Project planning and calculation

To choose the correct product, the following should be considered: 

Energy demand

The first step is to determine the area load, W/m². For comfort heating applications this can normally be done either by heat loss calculation or by using empirical values, which is a quick and reliable method. Heat loss calculations can be a complex matter, and should, if possible, be carried out by an architect, planner or  building contractor. 

The area energy demand is normally regarded as the power requirement for the gross area. In rooms with obstacles such as fixed furniture, toilet, bathtub etc, it may be necessary to increase the net area power to compensate for the unheated areas (heating cables shall never be laid under fixed objects).

The selection of cable type shall be based on application type and construction details, such as ground or floor type, power requirement etc. 

Centre spacing (c-c)

his parameter applies specifically to cable elements and not mats, where the centre spacing is fixed. If the cable is installed with the correct centre spacing, it will cover the entire area. The centre spacing is easily found by dividing net area by cable length.

c-c (cm) = net area (m²) x 100 / cable length (m)