Custom cold plunge · 17 provinces · since 2021
We cast the shells ourselves in Tabanan, Bali and assemble and bench-test every chiller in Cikarang, West Java. One tub, one heat-load calculation, one crew that stays until the water genuinely reads 3 degrees.
Why imported tubs disappoint here
A plunge tub designed in Europe is sized against 18-degree air. In Surabaya the afternoon air is 33 degrees and the mains water is 30. The load is three times larger, and it runs 365 days a year.
An open 400-litre tub in a Jakarta garden absorbs roughly 710 watts continuously, and the largest single contributor is not hot air — it is condensation. Jakarta's dew point sits around 25 degrees, so a 5-degree water surface pulls moisture out of the air all day long, and every gram that condenses dumps its latent heat straight into the tub. That is about 170 watts per square metre of surface, permanently, and it appears nowhere in a European manufacturer's sizing chart.
The second problem is subtler: a chiller loses capacity exactly when the water gets cold. A unit rated at 4.2 kW is measured against 15-degree water. Against 5-degree water, with its condenser standing in 34-degree air, real output drops to about 1.95 kW — less than half. Every PK figure on this site already accounts for that, so the 1.5 PK we quote behaves like 1.5 PK in your garden rather than in a test chamber.
Those figures are for a 400-litre tub with 40 mm insulation and the lid on outside bathing hours. Without the lid the load climbs from 516 to 710 watts and the bill from roughly Rp 214,000 to Rp 283,000 a month, which is why the lid is included in the price of every tub we build rather than sold as an extra.
What we build
The materials differ; the cooling does not. Every tub leaves the workshop fully insulated, with a concealed overflow and a chiller that has already run 24 hours in water.
Terrazzo body cast in a single pour in Tabanan, ground in three passes, 40 mm insulation, twenty years of service.
View →Forty-millimetre teak staves under 316 stainless banding, acrylic liner inside, 40 mm of insulation between the two.
View →Argon-welded, acid-passivated 316 stainless body for clinics, gyms and any site within two kilometres of the sea.
View →In-ground tub cast on site with 150 mm walls and four coats of microcement, for permanent terraces and gardens.
View →Onyx laminated to glass with 24-volt LED behind it: a cold plunge that becomes the light source of the room.
View →Insulated folding tub, usable in twelve minutes, packs down to 14 kg: buy it to test the habit, not to keep forever.
View →Materials
A 400-litre tub can cost Rp 5 million or Rp 150 million. The difference is the shell, not the volume of water.
| Material | Price range | Service life | Best for |
|---|---|---|---|
| Insulated portable | Rp 4.5 juta - Rp 7.9 juta | 2-4 years | Trying it out, rentals, athletes who move |
| Acrylic | Rp 12 juta - Rp 18 juta | 6-8 years | Apartment balconies, tight spaces |
| Teak | Rp 18 juta - Rp 28 juta | 10-15 years | Timber houses, villas, sauna decks |
| Terrazzo | Rp 22 juta - Rp 38 juta | 20+ years | Our most-chosen shell, indoors and out |
| 316 stainless | Rp 28 juta - Rp 45 juta | 20+ years | Clinics, gyms, coastal sites |
| Microcement concrete | Rp 35 juta - Rp 65 juta | 20+ years | In-ground tubs beside a pool |
| Backlit onyx | Rp 85 juta - Rp 150 juta | 20+ years | Hotel spas, rooms built around the tub |
Our terrazzo is cast in Tabanan from Tulungagung marble aggregate and white cement, then wet-ground in three passes until it reads like glass. It is a single monolithic body rather than slabs bonded to a frame, so there is no joint in a corner waiting to leak.
In stainless we use 316 only, never 304. The difference is about Rp 3.5 million on a tub, but within two kilometres of the sea — Canggu, Sanur, Batam, Manado — 304 starts pitting inside fourteen months. We have replaced other people's 304 tubs in Sidoarjo and Sanur for exactly that reason.
Chillers
We sell two lines: imported units we re-test and re-warrant, and the Arctic inverter line we assemble in Cikarang for full tropical duty.
| Size | Nominal cooling | Max volume | Power draw | Imported | Arctic inverter |
|---|---|---|---|---|---|
| 0.5 PK | 1.4 kW | 110 L | 480 W | Rp 14 juta | Rp 26 juta |
| 0.75 PK | 2.1 kW | 180 L | 700 W | Rp 16.5 juta | Rp 29 juta |
| 1.0 PK | 2.8 kW | 260 L | 950 W | Rp 19 juta | Rp 33 juta |
| 1.5 PK | 4.2 kW | 410 L | 1400 W | Rp 26 juta | Rp 39 juta |
| 2.0 PK | 5.6 kW | 570 L | 1850 W | Rp 34 juta | Rp 45 juta |
| 3.0 PK | 8.4 kW | 1100 L | 2700 W | Rp 48 juta | Rp 52 juta |
The maximum volume column is not a brochure number. It is the largest tub that unit can still hold at 5 degrees once the low-temperature capacity loss is taken into account, in hot lowland Indonesia with the lid fitted — 33-degree air, 29-degree mains water. In Bandung that figure rises about 20 per cent; in Berastagi about 45 per cent.
The real difference between the two lines is behaviour rather than power. An imported chiller runs on-off: the compressor starts at full load, stops, starts again. Water drifts about 1.5 degrees and the compressor starts a dozen or more times a day, and every start is the hardest moment in its life. The Arctic line uses an inverter compressor that holds a low speed continuously — ±0.3 degrees, 25-30 per cent less electricity, and under 48 dB at one metre.
If you do not yet know what size you need, our chiller calculator works it out from tub volume, city and whether the lid is used. It runs the same model our own survey sheet uses.
Where we work
Shells are made in Tabanan and Cikarang, then shipped whole or modular depending on distance. Java and Bali get our own trucks; everywhere else travels by container in crates we build ourselves.
How it runs
For installations outside Java and Bali the fitting crew flies with the unit. One visit has to finish the job — sending a technician to Sorong twice costs more than the tub.
Warranty
We make no health claims. There is interesting research on recovery and mood, but we are builders rather than clinicians — if you have a heart condition, uncontrolled hypertension, epilepsy or you are pregnant, ask a doctor before you ask us. What we do understand is how to hold 400 litres of water at 3 degrees, continuously, in a country whose heat never takes a day off.
Questions
Shells start at Rp 4.5 million for an insulated portable and Rp 22 million for cast terrazzo; chillers run Rp 14-48 million depending on size. The most-ordered home package — a 400-litre terrazzo tub, a 1.5 PK chiller and the insulated lid — lands between Rp 52 and 64 million installed in Java and Bali. Full breakdown on the pricing page.
It depends on tub volume, the mains water temperature in your city and whether you use a lid. For 400 litres with a lid: 2 PK in Surabaya, Pontianak and Palu; 1.5 PK in Jakarta, Bali, Medan and Bandung; 1 PK in Batu; 0.75 PK in Berastagi. The spread is narrower than most people expect. Our chiller calculator works it out in ten seconds.
You can, and for the first fortnight it is the cheapest way to find out whether you will actually use it daily. In Jakarta it takes 18-25 kg of ice per session, roughly Rp 45,000-70,000 a day, so within five months you have spent what a chiller costs. It genuinely makes sense in highland towns like Batu, Lembang and Berastagi, where the tap water already arrives at 17-21 degrees.
10 working days at the fastest for Bali, 14 for Java, 20-35 outside Java because of shipping schedules. Onyx and marble always take 3-4 weeks because each slab is selected by hand.
We ship to 17 provinces, from Banda Aceh to Jayapura. Java and Bali get our own trucks; everywhere else travels by container with a technician flying to meet it. Check the locations page for your city.
A 1 PK chiller draws about 950 watts, a 1.5 PK about 1,400. A 2,200 VA household supply handles 1.5 PK as long as it is not competing with a water pump and a large air conditioner. On 1,300 VA, upgrade the supply first — it costs far less than replacing a compressor killed by voltage sag.
With cartridge filtration and ozone, four to eight weeks for one or two people a day. Without filtration, three days. Commercial tubs in gyms get automatic sanitation and a monthly change.
That is the most common request of all: one deck with a dry sauna and a cold plunge side by side for contrast bathing. We build both — see sauna and ice bath packages.
Start with numbers
There is no standard package. We work out how many watts of heat push into your tub every hour, then size the chiller and the insulation against that. You get figures, not a brochure.
If you would rather talk, the WhatsApp number is answered by people who actually install these tubs, not by an office that forwards messages.
We reply with sizing, the right chiller and a full price.