​Heating, Ventilation, & Air Conditioning (HVAC)

Databases

California Energy Commission Library

DSIRE: Database of State Incentives for Renewables & Efficiency

EPA Web Archive

National Fire Protection Association (NFPA) Codes & Standards

Online Product Information (OPI) and Technical Data (Emerson Climate Technologies)

Journals/Periodicals/Magazines

ACHR NEWS (Online Magazine for HVAC Professionals)

ASHRAE Digital Journal (Access via Free Membership)

HVAC Insider Online

HVAC Journal (REHVA)

RSES Journal Archives

Reference/Information/Organizations

Air Conditioning Contractors of America Association (ACCA)

Air Conditioning, Heating, and Refrigeration Institute (AHRI)

Boyle's Law (Video by Khan Academy)

California Energy Commission

CaliforniaHVAC.com

Career Resources for HVAC Technicians (Explore the Trades)

Charles' Law (Video by Khan Academy)

Emerson Video & Webinar Library

Energy Saver

Energy Star

Environmental Design Library (UC Berkeley)

ESCO Institute (EPA Testing Information and Online Practice Tests)

Heating & Cooling 101

Home Energy Saver

HVAC Dictionary (REHVA)

HVAC Informational Glossary/Encyclopedia (Provided by Ra-Jac Air)

HVACR Business

HVACTalk.com

HydronicPros.com

IHS Engineering360

Learn HVAC (3D Simulation & Tutorial Tool)

New Equipment Digest

Rees Scholarship Foundation

The Science Behind Refrigeration (BERG)

Stick Meters (Fieldpiece)

The Greatest Engineering Achievements: Air Conditioning and Refrigeration (Timeline & History)

U.S. Environmental Protection Agency (EPA)

Willis Carrier: The "Father" of the Modern Air Conditioning