97 12 Unmissable installation tips The correct operation of your DUCO ventilation system is entirely dependent on the choice and build quality of the supply and exhaust ducts! Has the duct system been optimised? Ask professional advice from your duct supplier. It saves you time, ensures quality and provides energetic advantage for the end user! Ensure there is sufficient distance between ODA and EHA cf. EN 13779. 1 Use thermally insulated ducts for ODA and EHA. 2 3 Assure an airtight connection by using tape, clamping strips or tie-wrap. Do not use screws. Place a cap on any unused connection opening. 4 Use at least 1 m of flexible or rigid silencer. Rigid = low emission from housing Flex = low noise from duct For wall mounting: wall with minimum mass density of 200 kg/m². Plaster blocks or metal struts are not adequate! Use a mounting plinth if the wall is not sufficient. 5 Duct diameter: 160 mm to 250 m³/h/180 mm from 250 m³/h and over or equivalent subject to calculation (e.g. with cast-in ducting) Make sure that the total counter pressure in the ducts is as low as possible (preferably ≤ 150Pa) and that the airspeed in every duct does not exceed 3 m/s. 6 Select a roof passthrough with low resistance. 7 Keep resistance down to a minimum. Avoid as much as possible the use of curves. Avoid sharp angles. Avoid bumps and dirt in the ducts. 8 Use brackets with a rubber inlay to reduce transmission of vibration. 9 Hang the unit level. 10 Allow sufficient space for the condensate drain. 11 12 Use silencers between rooms to prevent voices from carrying. 64 mm 00004376 EHA SUP1 SUP2 ETA ODA 80 mm
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