yellow designed the gas heating value system ecoCOMPACT in cooperation with the Vaillant design department. It saves space and energy and is highly convenient. The innovative "Magic Flap" furthermore enables the universal usability of the console.

Without any setting up of joints this flap can be opened at both ends or alternatively be taken off with only one grip. Another specificity of the product-line is the efficient and uniform build created for all three different sizes.