pind koormus / elektriline küttekeha element on võimsus kaasas - per ruut sentimeeter pindala sisse küte toru.
For example,the diamter is 12mm,the power is 500W,to caculate the surface load,please refer the below:
Esimene ,caculate the surface area:3.14*1.2*20=75.36cm2
Niisiis the surface load is 3.14*1.2*20=75.36cm2.
