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Document for contractors detailing how to prioritize, control, and configure heat pumps in a residence that uses two heating systems.

Webpage describing the functionality and benefits of switching to Air Source Heat Pumps, as well as linking to sets of products, rebates, most efficient ASHPs, and providing consumer aid for purchasing an ASHP.

Website highlighting the DOE Building Technologies Office Grid-interactive Efficient Buildings Initiative, including technical reports, other publications, resources, and presentations.

Report on performance of current diagnostics as well as a draft test method for use in future air flow evaluations.

Research study outlining results of monitoring a low temperature heat pump.

Factsheet describing how to partially install a heat pump in a manufactured home in the manufactured home factory.

Webpage with instructions for heat pump installers to choose the most suitable type of heat pump system, according to a project’s specific requirements.

Report providing information based on research and case studies, to remodelers and consumers about opportunities to increase home energy performance.

Report providing performance results of a home's heat pump water heater and whole-house dehumidifier over a six-month period.

Document detailing the requirements, roles, and obligations for participants in an organized effort, ensuring that HVAC installations comply with the ANSI/ACCA 5 QI – 2010 (HVAC Quality Installation Specification) QI Standard.

Webpage describing the successes and ongoing efforts of the Northwest Energy Efficiency Alliance's Go Ductless ductless heat pump program which successfully encouraged the installation of more than 150,000 minisplit heat pumps in the Northwest between 2010 and 2021.

Report describing information from DOE about rules and standards for residential air conditioners and heat pumps.

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.

Factsheet describing methods for securing HVAC units to avoid damage during an earthquake.

Report providing guidance on protecting foundation walls and enclosures from flood damage.

Fact sheet describing best practices in installing leak-free refrigerant systems, including specifics on creating flare joints and brazed joints, pressure testing, vacuum testing, and charging the system with refrigerant.

Report describing strategies to improve the aging steam heating systems in New York City to improve energy efficiency, reduce oil and gas usage, and cut maintenance costs.

Document for customers describing the benefits of two-system controls for homes, including information answering how, when, why, and how two-system controls with multiple heating sources are employed.