Refers to the width of the current door or door where the curtain heater is located.
Refers to the height of the current door or door where the curtain heater is located.
Refers to the earth's gravity at the place where the curtain heater is located.
A coefficient that is between 0.6 and 0.9
Wind direction coefficient
A coefficient between 0.5 and 0.6 in the wind is perpendicular to the opening and between 0.25 and 0.36 in diagonal wind direction.
The temperature outdoors or the cold side of the curtain heater.
The temperature indoors or the hot side of the curtain heater.
Air density outside
The density of the cold air.
Air density inside
The density of the warm air.
Refers to the pressure difference between outside and inside. A curtain heater rarely manages to handle a pressure difference exceeding 5 Pa.
Refers to the rush of wind that any wind blows towards the opening.
Air flow due to temperature
The air flow needed to offset the temperature difference on each side of the curtain.
Air flow due to pressure
The air flow needed to offset the pressure difference on each side of the curtain.
Air flow due to wind
The airflow needed to offset the wind load against the curtain.
Total air flow
The total airflow on the curtain.