The heating capacities of convectors, defrosters, and under-seat heater units vary between 1 KW and 20 KW. Options can include PWM control for precise temperature regulation and fans to provide forced air circulation, enhancing efficiency. Defrosters are available with cooling capacities ranging from 1 KW to 10 KW, with the option of having brushless radial blower fans inside ensuring effective temperature management in varying climates. All models can be customized.