I'll start with the question first. The backstory is below: I'm looking for a way to turn my heat on with a simple timer switch. Kind of like a microwave with the "add 30 seconds" function--I hit the button once, I get the furnace on for 30 min, hit it twice for 60 min, etc, rather than being thermostatically controlled (or preferably being able to choose which way the system is functioning). Why: I have a bit of a complicated setup (because of the stove now heating most of my living space). Basically, I have a NG boiler with radiator heating. Basically all I need it for now is one or 2 rooms for some supplemental heat. I replaced all of the valves to the radiators so that I can now actually shut them off if not being used. This means that when I turn on the heat, usually I'm only heating 1 or 2 radiators. A thermostat (even if it was in the same room, which it isn't) doesn't work well for this type of heating. If I turn the heat on for 45 minutes, that's enough time for the system to heat up and get the radiator(s) warm. The actual temperature of the room might not go up for a bit after that, but will then stay warm for hours. My wife/nanny can't seem to remember to shut the heat off. So the furnace will run for hours, just circulating hot water through one very hot radiator and wasting a ton of gas.