We live in the northeast and have an oil fired furnace for (radiant
floor) heat and domestic hot water.
When the seasons get warm I usually turn off the furnace for periods
of time when we don't need to use hot water, so we can save energy.
This is a problem for the family members that wake up early and like
to take a shower first thing in the morning.
I was considering the use of an X-10 module on the furnace switch, but
the switch is not an AC voltage.
How can I solve this problem?