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This tool calculates the minimum water vapour needed to move room air from its initial state to a target temperature and relative humidity. Product, racks, walls, door openings, leakage and condensation remain visible as additional site loads.
Leave an unknown optional field at 0; the result will remain clearly marked as a lower bound. The default target of 30 °C and 80% RH is a calculation example, not a process-recipe recommendation.
Preliminary result
Mathematical preliminary candidate
ST-1 · 12 kg/h · 10 kW
Entered load is within ST-1 nominal capacity. Unentered product, surface and leakage loads still require final review.
Product/rack/surface load is 0. This is the physical lower bound for air only; actual room demand may be higher.
Line length was not converted into an invented loss. Verify material, diameter, pressure-temperature rating, slope, insulation and condensate drainage.
Theoretical lower times for the air-only load at nominal output
The kg/h result applies only to the target time and loads you entered. The model is a capacity comparison, not a guarantee of uniform humidity, recipe performance or product outcome. Commission the empty and loaded room with measurements.
Dough recipe and temperature, rack mass, panel and door leakage, cold-surface condensation, air circulation, sensor position, control hysteresis and steam-line losses cannot honestly be reduced to one coefficient without measurements.
In a verified Stilsan field application, ST-1 was used in a room with about 25 m² floor area and 2.5 m height. One installation is not a universal sizing rule.
Relative humidity is not directly a mass. Temperature, RH and altitude-dependent pressure are first converted to humidity ratio W (kg water/kg dry air).
We have real field experience with ST-1 in an approximately 25 m², 2.5 m-high bakery proofing room. It is not a universal guarantee without target temperature/RH, climate, product load, doors, insulation and line data.
A warm, humid start can look satisfactory quickly; a cold, dry start can take longer. A 2–10 minute field observation is not a guaranteed target-RH time.
The verified application used low-level distribution to support the natural rise of warm humid air. Outlet layout must still consider circulation, safety and condensate.
A suitable controller can call for steam while a separate heater or climate unit manages temperature. Electrical and control design must be verified for the project.
Send the room plan, target temperature/RH, product and rack load, door use, location/altitude and line data so we can check ST-1, ST-2 or a custom build.
