The Vaillant Air/Flue Duct Extension (970mm, 100mm Diameter, 303903) is an ideal solution for extending the flue system of your Vaillant ecoTEC boiler, offering flexibility in installation by accommodating both horizontal and vertical setups. Its simple push-fit connectors ensure quick and easy installation, while its compatibility with all Vaillant high-efficiency boilers makes it a versatile choice for various setups
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