What does 2-stage boiler mean?
This means tes has a high and a low fire. The machine senses how much heat is needed and adjusts accordingly. This can also be adjusted manually. For example, if you are using all four tex boxes it will be in high fire mode to keep up with the demand, if you use only two tex boxes the demand for heat is reduced and the boiler will fire in low to use less propane. This is adjusted manually at set up by a valve that is on the tes machine.
