Xpelair was formed in 1955 as a manufacturer of unitary ventilation products. They are renowned providers of high quality quiet fans for window, wall and roof mounting. 2-speed reversing fans for exhaust or air intake.

Celebrating over 50 years of business, Yorkland Controls has roots in distributing and warehousing heating control products, such as Flame Safeguard and Burner and Boiler Management Systems. Over the past several years, they have expanded into Building Automation, Security and Lighting Integration, and Smart Building Platforms.

ZONEFIRST is the first company that successfully developed and marketed HVAC Zoning Systems back in the 1950's and is today a renowned manufacturer of HVAC zone dampers and zoning systems. They provide zone control systems, automatic dampers, registers and diffusers for fresh air intake, economizers and ventilation control.