Do you have to buy heating elements and breakers separate? How many heater elements will fit this?

Hello, 20kw furnaces technically have two 10kw heat strips. There are two circuits, both are 60 amps. There are breakers on the furnace. You will need to either use your existing breakers from the panel or change them to the appropriate amperage in the panel. If you have any further questions, please feel free to give us a call! Thank you.