The Academy of HVAC Engineering - Offers advanced engineering training in the field of heating, ventilating and air conditioning systems. Provides details of courses, a training guide, Excel models and resources.

Air Conditioning and Refrigeration Industry Board - UK-based industry board representing air conditioning and refrigeration industries to the UK Government and European bodies.

DCS Pvt Ltd - Offers training programs on HVAC, electrical and building services, plumbing and process piping. Includes details of course content and starting dates. Located at Hyderabad, India.

Everything R744 - Provides information on CO2 technology for heating, cooling and refrigeration. Includes news, products, jobs, events, knowledge, forum, blog and a worldwide directory of partner companies.

Heat Pipe Technology, Inc. - Information about heat pipes and their use in dehumidification and heat recovery. Also describes company products.

Heating, Ventilation, Air Conditioning Documents - A collection of documents in PDF format about building design and related themes.

Hemmes Energietechniek - Offers a patented ventilation system with dehumidification of fresh air to reach humidity and indirect evaporative cooling to reach temperature. Dry air for pool and spa with heatpump.

High Performance HVAC - Provides detailed information concerning boilers, building automation, direct digital control (DDC), and HVAC preventive maintenance.

High Performance HVAC - Offers news, information, reviews and articles on air conditioning and heating, energy efficiency, indoor air quality and building automation systems.

HPAC Engineering - Trade journal for heating, piping and air conditioning with archive of all feature articles dating back to 1992 (download on purchase).

HVAC ProTech Archives - Categorized library of technical documents for HVAC technicians. Registration to forum required.

HVAC System - Blog about the technology of indoor environmental comfort, including the design and study of heating, ventilating and air conditioning units.

The HVAC Tool Box - Tools and basic information for engineering HVAC systems. Includes dimensions, materials, standards and system configurations.

HVAC Training - Offer videotapes on HVAC and other construction trades. We also offer CDROMS, books and manuals on HVAC, Electrical, Appliance Service and Plumbing.

International Centre for Indoor Environment and Energy - Based at Technical University of Denmark. Reports on research focusing on the effect of the indoor environment on humans, mainly thermal comfort and air quality.

Lars Josefsson: Steam Esteem in a Computerized World - Information for technicians and practicing engineers using marine boilers and heavy fuel oil burners. Includes data tables and shareware programs for heavy fuel oil properties' calculations.

National Institute of Service Technicians - Provides training in heating and air conditioning including maintenance, testing, troubleshooting, repairing or replacing HVAC equipment. Located in Orlando, Florida, USA.

Numerical Modeling of Cryocoolers - Presents theory and design of cryocoolers including Stirling machines and Pulse Tubes.

The Reed Institute - The Institute is located in Westfield, MA, USA and provides training on a variety of HVAC related topics, keeping engineers, contractors, and maintenance personnel up to date on building environmental control.

Refrige.com - Heating, ventilation, air conditioning and refrigeration industry news and relevant solutions for environmental and energy issues.

Refrigeration Service Engineers Society - Training and certification in all segments of the HVAC/R industry.

Rotational Phase Separation - University site on the principles of phase separation with the Rotational Particle Separator. Includes a calculator for designing a separator.

Ultimate Garage Heater - Garage heater calculator tool and extensive online information about workshop and garage heaters.