How this is calculated
Inspect the versioned inputs.
| Constant | Value | Scope & source |
|---|---|---|
| seatLength | 0.6 m/person | Geometric planning estimate; subtract unusable corners, door and heater zones. harvia-benches ↗ Verified 2026-11-08 |
| benchStep | 0.35 m | Manufacturer ergonomic suggestion; adapt for access needs. harvia-benches ↗ Verified 2026-11-08 |
Input defaults that are not sourced measurements are illustrative planning assumptions. Exact unit definitions, the 52-week convention and algorithm details are in the shared methodology.
Worked example
An example you can inspect.
A 2.4 × 2.2 × 2.2 m room has 5.28 m² floor area and 11.616 m³ volume. A 2.4 m straight bench has four geometric 0.6 m places before conflicts.
Measure the finished room, then place equipment.
Start with a sketch of the proposed finished interior. Measure clear width and length between the surfaces that will actually face the room, rather than between framing members. Record ceiling height from the finished floor. If lining, insulation or a raised floor is still being designed, keep those allowances in the project notes and enter the resulting clear dimensions. The rectangular model cannot represent a sloping ceiling, curved barrel wall, alcove or irregular footprint. Break those spaces into a separate measured drawing for the designer rather than stretching this rectangle to make the area look right.
Understand what the bench count includes.
The plan lays out straight, L-shaped or U-shaped upper benches using the entered depth. Shared corner areas are removed from the available run before estimating places. A nominal place is a length allocation from the cited bench guidance, while the lying calculation uses your required clear lying length. Neither count accounts for every person's body size, access needs, posture or ability to use a particular corner. A geometric count can therefore remain positive when a door, heater or circulation conflict makes the arrangement impractical. Resolve the warnings before treating the drawing as a project brief.
Review the clearance profile as a separate layer.
The selected heater supplies a bounded example of a footprint and clearance envelope from its cited manual. Its offset is measured from the left and back walls to the heater body. Changing that selection changes the reference envelope; it does not certify heater capacity, a protective guard, wall construction or a permit. Check the exact product, voltage variant, current manual and all surrounding materials with the installer. A clearance that appears geometrically available does not establish that the floor, wiring, ventilation and manufacturer installation conditions have been satisfied.
Use the export as a question sheet.
Before exporting, compare the diagram with the room itself. Identify the door opening direction, glass panel dimensions, bench depth and heater position on both drawings. Rotate the optional spatial sketch to understand relationships, then use the numerical dimensions to verify them. The PDF records the entered assumptions and computed results as a planning draft. Send a professional your measured drawing and the exact manufacturer documents along with that draft. A change to any finished dimension or equipment selection should trigger a fresh conflict check and a new export; an earlier PDF does not update automatically.
Use the numbers to check the sketch.
The floor area is width multiplied by length. Volume adds the ceiling dimension, while bench runs are reported separately. Keeping those quantities distinct helps prevent a visually spacious plan from concealing insufficient clear dimensions or a heater mismatch. The diagram is a communication aid; the recorded finished measurements are the reference for the next professional review.
Questions, considered
Questions about this tool
How should I interpret the sauna room designer result?
A sketch is not a construction drawing. Door width, aisle comfort, access, guards, structure, combustible surfaces and current equipment instructions need professional verification. Measure a room, sketch benches and inspect a model-specific heater envelope. Export a planning sheet for your installer.
Which assumptions matter in the sauna room designer?
Floor area = width × length; volume = area × ceiling height. Bench segments share corners once. Seating uses 0.6 m per place before heater/door conflicts; lying length is your entered requirement. Drag handles snap to 1 cm or 1 inch. The heater envelope uses only the selected CORE example manual.
Primary sources
Follow the source.
- Harvia — What to consider when choosing sauna benches ↗
Questions on bench depth, width, roof separation, opposing benches and step height
Manufacturer ergonomic planning guidance, not an occupancy, accessibility or structural code.
Checked 2026-11-08 - HUUM CORE US installation and operation manual, v9 ↗
Printed pp.4–6: sizing, Tables1–3 and installation; pp.9–11: room and ventilation
CORE9/11 rows are consistent with P/V. CORE6 is excluded: its 240V table pairs6.5kW with25A, which does not match P/V; the208V row also conflicts. Preserve this discrepancy rather than silently correct a manufacturer's table.
Checked 2026-11-08