Greenheck’s new rooftop ventilation unit, Model RV/RVE, conditions and controls any mixture of outdoor and return air. Designed for rooftop installations, the unit is easily configurable, making it ideal for HVAC systems in institutional applications including schools and offices, according to the company. The pre-engineered system features two-inch double-wall construction, coupled with direct-drive plenum fans and heating options of indirect gas furnace, hot water or electric. It also offers cooling options of packaged DX, chilled water or split DX and an optional energy wheel. The vent can perform up to 9,500 cfm, providing much flexibility, according to the company.