Venco heat recovery units (vhr) are designed for saving energy and also improving indoor air quality. Vhr units provide the facilities of air-conditioning applications (residential, commercial and industrial areas) by using the plate type heat exchangers that recover the heat. The heat is transferred from warm air to cold air by the exchangers with high conductivity, efficiency and performance. The unit could be equipped with the accessories; duct type electrical heater, hot water coil, silencer, high efficiency filter, by-pass kit, carbon dioxide or air quality sensor. Cartoon box and pallet