The Air-Conditioning, Heating, and Refrigeration Institute (AHRI) is the trade association representing manufacturers of air conditioning, heating, commercial refrigeration, and water heating equipment. The association's 300+ member companies produce more than 90 percent of the residential and commercial air conditioning, heating, water heating, and commercial refrigeration equipment made in North America.

Associated Builders and Contractors (ABC) is a national association with 70 chapters representing more than 21,000 merit shop construction and construction-related firms with nearly two million employees. ABC's membership represents all specialties within the U.S. construction industry and is comprised primarily of firms that perform work in the industrial and commercial sectors of the industry.

Founded in 1915, the Association for Facilities Engineering is the oldest and most experienced Facilities Maintenance & Engineering organization in the world. AFE provides education, certification, technical information and other relevant resources for plant and facilities operations, engineering and maintenance professionals worldwide.

COSA is a not for profit organization that provides educational programs in the areas of carbon monoxide and combustion analysis. These programs are provided to people in the medial field, first responders, and the mechanical trades.

They license HVAC software for Apple and Android-based mobile devices that simplify field-based calculations. They also offer customized software for large HVAC manufacturers and utilities.

Ascente service contractor software is an integrated solution that serves the plumbing, HVAC, and refrigeration service contractor markets. Ascente is a Microsoft windows-based business and services management system. As an integrated suite of application software, Ascente handles every aspect of the HVAC service, plumbing service, refrigeration service, and construction contractor requirements.

What is the Cryogenic Society of America The only full-time technical and trade association concerned solely with cryogenics, cryogenic engineering and the cryogenic industry. We publish Cold Facts magazine six times per year and the CryoChronicle enewsletter monthly.

SAM Pro Enterprise provides an integrated service management, wireless workforce and job cost accounting software for service, construction and national accounts.

Harry Eklof & Associates Inc. is a manufacturer representative. They offer training services and also connect the user to the following products: Plumbing, HVAC, Bath Fixtures, Sump Sewage, Tools.

The Heat Exchange Institute (HEI) is a non-profit trade association committed to the technical advancement, promotion, and understanding of a broad range of utility and industrial-scale heat exchange and vacuum apparatus. The primary purpose of HEI is to develop and publish standards which advance the technology, increase the efficiency, and promote the use of heat exchange and vacuum apparatus.

The Home Ventilating Institute (HVI), is a nonprofit association of manufacturers of residential ventilation products. HVI provides creditable product performance ratings including airflow, sound and energy.

Hugh M. Cunningham Companies offers premier sales representation to all distribution sectors of the HVAC and Refrigeration markets in the US States of Texas, Louisiana, New Mexico, Oklahoma and Arkansas.

IAQA is dedicated to bringing practitioners together to prevent and solve indoor environmental problems for the benefit of consumers and the public.

A nonprofit association founded in 1909 comprising over 2,100 district energy and CHP system managers, engineers, consultants and equipment suppliers from 25 countries.

International Facility Management Association (IFMA) is the world's largest and most widely recognized international association for facility management professionals, supporting over 23,000 members in more than 10​0 countries.

ITI supports apprenticeship and advanced career training for union workers in the sheet metal industry throughout the United States and Canada. Located in Fairfax, Virginia, the ITI produces a standardized curriculum supported by a wide variety of training materials free of charge to apprentices and journey-level workers who work in the following specialized disciplines: Architectural Sheet Metal, Building Information Modeling,& HVAC Service.

JayKay Sales Company is an HVAC manufacturer's representative agency dedicated to providing professional, competent, and courteous sales and service support to customers of the high-quality manufacturers we represent.

LouisianaGroup offers premier sales representation to all sectors of the HVAC and Refrigeration markets throughout the state of Louisiana. AccountManagers are dedicated to customers' needs and are supported by market and sales specialists.

The North American Electric Reliability Corporation (NERC) is a not-for-profit international regulatory authority whose mission is to assure the reliability and security of the bulk power system in North America. NERC develops and enforces Reliability Standards; annually assesses seasonal and long‐term reliability; monitors the bulk power system through system awareness; and educates, trains, and certifies industry personnel.

Mfrs. reps. covering six New England states and calling on hydronic, HVAC, burner supply and plumbing/heating wholesale distributors for residential and commercial applications.

Founded in 1968, HRAI is a non-profit trade association of manufacturers, wholesalers and contractors in the Canadian heating, ventilation, air conditioning and refrigeration (HVACR) industry. HRAI advocates a safe, responsible and fair industry where indoor environment systems and refrigeration processes are designed, installed and serviced by qualified professionals in order to ensure efficient and energy-conscious operation.

The Testing, Adjusting and Balancing Bureau (TABB) is an organization made up of top heating, ventilating, air conditioning and refrigeration professionals. Since 1981, TABB has set the certification standards for the HVAC industry. TABB is the first and only HVAC testing, adjusting and balancing certification program accredited by the American National Standards Institute (ANSI).

Thermco is the area’s premier agency representing manufacturers in the sale of heating, ventilating, refrigeration, air conditioning and plumbing products