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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 - 49 of 49

Sizing a New Water Heater

Author(s)
US Department of Energy
Organization(s)
U.S. DOE
Publication Date
Information sheet describing how to select a properly sized water heater based on household usage patterns, peak demand, and heater type—whether tankless, solar, or storage-based—to ensure efficiency and adequate hot water supply.

Ground Source Integrated Heat Pump for Near Zero Energy Houses: Technology Status Report.

Author(s)
Murphy Richard W,
Rice C Keith,
Baxter Van D,
Craddick William G
Organization(s)
U.S. Department of Energy,
DOE,
Oak Ridge National Laboratory,
ORNL
Publication Date
Report describing the ground-source IHP (GS-IHP) design and includes the lessons learned and best practices revealed by the research and development (R&D) effort throughout.

Residential Cold Climate Heat Pump Challenge

Author(s)
U.S. Department of Energy
Organization(s)
DOE
Publication Date
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.

Building Science Education: Heat Pump Water Heater Training Module

Author(s)
U.S. Department of Energy
Organization(s)
DOE
Publication Date
Training module describing the operation, efficiency, consumer and seller benefits, and cost comparison of Heat Pump Water Heaters (HPWH) against conventional gas, oil, or electric water heaters.

Central Heat Pump Water Heater Design Guide

Author(s)
Ecotope
Organization(s)
Energy Trust of Oregon
Publication Date
Design guide providing solutions and tools for designing central heat pump water heater systems in multifamily and other commercial buildings.

Plug-In Heat Pump Water Heater Field Study Findings & Market Commercialization Recommendations

Author(s)
Khanolkar Amruta,
Egolf Mischa,
Gabriel Noah
Organization(s)
New Buildings Institute,
NBI
Publication Date
Report describing the key findings from the first third-party field validation of 120-volt heat pump water heater (HPWH) technology, addressing the significant barriers to their adoption and emphasizing their potential role in reducing carbon emissions from residential water heating.

Evaluation of Unitary Heat Pump Water Heaters with Load-Shifting Controls in a Shared Multifamily Configuration

Author(s)
Hoeschele Marc,
Haile James,
Grant Peter
Organization(s)
Pacific Gas and Electric Company,
PG&E,
Energy Transition Coordinating Council,
ETCC
Publication Date
Report describing the performance, cost, and carbon impacts of unitary heat pump water heaters with load-shifting controls in a shared configuration for a multi-family project, highlighting significant savings in energy usage, CO2 emissions, and utility costs.

Understanding HPWH Interaction with Space Conditioning Systems in the Field

Author(s)
Larson Ben
Organization(s)
Ecotope,
American Council for an Energy-Efficient Economy,
ACEEE
Publication Date
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.

Heat Pump Retrofit Strategies for Multifamily Buildings

Author(s)
Steven Winter Associates,
Natural Resources Defense Council
Organization(s)
SWA,
NRDC
Publication Date
Report describing the various heat pump retrofit options for multifamily buildings in the U.S., segmented by building typology and heating system, to support better environmental, economic, and health outcomes.

Evaluating Moisture Control of Variable-Capacity Heat Pumps in Mechanically Ventilated, Low-Load Homes in Climate Zone 2A

Author(s)
Martin Eric,
McIlvaine Janet E R,
Chasar Dave,
Beal David,
Withers Charles R
Organization(s)
Building America Partnership for Improved Residential Construction,
BA-PIRC,
Florida Solar Energy Center,
FSEC
Publication Date
This report evaluates the performance of variable-capacity comfort systems, with a focus on inverter-driven, variable-capacity systems, as well as proposed system enhancements.

Interaction between Heat Pump Water Heaters or Other Internal Point Source Loads and a Central Heating System

Author(s)
Widder Sarah H,
Metzger Cheryn E,
McIntosh Joshua A,
Petersen Joseph M
Organization(s)
Northwest Energy Efficiency Alliance,
NEEA,
Pacific Northwest National Laboratory,
PNNL
Publication Date
Report describing the objective evaluation of space conditioning interactions between heat pump water heaters and home heating systems during winter 2016-2017, revealing a smaller than anticipated impact on space conditioning loads.

Retrofitting Forced Air Combi Systems: A Cold Climate Field Assessment

Author(s)
McAlpine Jake,
Bohac Dave,
Schoenbauer Ben,
Hewett Martha,
Rothgeb Stacey
Organization(s)
NorthernSTAR Building America Partnership,
NorthernSTAR,
University of Minnesota,
UMIN
Publication Date
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...

Multifamily Heat Pump Water Heater Evaluation

Author(s)
Alliance for Residential Building Innovation,
National Renewable Energy Laboratory
Organization(s)
ARBI,
NREL
Publication Date
Study in which a central heat pump water heater system was monitored in detail and used to create a model for assessing similar systems in various climates.

Cooling and Heating Season Impacts of Right-Sizing of Fixed- and Variable-Capacity Heat Pumps With Attic and Indoor Ductwork

Author(s)
Cummings James B,
Withers Charles R,
Kono Jamie E
Organization(s)
Florida Solar Energy Center,
FSEC,
U.S. Department of Energy,
DOE,
Building America Partnership for Improved Residential Construction,
BA-PIRC
Publication Date
Report on experiments comparing the cooling and heating seasonal and peak demand performance of different variable-capacity air conditioning and heat pump units.

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.

Heat Pump Water Heater Model Validation Study

Author(s)
Ecotope,
Northwest Energy Efficiency Alliance
Organization(s)
Ecotope,
NEEA
Publication Date
Report describing the significant potential for energy use reductions through heat pump water heaters, which have been a crucial part of Northwest power plans for decades and have recently achieved substantial savings with new integrated models and climate specifications.

Mini-Split Heat Pumps Multifamily Retrofit Feasibility Study

Author(s)
Dentz Jordan,
Henderson Hugh,
Podorson David
Organization(s)
Advanced Residential Integrated Energy Solutions,
ARIES,
Levy Partnership,
U.S. Department of Energy,
DOE,
National Renewable Energy Laboratory,
NREL
Publication Date
This report investigates whether mini-split heat pumps can live up to their potential for one market segment: multifamily retrofits.

Energy Savings and Peak Demand Reduction of a SEER 21 Heat Pump vs. a SEER 13 Heat Pump with Attic and Indoor Duct Systems

Author(s)
Cummings James B,
Withers Charles R
Organization(s)
Building America Partnership for Improved Residential Construction,
BA-PIRC,
Florida Solar Energy Center,
FSEC
Publication Date
Research study describing experiments run in an unoccupied 1600 square foot house to evaluate the delivered performance as well as the relative performance of a SEER 21 variable capacity heat pump versus a SEER 13 heat pump.

Measured Performance of a Low Temperature Air Source Heat Pump

Author(s)
Johnson R K
Organization(s)
Consortium for Advanced Residential Buildings,
CARB,
Steven Winter Associates,
SWA,
U.S. Department of Energy,
DOE
Publication Date
Research study outlining results of monitoring a low temperature heat pump.

Systems Evaluation at the Cool Energy House

Author(s)
Puttagunta Srikanth,
Williamson James
Organization(s)
Consortium for Advanced Residential Buildings,
CARB,
Steven Winter Associates,
SWA,
U.S. Department of Energy,
DOE
Publication Date
Report providing performance results of a home's heat pump water heater and whole-house dehumidifier over a six-month period.

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.

Efficient Multifamily Homes in a Hot Humid Climate by Atlantic Housing Partners

Author(s)
Chasar Dave,
Martin Eric
Organization(s)
Building America Partnership for Improved Residential Construction,
BA-PIRC,
Florida Solar Energy Center,
FSEC
Publication Date
Report demonstrating how the initiative achieves Building America (BA) goals of 30%-50% energy savings in multifamily dwellings in the hot-humid climate zone.

Ductless Mini-Split Heat Pump Comfort Evaluation

Author(s)
Roth Kurt,
Sehgal N,
Akers Craig
Organization(s)
Fraunhofer Center for Sustainable Energy Systems,
Fraunhofer CSE,
National Renewable Energy Laboratory,
NREL
Publication Date
Research report with results from field tests in two homes in Austin, Texas, from October 2011 to June 2012 to evaluate the comfort performance of ductless mini-split heat pumps

Improved Modeling of Residential Air Conditioners and Heat Pumps for Energy Calculations

Author(s)
Cutler Dylan,
Winkler Jon,
Kruis Neal,
Christensen Craig B,
Brandemuhl Michael J
Organization(s)
National Renewable Energy Laboratory,
NREL,
University of Colorado,
CU
Publication Date
Report presenting improved air conditioner (AC) and heat pump (HP) modeling methods in the context of whole-building simulation tools.

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.

A Feasibility Study: Ductless Hydronic Distribution systems with Fan Coil Delivery

Author(s)
Springer David,
Dakin Bill,
Backman Christine
Organization(s)
Alliance for Residential Building Innovation,
ARBI,
National Renewable Energy Laboratory,
NREL,
Davis Energy Group
Publication Date
Research study estimating potential energy savings relative to conventional ducted air distribution, and identifying equipment requirements, costs, and barriers.

An In-Depth Look at Ground Source Heat Pumps and Other Electric Loads in Two GreenMax Homes

Author(s)
Shapiro Carl,
Puttagunta Srikanth
Organization(s)
Consortium for Advanced Residential Buildings,
CARB,
Steven Winter Associates,
SWA,
National Renewable Energy Laboratory,
NREL
Publication Date
Report about two test home evaluations that provided valuable data about the true in-field performance of various building mechanical systems and LAMELs.

Measure Guideline: Heat Pump Water Heaters in New and Existing Homes

Author(s)
Shapiro Carl,
Puttagunta Srikanth,
Owens Douglas
Organization(s)
Consortium for Advanced Residential Buildings,
CARB,
National Renewable Energy Laboratory,
NREL,
Steven Winter Associates,
SWA
Publication Date
Document with evaluation of 14 heat pump water heaters (including three recently released HPWH products) installed in existing homes in the northeast region of the United States.

Strategy Guideline: HVAC Equipment Sizing

Author(s)
Burdick Arlan
Organization(s)
Integrated Building and Construction Solutions,
IBACOS,
National Renewable Energy Laboratory,
NREL,
U.S. Department of Energy,
DOE
Publication Date
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.

Residential Ground Source Heat Pumps with Integrated Domestic Hot Water Generation: Performance Results from Long-Term Monitoring

Author(s)
Stecher Dave,
Allison Katherine
Organization(s)
Integrated Building and Construction Solutions,
IBACOS,
National Renewable Energy Laboratory,
NREL,
American Society of Heating Refrigerating and Air-Conditioning Engineers,
ASHRAE
Publication Date
Report discussing instrumentation methods and field operation characteristics of two GSHPs in test houses, including a comparison between the manufacturers listed COP values and the COPs calculated from field data.

NREL Delivers In-Home HVAC Efficiency Testing Solutions

Author(s)
National Renewable Energy Laboratory,
U.S. Department of Energy
Organization(s)
NREL,
DOE
Publication Date
Document on the development of two simple in-home efficiency test methods that can be used by technicians, researchers, or interested homeowners to verify the correct operation and energy efficiency of a homes air conditioning and heating equipment.

Field Monitoring Protocol: Mini-Split Heat Pumps

Author(s)
Christensen Dane,
Tomerlin Jeff,
Winkler Jon,
Hancock Ed,
Fang Xia
Organization(s)
National Renewable Energy Laboratory,
NREL,
Mountain Energy Partnership,
U.S. Department of Energy,
DOE
Publication Date
Information sheet with an analysis of mini split heat pump systems.

WPPI GreenMax-Scheller Residence: Near Zero Energy Monitoring Summary

Author(s)
Consortium for Advanced Residential Buildings,
Steven Winter Associates
Organization(s)
CARB,
SWA
Publication Date
Research study describing demonstration homes that provided a wealth of information for the building community in terms of the science, effort, and cost of increasing the energy efficiency of our nation's housing stock.

Strategies for Energy Efficient Remodeling: SEER 2003 Case Study Report

Author(s)
Drumheller S Craig,
Wiehagen Joseph
Organization(s)
NAHB Research Center,
National Renewable Energy Laboratory,
NREL
Publication Date
Report providing information based on research and case studies, to remodelers and consumers about opportunities to increase home energy performance.