The ICRA is an association dedicated to promoting good standards of quality remanufacturing, ethical business practice and in providing education and training to its members for their benefit and to the air-conditioning and refrigeration service industry at large.

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 Environmental Corporation (IEC) are manufacturers of hydronic fan coil systems for hospitality, multi-family, healthcare, and education. They also offer replacement and retrofit solutions for fan coils in applications where limiting downtime is crucial to a business’ success.

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.

International Ground Source Heat Pump Association is an association of companies, professionals and users dedicated to promoting the science, utility and use of geothermal (ground source) heating and cooling technology.

The International Institute for Sustainable Laboratories (I2SL) is devoted to the principles of sustainable laboratories and related high-technology facilities, from design to engineering to operation. Through worldwide partnerships and the exchange of technical expertise, I2SL will encourage the development of high-tech facilities that address the rapid pace of science, medicine, research, and development in a dynamic environment.

IIAR is the world's renowned advocate for the safe, reliable and efficient use of ammonia and other natural refrigerants. IIAR members share their collective knowledge and experience to produce consensus documents that address various aspects of the natural and industrial refrigeration industry. IAR sets the standard for providing advocacy, education and the most up-to-date technical information to the ammonia and natural refrigeration community.

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.

International WELL Building Institute (IWBI) is the global authority for transforming health and well-being in buildings, organizations, and communities around the world. IWBI's mission is to lead the global movement for putting people first in business decision-making and culture.

The International WELL Building Institute (IWBI) is the movement to promote health and wellness in buildings and communities everywhere. IWBI delivers the WELL Building StandardTM, and a professional suite of tools to empower the global community. They believe that buildings should be developed with people's health and wellness at the center of the design.

Interplay Learning is a software company with a mission to deliver scalable and effective trades training. Interplay Learning creates modules and training for multiple industries including HVAC.

Since 1919, Intertherm has been an integral part of improving the comfort of manufactured homes. They are the only heating and cooling manufacturer to be certified in Demand Flow Technology.

InviAir is a manufacturer of wall and ceiling air diffusers and grilles for HVAC systems. The innovative, flush-mount process allows products to blend discreetly into the interior architecture unlike anything else on the market. Founded by HVAC professionals with over forty years of experience in the industry, InviAir is dedicated to offering some of the best air diffusers and grilles worldwide.

Established to serve wholesale distribution, iO HVAC Controls offers unique products from multiple sources for a variety of applications. From wireless relays to fresh air ventilation controls, the company's solutions are designed to be easy to install, cost-effective and profitable.

IonicBlue® is a joint venture between Johnson Controls, the global pioneer in delivering energy and infrastructure solutions, and Apollo Global Management a leading, global alternative asset manager. They deliver a total solutions approach through the expertise of Johnson Controls and the unmatched ability of Apollo to provide alternative capital solutions.

Iowa Precision Industries is a leader in automated HVAC coil lines, duct fabrication systems, seam closers and corner inserters – a company with a rich history that has the experience and proven know-how to develop systems meeting the specific production goals of customers – worldwide. The Fabriduct(R), ProFabriduct(R), Ductomatic, Cornermatic(R), Whisperloc(R), and Elbowmatic machines are the industry’s finest products.

Irr Supply Centers, Inc. is a renowned distributor of Plumbing, Heating, Cooling, Electrical, and Refrigeration products serving a wide range of customers throughout Western/Central New York and Northern Pennsylvania.

IDC has several designers on staff, each holding various certifications with The Irrigation Association in drip/micro systems, sprinkler systems, and surface irrigation methods. They provide air vents, pumps, pressure regulators, filters, valves, and much more.

Isaac Heating & Air Conditioning is one of the largest privately-owned HVAC contractors in the United States. They offer residential and commercial installation and servicing of heating and air conditioning equipment. Their products inventory includes boilers, air conditioners, heat pumps, humidifiers, dehumidifiers, thermostats and water heaters.

Industrial distributors focus on product knowledge and expertise while bringing the customer a massive line of name-brand, quality products.

ISC Sales Inc. provides superior industrial products to a wide variety of end-users and original equipment manufacturers (OEM). They offer a broad range of climate control products for electrical enclosures, such as air conditioners, vortex coolers, air to air heat exchangers, purge & pressurization units, filtered fans, and thermoelectric coolers.

ISCO Industries is a global customized piping and other HVAC solutions provider based in Louisville, Kentucky, USA. ISCO stocks and sells a wide variety of piping materials and provides solutions for various environmental, geothermal systems, industrial, landfill, mining, municipal, nuclear, waterworks and culvert-lining applications worldwide.

Island Heating & Air Conditioning provide services for all AC maintenance and furnace repair needs. They also deal with AC Installation, AC Repair Service, Complete AC Replacement, Furnace Maintenance, Heat Pump Maintenance, and Heat Pump Installation.

Islandaire is a manufacturer of through-the-wall replacement air conditioners and heat pumps, including PTACs, VTACs, water source heat pumps and gas units.

ISM manufactures Spiral Tubeforming Equipment utilizing state-of-the-art technologies to deliver the best Spiral Tubeformer in the industry and offer Spiral Fitting machines featuring Gorelockers, Stitchwelders, Oval and Flanging machines.

ISS Mechanical is a 'Service First' Mechanical Contractor. They specialize in the service, maintenance, repair and replacement of air conditioning, chillers, controls and refrigeration equipment for existing Commercial, Healthcare and Industrial Facilities. Their service area is Central Florida, with offices in Orlando and Tampa, Florida. They are able to provide mission critical and emergency service to facilities throughout Central Florida.

IVATION™ isn’t about products, it’s about passions and the people driven by them. In their world, trite is non-existent because they believe their customers are insightful and will recognize and appreciate the authenticity of their talent displayed in their products. They’re not about technical jargon or phrases, rather they’re about the products and ideas that inspired people to create them.

With 10-years’ experience in hand tools, IWISS has become a leading manufacturer of high-quality, user friendly and ergonomic cable tools and pipe tools for professional users.

J & J Air Conditioning provides comprehensive HVAC services to commercial and industrial clients. They utilize evolving technology to find new and innovative ways to serve their customers.

J Flow Products is a parts and service provider. They give their customers good quality parts, tools and supplies at a fare price to help them do there job better and easier. The products include HVACR, Automotive and Specialty Products.