Weiss instruments manufacturers Thermometers, Humidity Indicators and Pressure Gauges and is based out of USA

Thermostats, gas valves, ignition controls and igniters, Filter Driers, Expansion Valves, and Solenoid Valves for heating, air conditioning, refrigeration and IAQ.

William Tao & Associates, Inc. (WTA) is a multi-discipline engineering firm providing innovative services in engineering and energy-effective building systems. WTA provides a wide range of engineering services including mechanical, electrical, plumbing, fire protection, building automation, structural, civil, master planning, and commissioning

Wolfe Innovations prides itself in being the best overall in HVAC customer service, low competitive prices, and trustworthiness.

Wright Sales is a premier manufacturer's sales agency for the HVAC/R industry in California, Arizona, Nevada, New Mexico, El Paso, TX and Hawaii.

Zamil Air Conditioners designs, manufactures, tests, markets and services a comprehensive range of air conditioning products, from compact room air conditioners and mini splits to large scale central air conditioners, chillers and air handling units for highly specialized commercial and industrial applications.

Zimmer's Heating & Cooling business has expanded to include residential, retail, and commercial heating and cooling.

Zoro makes it quick and easy for all industries, professions and trades to get the tools and equipment they need. Zoro's extensive range of over 310,000 products includes everything from power tools and chemicals to personal protective equipment, from all the leading brands.