Systems

Author(s)
Hoeschele Marc,
Weitzel Elizabeth
Organization(s)
Alliance for Residential Building Innovation,
ARBI,
Davis Energy Group,
U.S. Department of Energy,
DOE
Publication Date
The main objective of this expert meeting was to bring together a group of experts intimately involved with issues related to assessing the performance of residential high efficiency water heating systems.

Fixing an Expansion Tank with Excess Water

Author(s)
PEX Universe
Organization(s)
PEX Universe
Publication Date
A webpage discussing how water heater expansion tanks operate and how to repair them.

Gas-fired Water Heaters, Volume III, Storage Water Heaters with Input Ratings Above 75,000 Btu per Hour, Circulating and Instantaneous (ANSI Z21.10.3:19/CSA 4.3:19)

Author(s)
American National Standards Institute
Organization(s)
ANSI,
CSA Group
Publication Date
Standard that applies to storage water heaters, instantaneous water heaters, and circulating water heaters including booster water heaters; the current version of this standard was published in the year 2019 and it is available for purchase along with a digital preview on the ANSI webstore page.

General Solar Thermal Specification

Author(s)
Aldrich Robb
Organization(s)
Consortium for Advanced Residential Buildings,
CARB,
Steven Winter Associates,
SWA
Publication Date
Brochure on specifications for solar thermal systems.

Heat your Water with the Sun

Author(s)
National Renewable Energy Laboratory
Organization(s)
NREL
Publication Date
Provides consumers with general information on solar water heating systems and how to select a contractor.

Hot Water Distribution System Model Enhancements

Author(s)
Hoeschele Marc,
Weitzel Elizabeth
Organization(s)
Alliance for Residential Building Innovation,
ARBI,
National Renewable Energy Laboratory,
NREL,
Davis Energy Group
Publication Date
Report on a project that enhanced the HWSIM distribution system model to more accurately model pipe heat transfer.

Insulate Steam Distribution and Condensate Return Lines

Author(s)
U.S. Department of Energy
Organization(s)
DOE
Publication Date
Fact sheet describing principles of insulating steam distribution and condensate return lines as an effective way to prevent energy loss.

Low-Cost Solar Water Heating Research and Development Roadmap

Author(s)
Hudon Kate,
Merrigan Tim,
Burch Jay,
Maguire Jeff
Organization(s)
National Renewable Energy Laboratory,
NREL
Publication Date
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.

Mass Save Deep Energy Retrofit Builder Guide, GM-1302

Author(s)
Neuhauser Ken,
Gates Cathy,
Pettit Betsy
Organization(s)
Building Science Corporation,
BSC
Publication Date
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.

Measure Guideline: Transitioning to a Tankless Water Heater

Author(s)
Brozyna Kevin,
Rapport Ari
Organization(s)
Integrated Building and Construction Solutions,
IBACOS,
National Renewable Energy Laboratory,
NREL,
U.S. Department of Energy,
DOE
Publication Date
Document developed to help residential builders and retrofitters transition from tank-type water heaters to tankless water heaters.

Mechanical Insulation Design Guide - Installation

Author(s)
National Mechanical Insulation Committee
Organization(s)
NMIC
Publication Date
Web resource that lays out the pre-work considerations, methods and finishes for installing mechanical insulation.

Overheating in Hot-Water and Steam-Heated Multifamily Buildings

Author(s)
Dentz Jordan,
Henderson Hugh,
Podorson David
Organization(s)
Advanced Residential Integrated Energy Solutions,
ARIES,
Levy Partnership,
National Renewable Energy Laboratory,
NREL,
U.S. Department of Energy,
DOE
Publication Date
Report providing information to researchers, utility program managers, and building owners interested in controlling heating energy waste and improving resident comfort.

Performance of Combination Hydronic Systems

Author(s)
Butcher Thomas
Organization(s)
American Society of Heating Refrigerating and Air-Conditioning Engineers,
ASHRAE
Publication Date
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.

Residential Solar Hot Water Systems

Author(s)
North Carolina Solar Center
Organization(s)
North Carolina State University
Publication Date
Brochure with information on residential solar hot water systems.

Retrofitting Combined Space and Water Heating Systems: Laboratory Tests

Author(s)
Bohac Dave,
Schoenbauer Ben,
Hewett Martha,
Huelman Patrick H
Organization(s)
NorthernSTAR Building America Partnership,
NorthernSTAR,
National Renewable Energy Laboratory,
NREL,
University of Minnesota,
UMIN
Publication Date
Report presenting results of a laboratory experiment studying combi systems as a mode to eliminate safety issues associated with natural draft appliances.

ReVision Home: Tankless Water Heater

Author(s)
Consortium for Advanced Residential Buildings,
Steven Winter Associates
Organization(s)
CARB,
SWA
Publication Date
Information sheet describing tankless hot water heating systems in existing homes.

Revisions to the SRCC Rating Process for Solar Water Heaters

Author(s)
Burch Jay,
Huggins Jim,
Long Steven,
Thornton Jeff
Organization(s)
National Renewable Energy Laboratory,
NREL,
Solar Rating & Certification Corporation,
SRCC,
Thermal Energy System Specialists,
TESS
Publication Date
Document discussing changes in testing the annual performance ratings for solar water heaters.

Side-by-Side Testing of Water Heating Systems: Results from 2009 - 2010 Evaluation

Author(s)
Colon Carlos J,
Parker Danny S
Organization(s)
Florida Solar Energy Center,
FSEC,
Building America Partnership for Improved Residential Construction,
BA-PIRC,
U.S. Department of Energy,
DOE
Publication Date
Report comparing the performance of seven differing types of residential water heating systems in a side-by-side test configuration over a full year period.

Smart Water Heater Pilot

Author(s)
Northwest Energy Efficiency Alliance
Organization(s)
NEEA
Publication Date
Website providing consumers with resources to find, select and install heat pump water heaters.

Solar Water Heaters

Author(s)
U.S. Department of Energy
Organization(s)
DOE
Publication Date
Website describing how solar water heaters -- also called solar domestic hot water systems -- can be a cost-effective way to generate hot water for your home.

Strategy Guideline: Proper Water Heater Selection

Author(s)
Staller J,
Springer David,
German Alea,
Hoeschele Marc,
Zhang Y
Organization(s)
Alliance for Residential Building Innovation,
ARBI,
National Renewable Energy Laboratory,
Davis Energy Group,
U.S. Department of Energy,
DOE
Publication Date
Report about proper water heater selection developed to provide step-by-step procedures for evaluating preferred cost-effective options for energy efficient water heater alternatives based on local utility rates, climate, and anticipated loads.

Tankless Water Heating Gas Piping Facts

Author(s)
Rheem
Organization(s)
Rheem
Publication Date
Information for properly sizing gas lines for use with tankless water heaters and other gas appliances.

Using Solar Hot Water to Address Piping Heat Losses in Multifamily Buildings

Author(s)
Springer David,
Seitzler Matt,
Backman Christine,
Weitzel Elizabeth
Organization(s)
Alliance for Residential Building Innovation,
ARBI,
National Renewable Energy Laboratory,
NREL,
Davis Energy Group,
U.S. Department of Energy,
DOE
Publication Date
Report on investigating the effectiveness of using solar thermal water heaters to address heat losses from piping while recirculating water in multifamily buildings.

Validation of a Hot Water Distribution Model Using Laboratory and Field Data

Author(s)
Backman Christine,
Hoeschele Marc
Organization(s)
Alliance for Residential Building Innovation,
ARBI,
National Renewable Energy Laboratory,
NREL,
Davis Energy Group,
U.S. Department of Energy,
DOE
Publication Date
Research study comparing TRNSYS Type 604 pipe model against laboratory pipe heat loss test data and detailed field monitoring data.

Why Add a Tank to a Tankless Water Heater?

Author(s)
Chandler Michael
Organization(s)
Fine Homebuilding Magazine
Publication Date
Article about one way to deal with the cold-water surprise effect of tankless water heaters.