Air that keeps people safe.
Air-change rates, gas dilution and extraction to keep plant rooms and confined spaces safe. Built for plant and safety engineers.
Forced extraction
Gas-dilution air-change design
The figures shown are an indicative worked example. Every result Tenselo produces shows the inputs it used and the method behind it, so the work can be checked rather than taken on trust.
Why it matters on the job
Air changes to the code
Ventilation rate set to the hazard and the standard, not a round number.
Gas diluted safely
Dilution airflow sized so a leak stays below exposure limits.
Fans that deliver
Extract duty and intake placement worked so the room actually clears.
9 Ventilation & Safety calculators
Every calculator in this category, by its reference code. Running them needs a Tenselo subscription — subscriptions open soon.
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HVC-001 Hydronic Heating Design Calculator
Heat load, underfloor circuits / radiators / fan-coils, pump flow & head, heat-pump / boiler size, buffer tank and running cost (AU, location-driven)
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HVC-002 Reverse Cycle Air Conditioner Sizing
Split / ducted / shed / container / commercial cooling + heating load from location design temps, insulation, glazing & orientation -> recommended kW + running cost
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SAF-001 Battery Room Hydrogen Ventilation
Ventilation airflow & natural vent opening to keep H2 below 4% (IEC 62485-2 / EN 50272-2)
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SAF-002 Confined Space / Wet-Well Purge
Pre-entry purge time and continuous air changes for a tank / wet well from the blower airflow (AS 2865)
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SAF-003 Diesel Engine-Room Ventilation
Combustion air + radiated-heat + radiator airflow for a diesel pump/genset room (screening - confirm with the engine data)
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SAF-004 Gas / Chlorine Room Ventilation
Extraction fan airflow for a gas store/dosing room from volume x air changes (AS 2927 / plant-room practice)
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SAF-005 Pump / Plant-Room Ventilation
Extraction airflow to remove motor/engine heat and hold a room temperature rise, plus minimum air changes
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SAF-006 Safety Shower / Eyewash (AS 4775)
Required flow, 15-minute water volume and supply pipe size for emergency showers & eyewashes (AS 4775 / ANSI Z358.1)
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SAF-007 Switchboard / Enclosure Cooling
Multi-component heat load + location ambient (hot shed / sun) -> natural vent, fan (m3/h) or AC (kW) (Rittal / NHP / Phoenix, IEC 60890)
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