WebJul 20, 2010 · Safety Standards. GAS TECHNOLOGY: Boiler NOx Emissions. In some areas, operators are required to meet what are called “Ultra-Low NOx” (ULN) requirements, typically less than 10-12 ppm. It is widely believed that the ULN requirements will be broadened to more areas. In recent years, boiler and burner designers have focused on achieving ULN ... WebVAILLANT Scaldabagno a Gas Vaillant per esterno outsideMAG 17 litri low NOx cod. MAG 178/1-5 RT Metano. Scaldabagno a Gas Vaillant per esterno outsideMAG 17 litri low NOx cod. MAG 178/1-5 RT Metano. (842) Feedaty. 519,00 €. + Sped. 20,00 €. Tot. 539,00 €.
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