Application and working conditions play essential role in selecting of a heating element. Dimensions, power and surface load depend on various factors. In connection with this, in order to solve Your problem in optimum way, it is necessary to determine the following working parameters:

• Application
• heated medium
• required working temperature
• dimension limits
• rated voltages
• type of current leads / terminals
• way of temperature control (if applicable)

Depending on the type of heaters:

• fit (e. g. H7 applies to the working heaters)
• kinds of thread,
• casing material (steel, glass, porcelain, ceramics)

Permissible surface load of the heating element W/cm², depending on the working environment:

Mathematical equations for calculations.