HARDI is an association dedicated to advancing the science of wholesale distribution in the HVACR industry. HARDI members market and distribute heating, refrigeration, air conditioning equipment and supplies, sheet metal, controls, filters and related items.

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.

HBB Pro Sales Group Inc. is a representative of high quality HVAC/R products lines in Ohio, Kentucky, Indiana, Michigan, Western Pennsylvania, and West Virginia.

Health and Safety Executive (HSE) is the national independent watchdog for work-related health, safety and illness. Their mission is to prevent death, injury and ill health in Britain's workplaces. They are an independent regulator and act in the public interest to reduce work-related death and serious injury across Great Britain’s workplaces.

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.

Hitachi Rail is a fully integrated, global provider of rail solutions across rolling stock, signaling, operation, service & maintenance, digital technology and turnkey solutions.

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.

HVAC RepCo is an independent rep agency for manufacturers of heating, ventilation, air-conditioning (HVAC) equipment, controls, valves & actuators, sensors & thermostats, variable frequency drives, fabric ductwork, refrigeration, parts, accessories and hand tools. The team at HVAC RepCo is uniquely positioned to professionally represent the premier manufacturers in the HVACR industry.

IFC Certification Ltd is a UKAS accredited and internationally recognized provider of high quality customer focused independent third party certification. IFC Certification Ltd is also a Notified Certification Body for certificating products for CE Marking under the Construction Products Directive.

The Independent Contractors Exchange (ICE) is a select group of independent HVAC contractors specializing in the service and installation of applied HVAC systems.

International Accreditation Forum (IAF) is the world association of Conformity Assessment Accreditation Bodies. Its primary function is to develop a single worldwide programme of conformity assessment, which reduces risk for business and its customers by assuring them that accredited certificates may be relied upon.

The International Environment Agency (IEA) is the global energy authority, providing data, analysis, and solutions on all fuels and all technologies. They help governments, industry, and citizens make good energy choices.

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.

Koch Air, LLC has been a privately owned, full service distributor of Carrier, Bryant, and Payne residential and commercial HVAC equipment, parts, supplies and tools. Other lines include Totaline, Honeyell, Aprilaire, NuCalgon, Modine, Takagi, Slant/Fin, and many more.

Linear Air Diffusers are specialists in commercial grade aluminum linear slot diffusers, linear bar grilles, and custom plenums. They have been manufacturing air diffusion products such as: Air Grilles, Registers, and Diffusers (GRD’s) for over 40 years. Their business model is based on devoted investments with the use of modern robotics manufacturing, 3D rapid prototyping, computational fluid dynamics simulations (CFD), and BIM.

Lobell Sales, LLC represents quality manufacturers servicing wholesale distributors and OEM's in the HVAC/R, appliance parts, electrical, and plumbing industries in Alabama, Arkansas, Florida Panhandle, Louisiana, Mississippi, and Tennessee.

Mitsubishi Heavy Industries, Ltd. delivers innovative and integrated solutions across a wide range of industries from commercial aviation and transportation to power plants and gas turbines, and from machinery and infrastructure to integrated defense and space systems.

MJM Associates is a multi-line field sales and marketing agency representing quality HVAC/R manufacturers throughout the Rocky Mountain States.

The Mobile Air Conditioning Society (MACS) Worldwide is a pioneer trade association for manufacturers, service repair and distribution for the vehicle air conditioning industry.

NAEIR is a national nonprofit organization that takes in donations of excess inventory and redistributes those goods to schools and nonprofit organization.

The National Board of Boiler and Pressure Vessel Inspectors was created in 1919 to promote greater safety to life and property through uniformity in the construction, installation, repair, maintenance, and inspection of pressure equipment.

National Center for Construction Education and Research (NCCER) is a not-for-profit education foundation created in 1996, as The National Center for Construction Education and Research. NCCER develops standardized construction and maintenance curriculum and assessments with portable credentials.

The Occupational Safety and Health Act of 1970 established NIOSH as a research agency focused on the study of worker safety and health, and empowering employers and workers to create safe and healthy workplaces. NIOSH is part of the U.S. Centers for Disease Control and Prevention, in the U.S. Department of Health and Human Services. It has the mandate to assure “every man and woman in the Nation is safe and in healthy working conditions.

Norman S. Wright provides customers with exceptional systems knowledge to meet all project requirements. They represent HVAC manufacturers worldwide, and their product lines support the latest energy, sustainability and comfort standards.

NAIMA is a non-profit certification program for technicians in the heating, ventilation, air-conditioning, and refrigeration (HVACR) industry and the only test supported by the entire industry.

OpenTherm is a non-manufacturer-dependent system of communication between modulating HVAC appliances and room thermostats. It consists of a communication protocol and an interface specification. The OpenTherm communication protocol is primarily designed to control modulating heating appliances. The protocol is available to members of the OpenTherm Association only.

The Perfect Technician Academy is a school for Heating, Ventilation, and Air Conditioning (HVAC), created out of the need for a fast-track training program that could develop students ready to perform at high levels entering the skilled trades industry. They are committed to training and preparing heating, ventilation and air conditioning (HVAC) technicians for successful careers.

Qolsys Inc is a pioneer residential and commercial security and smart-home manufacturer. They provide smart thermostat, video monitoring, energy management and home automation.

Reacond Associates is a company that works towards selling and partnering with huge HVAC brands and supports the success of their customers and manufacturers.

Rhodes and Stafford is a company that serves as a representative of companies like Diversitech, Southwark Metals, Berry Global, J. P. Lamborn, Uni-Weld, Hardcast, Glasfloss Industries, Honeywell Genesis Cable, Truaire, Soler&Palau, Fujitsu, JB Ind., Builder's Best, Pro1, Trion.