We just purchased a house with a Burnham steam boiler fitted with copper piping throughout. The boiler is connected to two thermostats and it indirectly heats the hot water (SuperStor). A few days ago, we noticed that even though the thermostats are off, the boiler keeps switching on several times an hour when no one is using hot water. We called two heating companies and both opined that there's something wrong with the wiring and piping. One company suggested that we tear out the copper pipes and replace them with steel pipes because copper pipes are incompatible with steam heat. The other company said that copper pipes are fine. Who's right?