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Guide by the Northeast Energy Efficiency Partnerships on how to size heat pumps in a cold climate.

Article from Williams College on the key elements of passive solar design for homes.

A research paper exploring the design, installation, repair and maintenance of solar water and pool heating technologies.

2012 edition of code establishing minimum regulations for mechanical systems, including heating, cooling, ventilation, exhaust, ducts, fireplaces, combustion and hydronic systems, using prescriptive and performance-related provisions.

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

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

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.