First class service were a joy to deal with replaced our water heater and outside faucet. Pilot lights are supplied to enable the operator to see the status at a glance. Electric boiler for c.h basic version power: 4-24 kw. The gastec combination boiler courses are available on a regular basis. I have tried this product for the first time i like the idea of it being made from all natural ingredients and no toxic chemicals included in its content having less than.