Request a Quote ↗Yurtfan Fan Selection Centre
Enter the required airflow and pressure together with your site altitude and temperature. The system compares catalogue performance curves and ranks the most suitable Yurtfan models.
Find the Right Model
List suitable fan models on their actual performance curves, taking altitude and temperature into account.
The performance curve will appear here when you select a fan model from the table.
The red marker shows the duty point. Drag the chart left or right to explore the fan curve.
Calculation Method
Yurtfan catalogue data is defined for dry air at sea level and 20 °C. Air density decreases as altitude or temperature increases. The selector converts the required site pressure to the catalogue reference density to find the correct model.
First, atmospheric pressure corresponding to the entered altitude is calculated.
p(h) = 101325 × (1 − 2,25577×10⁻⁵ × h)⁵·²⁵⁵⁸⁸h: altitude (m) · p: atmospheric pressure (Pa)
Air density at the operating site is calculated using atmospheric pressure and temperature.
ρ = p(h) ÷ [287,05 × (T + 273,15)]T: temperature (°C) · ρ: air density (kg/m³)
The required site pressure is converted to the sea-level and 20 °C catalogue condition.
Pₖ = Pₛ × (ρ₂₀ ÷ ρₛ)ρ₂₀: 1,204 kg/m³ · ρₛ: site density