Air-technical end element for creating the air-technical pipe system of apartments / offices ventilated with a heat recovery ventilation device. It can be fitted to the end of 2 ventilation ducts with a diameter of 75/63 mm directed towards the rooms to be ventilated. After creating the pipe connection, a disc valve (with 125 mm connection) suitable for blowing in or exhausting, or an Aerauliqa design end element with an adjustable cross-section can be attached to the end element.