Duct Sizing
500 L/s at 0.8 Pa/m → approximately 356 mm round duct.
Open Duct SizingFree ACMV design calculators for Singapore
Calculate duct sizing, cooling load, psychrometrics, chilled-water pipe sizing and kitchen exhaust without an account.
All outputs are drafts for review, not stamped designs or submission approvals.
Cooling Load
Assumed 40 m² office, five people → 4.65 kW excluding fresh air.
Open Cooling LoadPsychrometrics
24°C, 55% RH at 101.325 kPa → 50.22 kJ/kg dry-air enthalpy.
Open PsychrometricsChilled Water
100 kW, 5°C ΔT, 1.5 m/s → 4.777 L/s and 63.68 mm internal diameter.
Open Chilled WaterKitchen Exhaust
Assumed 2 × 1 m island hood → 6,350.4 m³/h at the example settings.
Open Kitchen ExhaustHVAC Unit Converter
500 L/s → 1,800 m³/h.
Open HVAC Unit ConverterEquipment Schedule
Two assumed units at 4.65 kW each → 9.30 kW scheduled capacity.
Open Equipment ScheduleMethod Statement
Assumed 500 L/s test airflow → 1,800 m³/h for the draft test reference.
Open Method StatementSample office cooling-load PDF
Download the assumed 40 m² office example after submitting your email. The PDF includes inputs, results and limitations; it is not delivered by email.
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