DUCTZ has been providing industry-leading air duct cleaning and HVAC restoration services for residential and commercial properties alike.

Duke Energy is one of the largest energy holding companies in the United States. Its Electric Utilities and Infrastructure business unit serves approximately 7.5 million customers located in six states in the Southeast and Midwest.

Duncan Supply Company, Inc. is a wholesale distributor of refrigeration, air conditioning and heating, & food service equipment & parts,

Duquette Refrigeration has provided commercial refrigeration and HVAC service, installation, and 24/7 emergency repair to businesses throughout New England since 1986.

Duracool Airconditioning intends to serve and achieve goals with technological superiority and provide top performance, application versatility and reliability. Their corporate values are the foundation upon which the company is built. These values are timeless and transcend all service lines, business and household environments.

Dura Products, Inc is a state-of-the art Indiana based manufacturer of metering, pumping and dispensing systems for the DEF, AG, and turf Chemical industries. Founded by owners with decades of knowledge in farming and the chemical sales industry, Dura Products Inc goes beyond excellent design to incorporate innovative, versatile and durable transfer pump solutions with the end consumer always in mind.

Durkee® is a multi-national high-tech enterprise with a focus on offering solutions of high quality elastomeric thermal insulation, customized fabric air ducting and A/C system integration in the HVAC/R industry over the past 25 years.

Dust Free manufactures a wide variety of air purification equipment designed to help allergy patients in both residential and business locations. They also provide Ultra-violet (UVC) residential and commercial fixtures, Electrostatic air filters, room air purifiers, ceiling mounted air purification systems, industrial fan powered air cleaners, ultra-violet light fixtures and many more.

Founded in 1859, the Deutscher Verein des Gas- und Wasserfaches is the German association for gas and water with headquarters in Bonn. Its official English translation is the German Technical and Scientific Association for Gas and Water.

Dynamic Air Quality Solutions manufactures residential, commercial, and industrial high-performance IAQ systems that remove ultrafine particles, odors and gas phase contaminants, without Ozone.

Dynamic Filtration manufactures robust, industrial-grade EDM filters, long lasting cellulose industrial fluid filters and several popular waterjet filters.

Dynatemp International, Inc. is a privately held supplier of refrigerants and refrigerant recovery services. Dynatemp offers the HVAC/R market a portfolio of products, services, and market intelligence that is designed to increase long-term profitability, customer loyalty, and environmental stewardship.

E + E Elektronik Ges.m.b.H develops and manufactures sensors, transmitters, hand-helds and data loggers for relative humidity, moisture in oil, dew point, air velocity, flow, CO2, temperature and pressure. E+E operates a nationally accredited calibration lab and is appointed to maintain the National Standard for Humidity and Air Flow Speed in Austria.

E Instruments International by Sauermann designs, manufactures and markets a complete range of innovative instrumentation solutions encompassing Combustion Gas Analyzers, Emissions Analyzers, Indoor Air Quality, and Calibration equipment especially designed for the power, process, industrial, institutional, food, and HVAC markets.

The E.ON Group is one of Europe's largest operators of energy networks and energy infrastructure and a provider of innovative customer solutions for 50 million customers. Thus, they are decisively driving forward the energy transition in Europe and are committed to sustainability, climate protection, and the future of the planet.

Compressed air is one of the most expensive forms of energy and yet its consumption represents an unknown quantity in many industrial companies. Use of flow meters for compressed air measurement can help to significantly reduce energy costs and forms an important basis for investment decisions.

Eagle Mechanical, Inc. is a HVAC, plumbing, process and piping mechanical contractor with 30+ years’ experience. They help customers to purchase, install, maintain or replace any heating, air conditioning, refrigeration and plumbing systems. They specialize in industrial and commercial facilities, like hospitals, office buildings, schools, and government facilities.

East Coast Metals products, professional service centers, and technical support combine to give the user exceptional service before, during, and after the sale. They are dedicated to fulfilling this commitment every single day. Their mission is to deliver the quality HVAC products the user needs, when they need them, and provide expert technical support.

East Hill Heating & Cooling is family owned and operated, providing King County, Puyallup, Sumner, Kent, Renton, Covington, Maple Valley, Auburn, And Federal Way with standard heating and Cooling service since 1939.

Eastern Refrigeration Supply Co. Inc. are HVAC/R wholesale distributor serving southwestern Pennsylvania for over 70 years. They provide commercial refrigeration, heating and air conditioning solutions.

Eastside Heating & Air Conditioning, Inc., was started in 1966 by Vern Stoelting with a mission of furnishing his customers with the best in customer service and satisfaction. In 1969 Doug Turner joined Eastside as a service tech and later became a partner. Vern retired in 1981. In 1980 Randy Burke came to work at Eastside becoming a partner a few years later.

With over 20 years’ experience, EasyAir has an in-depth knowledge of saving their clients' energy by designing and installing heat recover systems. They also provide unique, site specific commercial kitchen heat & smoke extract, fume extract, dust extract, paint & varnish fume extract as well as bespoke turnkey air conditioning systems.

Easyflex is the leader of all things flexible. We’re a global leading manufacturer and distributor of flexible, corrugated stainless steel products. Through technological innovation, attention-to-detail, and stringent quality control, we manufacture and deliver superior products to customers worldwide.

ECCO Heating Products Ltd. was incorporated in 1960 with the vision of becoming the best in sheet metal manufacturing as well as the distribution of Heating, Ventilation, Air Conditioning (HVAC) and related products.

ECO Manufacturing provides Thermostats, controls and much more.

Eco UK Group, originally established as Lutterworth Electrical in 1971, provides electrical services to the domestic and agricultural markets. Driven by the demand for high quality, energy efficient industrial luminaires, they provide high performance turn key solutions, LED lighting solutions, energy saving solutions and electrical contractor services.

Based in Warminster, United Kingdom, Ecobubl design and supply renewable energy solutions. They offer product training courses for air source heat pumps, electric & heat batteries, and also mixergy hot water tank. They also offer solar PV and electric battery storage Installations, throughout Wiltshire, Dorset, Somerset and parts of Hampshire, in the UK.

Ecohillers have been Involved in a wide range of applications and markets. have the knowledge of what works and what questions to ask to ensure optimal operation and integration of system.

Founded in 1976, ECOFIT which became ROSENBERG VENDÔME, designs, manufactures and sells electrical motors and fans. Since 40 years, our specific know-how in electrical motors and fans provides an expertise to offer smart solutions for any ventilation application.

EcoFlow Tech is a revolutionary mobile power company that is reinventing the way the world accesses energy. As makers of industry-first, smart and powerful mobile power products, EcoFlow’s mission is to harness new technologies to foster inclusion and help raise standards of living in areas of the world where power shortages stunt economic growth and development.