Day 6: Aftermarket HVAC Booster

My house isn't that big, but one segment of it remains materially cooler than the others.  Yes, I've adjusted the dampers, but it still doesn't work well.  The solution: an integrated system of register fan boosters and temperature sensors tied into your smart thermostat.  Key features:

• Compatible with a range of "smart thermostats".  Key output is sending a signal to turn the HVAC fan on.
• Register boosters turn on when the temperature in the room is materially different from the thermostat setting (directionally correct depending on heating or cooling).  The register boosters are aware of the main HVAC system's fan running and are only running when the main fan is running.
• Alternately, allow user to install fans in the duct to provide a similar boost (but have it tied to thermometers in a room or a couple of rooms).

So this is sort of a gadget that appends to the end of your existing HVAC control system.  Not sure how easy this would be to integrate into Nest, but there are definitely some Z-Wave controllers for which this could be easily implemented.