RenewAire makes a gorgeous DOAS unit, their “DN” series. It utilizes the famous RenewAire enthalpic energy recovery core, plus heating and cooling options. Here are a couple of photos of model DN2RT, which was recently installed on the roof of a school in central Connecticut. This application required a DX cooling coil and gas furnace section. On a frosty morning in January, I had the opportunity to visit the job site and review the maintenance manual with the facilities staff. Everyone agreed this unit is a beauty!