This calculator estimates annual heating costs for various heating systems.

This calculator allows users to perform unlimited load calculations, with the option to purchase printable reports.

This website offers several free and purchasable load calculation tools.

This calculator allows energy professionals—such as contractors, advisors, and analysts—to evaluate the economic and environmental effects of green home and transportation upgrades.

This tool assists customers in estimating system sizing, pricing, and locating nearby installers while also recommending suitable Daikin systems.

This database is a centralized data repository that provides easy data upload and download for the nation's leading heat pump and heat pump water heater researchers. ​

This tool assists contractors in sizing heat pumps and will advise "Use Manual J" if the entered characteristics fall outside the recommended range.

This calculator estimates the annual and life cycle costs and savings associated with air source heat pumps.