Library

Performance rating standards for unitary air-conditioners and unitary air-source heat pumps, including definitions, classifications, testing, rating, and operating requirements, as well as minimum data requirements for published ratings and markings.

Guidebook covering basic principles and data used in the HVAC&R industry. This is the 2023 edition of the handbook, which can be purchased physically or digitally at the reference link in versions using either I-P units of measurement or SI units of measurement.

This is a federal tax credit for complying air source heat pumpe. Units located in the "North" must meet ENERGY STAR's cold climate heat pump criteria.

Factsheet describing mini split heat pumps and their benefits for consumers.

Webpage providing basic information on various types of heat pumps and their applications in Massachusetts.

Web article describing two options for sizing ductless minisplit heat pumps, including a free HVAC sizing tool.

Database compiling extended capacity data for numerous cold climate heat pump manufacturers and models.

Fact sheet providing information on window attachments and their potential for improving energy efficiency.