AirSys is pleased to announce that the first of what we are sure will be many indirect fired make-up air units has been sold. The unit will provide heat and ventilation air to a pair of modular process buildings. Along with this superior make-up air unit, the ventilation air will be distributed through the modular buildings using clamp together duct provided by K&B Ducting. Clamp together duct is a cost effective alternative to traditional spiral duct work. It can be installed quickly and easily and modified as needed with little effort.