Cold water on an island that never cools down

Where the efficiency comes from

Insulation in the shell and under the base, a fitted lid light enough that people actually use it, and a shaded position. Those three do most of the work that a bigger compressor would otherwise be asked to do.

Shade matters more here than almost anywhere, because the sun is close to vertical for much of the year. A pergola, a thatched pavilion or a mature badamier tree is worth more than the next size of machine.

Carved basalt, and why it suits the island

A tub cut from a single block of local basalt is dense, dark and thermally massive: it holds temperature better than any clad tub and it looks like it came out of the ground here, because it did.

It is also very heavy, which means the deck or slab is checked before we quote and the cyclone anchorage is designed around the mass rather than fighting it.

Water in a humid climate

Warm ambient plus heavy use is the hardest case for water quality. Circulation, cartridge filtration and an ozone or UV stage are mandatory on anything shared, plus a rinse point before the tub.

Salt in the air adds a second job: every metal component in the water circuit is A4 stainless or titanium, and the plant enclosure is sealed and filtered.

In short

• Chiller needed year round — there is no cool season to lean on
• Insulation, a usable lid and shade do the work a bigger compressor would
• Carved local basalt: dense, dark and thermally massive
• A4 stainless or titanium in the water circuit, sealed plant enclosure