Honeywell Wifi thermostat - $80 from Lowes.

If my furnace didn't have a rat's nest of wires in it, the install would have taken 10min from opening the box to signing into the app on my phone. At $80, thing should probably pay for itself on the first tank of oil, not to mention the savings on electric in the summer time.
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Thinking of cracked-out and/or tweaking whores getting their throats and asses brutalized for the next hit makes me hard. --Rear Admiral