A hotel can add a sauna, showers, changing rooms and a place to rest without starting a building project. Æqua modules are built and tested at our factory in Latvia, arrive finished and are set on a prepared base.

Æqua sauna modules seat from 4 to 30 guests. The commercial grade, made for daily guest use, complies with EN 18164:2026, the European standard for wellness facilities for public use. Production takes 12–14 weeks and delivery about 2 more; a single module is set on site in 2–3 hours. The hotel prepares the foundation, access and utility connections.

Æqua works as a design code and an engineering platform. Every module shares one style, structure and ventilation design, so modules connect to each other without redesign. With it we can build almost any wellness configuration: saunas, lounges, changing rooms, showers, toilets and suites for short stays. A hotel can start with one sauna and add modules as demand grows.

Core: 4–6 guests, 2.8 × 2.5 × 2.8 m.
Cella: 6–8 guests, 3.4 × 2.5 × 2.8 m.
Forum: 10–12 guests, 5.6 × 2.5 × 2.8 m.
Atrium: 26–30 guests, 9.4 × 2.8 × 2.8 m.
Rota RV: 6–8 guests, 3.4 × 2.5 × 3.2 m, an off-grid sauna on an EU-certified road-legal trailer.
Suite: a short-stay unit for two guests, 6.7 × 2.5 × 2.8 m.

Sizes are length × width × height.

Core, Cella and Forum come in two grades with the same design, dimensions, layout and heater. The commercial grade uses materials chosen for intensive use: thermo-ash interior, R13 slip-resistant floor tiles, triple glazing with a heat-reflective coating, AISI 316 stainless steel fixtures and mechanical ventilation controlled by a CO2 sensor. Atrium and Rota are made in commercial grade only.

The ventilation is designed with heat-transfer modelling and checked with CFD simulations. In the commercial grade, the air is renewed 6.3 times per hour, CO2 stays below 820 ppm and air movement in the bench zone is limited to 0.2 m/s. The heat stays even, without draughts.

Heater power depends on the room volume, the type of ventilation (our mechanical system or natural ventilation) and the climate where the sauna will run. Standard heaters for each model are listed in our catalogue.

Shared sauna sessions of about 90 minutes in European cities sell for around €20–30 per person; Banya No.1 in London, for example, charges from £25. A simple way to size the offer: revenue per slot = seats × price per guest. A full 90-minute slot in a Cella (8 seats at €30) brings €240. Divide your total installed cost by that figure to see how many full slots pay it back, then adjust for staff, energy, VAT and the fact that few slots are always full.

1. Brief. Tell us the number of guests, how the sauna will be used and your timeline. We help choose standard modules or start a bespoke design.
2. Permits. Rules vary by location. We provide documentation for the local authority; ask a local architect which approvals your site needs.
3. Production. 12–14 weeks, depending on the factory's workload. Payments: 35% to start production, 35% when the shell is complete, 30% before delivery. Layout, benches, lighting, glazing and heater type can be adapted within the standard models in 1–2 weeks before production starts.
4. Site preparation. In the meantime, the hotel prepares a flat, stable base, vehicle access, space for the crane or forklift within 3 m of the installation point, power during installation and utility connection points within 1 m of the module's connections. Some regions require a local specialist to make the utility connection.
5. Delivery and installation. Delivery takes about 2 weeks. A single module is set on site in 2–3 hours; it arrives assembled and tested, with no construction on site.

For larger or non-standard facilities we design a wellness building for the project, on the same design approach, ventilation technology and engineering platform. Bespoke design is a separate service; the guide price is 5–10% of the project's expected production cost.

2 years on the whole sauna and 10 years on the frame, for every model and both grades. We recommend an annual cleaning and regular wiping of the glass and LED lights.

Our own demonstration park, Aequa Belgrade, is in progress: www.aequa.space. See the models on the Æqua page, and read how delivery works in From Factory to Unfolded.