## Curtain heater

### Curtain heater

Input Result
Opening width B=
Opening height H=
Air density outside ρu= kg/m3
Air density inside ρi=
Pressure difference ΔP= Pa
Wind speed v=
Gravitational coefficient g= m/s2
Flow coefficient Cd=
Wind direction coefficient Cv=
Air flow due to temperature QT=
Air flow due to pressure QP=
Air flow due to wind QV=
Total air flow Qtot=

### Opening width

Refers to the width of the current door or door where the curtain heater is located.

### Opening height

Refers to the height of the current door or door where the curtain heater is located.

### Gravitational coefficient

Refers to the earth's gravity at the place where the curtain heater is located.

### Flow coefficient

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.

### Temperature outside

The temperature outdoors or the cold side of the curtain heater.

### Temperature inside

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.

### Pressure difference

Refers to the pressure difference between outside and inside. A curtain heater rarely manages to handle a pressure difference exceeding 5 Pa.

### Wind speed

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.