Compatible with: Black Beauty Unigas 473, Colourway 540, Homestyle 540, British Gas BGC2 540, British Gas BGC2 540, British Gas BGC2 540, Ultimate 541, Masquerade 541, Masquerade 541, Excelsior 541, Excelsior 541, Decadent 541, Decadent 541, Chic 541, Dream 541, Dream 541, Dream 541, Black Beauty Unigas 469, Flamenco Unigas III, Highlight Unigas 494 To be fitted by a suitably qualified/ competent person