Clutch The KTM 250 EXC-F employs the KTM-developed DDS clutch (damped diaphragm steel) with a wear-free steel basket and extremely heat resistant clutch plates and new, nitrated steel liners. This clever design employs a diaphragm spring instead of the usual coil springs, making for considerably easier clutch action.
The difference between active and passive solar water heating systems is that active systems have circulating pumps and controls, while passive systems do not. Although passive systems are usually not as expensive as active systems and can last longer, they are generally less eficient.
The bases of the Aqua-Hot unit is that it operates like hot water heater. The unit has a fluid that is kept at Approx 184 degrees. Upon demand from the thermostat a pump will circulate warm water through a radiator and a low speed fan will force air across the radiator and into your living area.