The Stanza 8.5 kW showers are the most suitable retro-fit replacement models:
Stanza 8.5 white*
The following showers can also be fitted although some alterations to the pipeworks and wiring may be required:
8.5 se - with a gloss white finish
8.5 cse - with a satin chrome finish
8.5 gse - with a stylish graphite finish