Nortek Global HVAC, O’Fallon, Mo., has added the R7DA, a combination dedication outdoor air system (DOAS) and conventional space conditioning rooftop unit (RTU), to the Reznor® and Mammoth® branded R7 Platform product lines for optimum indoor air quality (IAQ) and space comfort in commercial applications. Nortek Reznor R7DA The low cost R7DA is the industry’s only direct expansion (DX) package DOAS/RTU offering a drop-in replacement that fits many existing RTU brand roof curbs. Its one-inch-thick… Read More