3 ms·
Most furnaces, perhaps all, in the Canada and the US use an 18V control circuit. Close the circuit, the furnace is on. In the UK, the control circuit is on th
by hackbinary 12y ago
Most furnaces, perhaps all, in the Canada and the US use an 18V control circuit. Close the circuit, the furnace is on.
In the UK, the control circuit is on the mains; close the circuit, the furnace is on.