The 354545-28 Venturi Nozzle is a heating and cooling accessory designed specifically for VAILLANT products. This pipe fitting is essential for maintaining optimal circulation of heat or cooling in a system, ensuring efficient performance and comfort in any heating or cooling system. Whether used for home improvement projects or in professional settings, this VAILLANT Venturi Nozzle is a reliable and high-quality component for enhancing the functionality of heating and cooling systems.