## Transmission

### Transmission

Input
Designable outdoor temperature DUT= °C
Room temperature Tr= °C
Ground temperature Tm= °C
Inlet temperature Ti= °C
Specific heat capacity cp= kJ/(kg,˚C)
Density ρ= kg/m3

Building part Area Areakorr Areaber Δt U-value Leakage Power
m2 m2 m2 °C W/m2*°C l/s*m2 W
Ventilation l/s
Sum

### Designable outdoor temperature

The lowest outdoor air temperature used in the calculations, ie the lowest outdoor temperature that the indoor temperature should be maintained.

### Room temperature

The temperature to be kept inside the room in question.

### Ground temperature

The lowest temperature in the ground to be used to calculate the transmission loss to the ground.

### Inlet temperature

Refers to the temperature of the air that is blown into the room through the ventilation.

### Specific heat capacity

Specific heat capacity or cp is a measure of a material's ability to store thermal energy. If the unit for the specific heating capacity is J/(kg*K).

### Density

The density of the air that enters the room in question. Density or volume mass is a SI unit and is a measure of the density of a specific substance, ie mass per unit volume. A synonym for density that can sometimes occur is specific weight.

### Building part

 Exterior wall A wall that limits the room to the outdoor air. Basement wall A wall that confines the room to the ground. Window A window that limits the room to the outdoor air. Door A door / door that limits the space to the outdoor air. Ceiling A building part that limits the space to the outdoor air. Floor (0-1) A floor that limits the space to the ground and is between 0 and 1m from the facade. Floor (1-6) A floor that limits the space to the ground and is between 1 and 6m from the facade. Floor (>6) A floor that limits the space to the ground and is more than 6m from the facade.

### Area

Refers to the area of the building part to be calculated.

### Areakorr

An area that is removed from the area specified under "Area" this to facilitate the measurement of the area such as reducing the wall area with the area for windows and / or doors.

### Areaber

Is the area on which the calculations are made.

### Δt

The difference in temperature between the different sides of the building part in question.

### U-value

A value that shows how much heat goes through the wall, the higher the value the worse the insulation part insulates.

### Leakage

A measure of how dense the current building part is.

### Power

The power needed to compensate for the transmission losses.

### Ventilation

The amount of air that enters the room through the ventilation.