Ice baths in Surabaya: cold plunge tubs for homes and clinics

Two degrees of water, and where they actually show up

Surabaya and Jakarta look similar on a weather app: both hot, both humid, both at sea level. The difference that matters is the tap. Jakarta delivers 28-30 degrees, Surabaya 29-31, and the afternoon air here reaches 35 rather than 34. That pushes the holding load from 516 to 529 watts and drags the real chiller output down to 2.55 kW, the lowest figure on this site. For a 400-litre tub it does not change the machine — that is 2 HP in both cities, because our line runs 1 and 2 HP and nothing in between — but it does change the two numbers you live with: Rp 220,000 a month instead of Rp 214,000, and 5.8 hours for the first pull-down instead of 5.4.

Where those two degrees do buy a whole machine is underneath 400 litres. A 250-litre tub in Jakarta holds on 1 HP; the same tub here needs 2 HP, so the small format costs Rp 7 million more in Surabaya than it does three hundred kilometres west. Above that, the honest answer is that the chiller line-up treats the two cities identically, and any saving has to come out of the shell rather than the machine. If the budget will not stretch, we would rather sell you 300 litres of terrazzo on the same 2 HP that genuinely reaches 5 degrees than 400 litres of something thinner that never does.

Which volume makes sense on a Surabaya plot

Notice that 250 litres already takes a 2 HP here, where the same volume runs on 1 HP in Jakarta. That is the two extra degrees of incoming water again, and it is the only place in the table where your address, rather than your tub size, picks the machine. Compare it directly with Jakarta and with Bandung, which is three hours from Jakarta and runs the same 400-litre tub on Rp 177,000 a month. Any other volume can be checked on the chiller calculator.

Corporate buyers, not households

Surabaya orders skew commercial more than anywhere else in Java: physiotherapy practices near the hospitals in the east, football and athletics clubs, gyms in the western estates, and factory clinics out towards Sidoarjo and Gresik. That changes the specification rather than the tub. Commercial jobs get automatic sanitation instead of a cartridge you rinse, a calibrated probe with printable logs for audits, and often a standby chiller that can take over — the detail is under commercial ice baths.

For gyms the real design number is not litres but turnover. Ten bathers a day at three minutes each is a different water problem from two bathers for ten minutes, and it is the body heat and the refill water, not the air, that the chiller then chases. We size for the busiest hour of your busiest day, and we ask for that hour honestly at survey.

Estates in the west, older plots in the south, coastal water to the east

West Surabaya — Citraland, Pakuwon Indah, Graha Famili — is where tubs most often go in beside an existing swimming pool, sharing a plant room and a filter cupboard. That is genuinely efficient, but the two systems must not share water: pool-strength chlorine at 3 degrees stings, because the skin is constricted and contact time is long. In the south, older plots of six by fifteen metres suit a slim 250-litre body far better than a two-seat format.

Twelve hours of road, and the day that decides everything

Shells for East Java leave Cikarang on the Trans-Java toll road and spend 12 to 14 hours travelling. Twenty working days is the figure from deposit to handover. The last day is the one that counts: we fill, run the tub from 30 down to 5 degrees in about 5.8 hours and hand over only when a probe thermometer in the water agrees with the promise. The final 20 per cent of the invoice falls due after that reading, not before — which is exactly why we are strict at the sizing stage. All payment stages are on the pricing page.

Questions from Surabaya