NATE is an independent, third-party certification body for HVAC/R technicians. NATE tests technicians; others train. Testing validates the technician's knowledge and a training program's instruction. NATE-approved testing organizations throughout the U.S. and Canada offer NATE tests. Candidates can earn installation and/or service certification in five specialty areas: air-conditioning, air distribution, heat pumps, gas heating & oil heating.

NATE's HVAC and HVAC/R testing validates the technician's knowledge and a training program's instruction. The NATE tests are rigorous, multiple-choice, knowledge-based tests that represent what 80% of technicians have an 80% chance of encountering once a year.

ENERGY STAR is a joint program of the U.S. Environmental Protection Agency and the U.S. Department of Energy helping us all save money and protect the environment through energy efficient products and practices.

Results are already adding up. Americans, with the help of ENERGY STAR, saved enough energy in 2007 alone to avoid greenhouse gas emissions equivalent to those from 27 million cars - all while saving $16 billion on their utility bills.

ACCA is a group of over 4,000 air conditioning contractors who work together to improve our industry, promote good practices, and keep homes and buildings safe, clean and comfortable.

They all share one goal: to make the HVACR industry, and every professional contracting business, more successful.

How do they do it? By bringing customers together with other contractors through unique learning opportunities. They provide exclusive technical, legal, and marketing resources. They bring customers to you and they fight aggressively for your business interests in Washington, DC.

With roots stretching back nearly a century, ACCA is the only nationwide organization of, by and for the small businesses that design, install and maintain indoor environmental systems.

For 75 years, RSES has offered educational and certification programs to HVACR professionals of all experience levels. As the leading provider of educational meetings, seminars and workshops, RSES also provides technical examination programs and training courses for service professionals working on heating, ventilation, air conditioning and refrigeration systems across the nation.