Projects · 20 persons

20-person commercial sauna — club class for large gyms & hotels

A club-class 20-person commercial sauna: 5 × 3.5 m, three bench tiers, two Harvia 10.5 kW heaters sharing the load — built for large gyms, hotels, and spas with heavy guest flow.

20-person sauna — project interior by Kontraktor Sauna Surabaya

Project specifications

Project specifications

Footprint
5 × 3,5 m
Capacity
20 orang / persons
Heater
2 × Harvia 10,5 kW
Power required
3 fase (dihitung bersama manajemen gedung) / 3-phase (sized with building management)
Materials
Thermowood asap + aspen, tiga tingkat bangku
Build time
6–8 minggu / weeks
Prices
mulai IDR 300 juta

Prices are indicative, based on real 2025–2026 projects, and depend on size, materials and site conditions. Final quote — free on WhatsApp after a site survey.

This is the largest format we build — no longer a cabin, but a sauna hall. Three bench tiers seat twenty without crowding, two 10.5 kW heaters share the load so temperature stays stable even as double glass doors open and close constantly at peak hours, and smoked thermowood is chosen because it takes years of intensive use without changing colour or shape.

Large gym and hotel superblocks around Pakuwon, airport hotels along the Sidoarjo corridor, and large staff facilities in the Gresik industrial estates are the property profiles that suit this class best. We deliver it together with building management — from three-phase load calculations, to remote monitoring for temperature and ventilation, to the technical documentation commercial buildings need for safety inspection.

Gallery

The details that make the difference

FAQ

Frequently asked questions

Why two heaters instead of one large unit?

Two 10.5 kW heaters sharing the load are more reliable than one large unit: if one needs service, the cabin can still run at reduced capacity instead of closing entirely. It also keeps temperature more even across a room this size than a single heat source could.

Does our building need special electrical work?

Yes — two 10.5 kW heaters run on 3-phase power, standard for commercial buildings. We start with an audit of your building’s electrical panel: if capacity allows, it only needs a dedicated run and protection added; if not, the addition is priced into the quote from the start.

Does this include maintenance after handover?

Our team offers a scheduled service contract after handover: checks on both heaters, re-tightening the three bench tiers, and control-panel monitoring. For the full recovery ecosystem — sauna, cold plunge, jacuzzi — see the wellness zone page.

What is the investment for a 20-person commercial sauna?

From IDR 300 million, indicative — the final figure depends heavily on room condition and chosen finishing. A detailed quote follows the site survey. The general commercial picture is on the commercial sauna page.

WhatsApp

Tell us about your sauna project

Share your room size, location and the type of sauna you want — we reply on WhatsApp with technical recommendations, a realistic cost estimate and a free site-survey slot. No pushy sales, ever.

We usually reply within 1–2 hours (08:00–20:00 WIB)