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

Due North creates refrigerated, retail merchandising solutions that maximize our customers’ success. The company was formed in 2022 by combining long-standing retail refrigeration companies Minus Forty, QBD, and MTL COOL into one organization.

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.

DunAn Sensing offers high-performance OEM pressure sensors, transducers, and transmitters with MEMS packaging technology compatible with harsh media.

Dundas Jafine Inc. is a manufacturer of insulated duct, caps, exhaust hoods, dryer venting products and accessories.

Since 1928, Dunkirk has delivered innovative, efficient, and dependable home heating products to professionals, building owners, and homeowners. Their products inventory includes condensing boilers, water boilers, water heaters, storage tanks, thermostats and multiple boiler control units.

Dunphy Combustion designs and manufactures advanced industrial and commercial combustion systems, including burners, boilers, and control solutions for high efficiency and low emissions. A recipient of the King's Award for Enterprise: Innovation 2025, Dunphy is recognised for pioneering energy-efficient technologies that support cleaner, more sustainable industrial heating.

Dunster Heat is based in the South West and is a nationwide biomass supplier and installer of vigas wood burning boilers and Akvaterm accumulators. Their biomass systems are combined to form an efficient biomass central heating system.

Dupont provides technology-driven solutions to its customers. From renewable energy sources like photovoltaics, wind, biofuels, and fuel cells to the application of advanced materials making the exploration, production, and transportation of oil and gas more efficient, Dupont’s products and services help provide better performance, reliability, lower cost, improved safety, and a reduced environmental footprint.

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.

Durakerb is part of Econpro, a specialist group of companies that transform waste and by-products into sustainable products and solutions. Durakerb manufactures lightweight and recycled products and systems that provide for a safer, greener, faster, and easier solution to kerbing and kerb-side drainage. They provide with the opportunity to design and construct with responsibility.

DuraPlas, Inc. has been developing new and innovative agricultural products for companies around the world. From Liquid Feed Wheels and Mini-Pallets to containers and flooring systems, products help customers move, feed, and handle their products and livestock easier, faster, and more efficiently.

Duratrac, Inc. provides a host of professionally engineered connectors designed to perform optimally with your residential and commercial gas and water heater applications. All Duratrac flex features durable stainless steel construction without tapering at the ends to help insure optimal flow, while our end fittings and valves are zinc iridate plated to prevent corrosion

DuraVent is the recognized technological leader in the venting industry. Consistently first to market with new innovations, DuraVent is committed to providing safe and technologically advanced venting.

Durex Industries is the designer and manufacturer of high quality electric industrial heaters, temperature sensors, temperature controls and process systems.

Duro Dyne Canada Inc. manufactures and distributes the most complete line of sheet metal accessories and equipment for the heating, ventilating and air conditioning industry in Canada.

Duroair has fast become a pioneer in innovative airflow and air filtration technology. Duroair designs and manufactures flexible end-to-end clean air solutions, focusing on (i) painting and coating, (ii) dust and particulate collection, (iii) weld smoke and oil mist collection, (iv) positive and negative pressure clean rooms, (v) environmental isolation rooms and (vi) non-destructive testing applications.

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.

Duyar Valve have been trying to be of the highest quality, the most reliable, and the most innovative since 1965! They set out as a metalworks workshop half-century ago. They grew, as the housing, business, and shipbuilding sectors grew and laid the foundations for today. Currently, they continue to move forward with their central production facilities extending over about 15 thousand square meters of indoor area in Esenyurt, Istanbul.

Dwyer Instruments Inc. are manufacturers of multiple products from different markets like HVAC, building automation, valve automation, etc. Their products include gauges for pressure, flow, level and temperature.

DXV offers exceptional bathroom and kitchen collections that reimagine the most influential and beautiful design movements of the past 150 years.

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.

DYSK PLC is a specialist supplier of air conditioning products and services, with over 100 years of combined experience in providing specialist advice, design assistance and first class pre and post sales technical support to the industry.

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 Flow Technologies is a global company which produces the energy efficient fan-packs for a vast variety of AC & EC motor solutions and a quick return on investment for HVAC, refrigeration, ventilation and engine cooling industries.

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.

E-Lins Technology was established in 1999, which is the major professional manufacturer and solution provider in wireless M2M/IoT/In-Vehicle. E-Lins mobile data products covers 4G/3G/2G/WiFi routers, modems, CPE, and other data transmission devices, which are widely used in more than 150 countries and regions, and more than twenty industrial fields, such as power control, water schedule, traffic, oil field, weather forecast, etc.

Eagle Disinfection is responsible for providing marketing, distribution and customized solutions tailored to the client’s needs and is equipped to facilitate installation and maintenance services on all Puradigm products. Puradigm is the world’s most validated purification technology for combating dangerous surface and air contaminants safely in populated environments 24/7.