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.

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.

Report describing the best practices for the safe, efficient, and compliant installation of residential air source heat pump water heaters (HPWH) in California, aligning with the state's climate goals and providing guidance for educators, installers, and industry stakeholders.

AHRI-hosted directory of residential products meeting CEE's highest tier

Specification defining performance and reporting requirements to meet the voluntary “Cold Climate Air Source Heat Pump Specification” (ccASHP Specification) for air source heat pumps suited to heat efficiently in cold climates (IECC cz 4 and higher).

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

Report describing the cost-effectiveness and performance of all-electric, zero net energy multifamily buildings in California, detailing technical challenges and providing recommendations for design, construction, codes, standards, and operations to support future projects.

Report describing the features, benefits, and best practices for the design and installation of heat pump water heaters in new low-rise multifamily buildings, highlighting their efficiency, reliability, and contribution to decarbonization goals.

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

ENERGY STAR webpage describing how a heat pump water heater works.

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

Report describing the identification of barriers and proposed practical solutions for the design, installation, and market adoption of heat pump water heaters in new low-rise multifamily housing, focusing on studio and one-bedroom units.

Report describing research conducted to support California’s Title 24, Part 6 Building Energy Efficiency Standards by analyzing the impact of installation location and ventilation on heat pump water heater (HPWH) performance, emphasizing the need for proper installation to maximize efficiency...

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 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.

Fact sheet describing four different efficient hot water delivery (HWD) systems, the trunk-and branch, core, whole-house manifold, and recirculation, with emphasis on system schematics, piping materials, and regulations to design and verify the systems.