The DSOT-34 has been designed for installation into concrete slabs and is most suited to Off-Peak Storage Heating Systems. 
Maximum Cable Load: 34 W/m

The DSIG-19 is designed for in screed or floor topping installations, where the screed is 20-25mm thick.
Maximum Cable Load: 19 W/m   

The DSIG-15 is designed for in screed or floor topping installations. where the screed is at least 15mm thick. (Best suited for bathrooms)
Maximum Cable Load: 15 W/m          

The DSIG-10 is designed for in screed or floor topping systems as well as under timber floors and soil warming installations. 
Maximum Cable Load: 10 W/m          

Twin conductor heating cable for direct, off peak or background floor heating systems. Also for ice and snow melting and agricultural applications.

Silicon cables are extremely flexible and thus very well suited to installations in areas with very high or very low temperatures. 
Maximum Cable Load: 40 W/m

These are used for frost protection of pipes, heating of hot water supplies and to prevent icing of down pipes.

The DSIA cables have been designed for the ice and snow protection of roadways and walkways.

STEP ONE:
Establish the amount of heat required to heat the area (also called the heat load).

STEP TWO:
Evaluate the floor construction. Then, based on the load required, the floor construction and the maximum load that the different cable types emit, select the most suitable Deviflex™ electric heating cable system.

STEP 3:
Using the size of the area to be heated and the cable type, calculate the required cable spacing using either the Cable Length or the Area Loading:

(see the floor heating installation instructions)  

Typical Area Loadings W/m²

Maximum Load on Heating Cables W/m (20ºC)