5 - EN1 Introduction and safetyThe unit is a balanced ventilation system with heatrecovery in order to create energy-efficient ventilationin houses. Balanced ventilation means that pollutantsfrom the kitchen, bathroom, wc(s) and possibly theutility room are extracted, while the same amount offresh air is blown into the living room and bedrooms.Gaps under or near doors ensure a good through-flowin the dwelling.Ensure that the gaps under or near doors arenever obstructed. For example by furniture,draught excluders or deep-pile carpet.A balanced ventilation system consists of:The unit (A);Duct system for the intake of outdoor air (B);Duct system for the exhaust of indoor air (C);Supply valves in the living room and bedrooms (D);Exhaust valves in the kitchen, bathroom, wc and (ifpresent) the utility room (E).Safety instructionsAlways follow the safety regulations, warnings,comments and instructions given in this document.Personal injury or damage to the unit can arise fromnon-compliance with the safety regulations, warnings,comments and instructions in this document.It is recommended to take out a maintenancecontract so that the device is checked on a regularbasis. The supplier can provide a list of registeredinstallers nearby;The unit may only be installed, connected,rendered operational and maintained by anappropriately approved installer, unless otherwiseindicated in this document;Store this document for the entire working life ofthe unit;Instructions with regard to maintenance of thefilters must be carefully observed;When carrying out any work on the unit, makesure the power is disconnected and cannot beinadvertently reconnected;If the unit is disconnected from the power supply,mechanical ventilation of the dwelling will cease.This can lead to a buildup of moisture and result inproblems with mould;The unit cannot be opened without using tools.ABCEEEDDD