The calculator is used to calculate the ventilation capacity in an attic or loft for the minimum, normal and extreme thermal conditions of the environment depending on the area and height of the room and the roof pitch. The fan removes warm air from the room and should be mounted at the highest possible point for the best efficiency.

Thanks to this calculator, you can easily calculate the cost and the amount of paint needed to paint any room.

Use this calculator to calculate the molecular weight of gas.