The Vaillant pressure-sensing venturi is located around the fan section. The fan is the mechanism that injects fresh air into the combustion chamber, allowing the gas to be burnt correctly.
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Technical Specifications
TypeVenturiSupplier Part Number20135123Brand NameVaillant
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Vaillant ecoTEC Plus VUW / ecoTEC VU Pressure Sensing Venturi Part 0020135123