One particularly important consideration for a hot tub
is what it looks like "under the bonnet". The construction of the pipes is an essential criterion. Internal, short and effectively insulated pipes have very low heat loss. Villeroy & Boch hot tubs
come with up to 90 per cent fewer pipes than comparable products and rank among the most economical models in their class, according to the California Energy Commission. The integrated filter system
also keeps the water clean, which means it needs to be changed just three or four times a year.