| 摘要 |
A system and method of using a set-back or programmable thermostat for heating or cooling systems to also controlling a fast-recovery water heater such as a power-vented fossil fuel powered water heater such that the water heater is disabled during a set-back mode of the thermostat. The system sends a control signal to a relay module adjacent to the water heater, into which the water heater electrical power cord can be plugged into. The interlock mechanism of the water heater prevents operation of the water heater when power to the water heater is interrupted.
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