Calculators

Online tools for engineering calculations

Duct Sizing

Air velocity for round and rectangular ducts by flow rate Q, m³/h.

All moist air parameters (φ, d, h, ρ, v, Tdp, Twb) with I–d chart.

Size intake & discharge grille area for a condenser in a niche, by capacity and free-area coefficient η.

AC cooling capacity (TR, Btu/hr, kW) and required air flow by floor area, building type and load factors.

Supply air flow for an indoor swimming pool hall by air-change rate, with fresh/recirculated split.