Here's another round of technology that I might employ with my upcoming AC replacement project -- installation of carbon dioxide sensors in each room to determine the number of people in each room and control the vents accordingly. Sounds like a fantastic improvement, eh? Energy efficiency, wa-hey!
Until you discover the cost per sensor is $219, and the sensors, manufactured in Germany, last on average 60 months. Wiring the vents will cost $1175 and each vent, now electrically controlled, will have to be replaced at a cost of $58 each. Of course, the electronic vent controller module will be $417, and the new AC adapter to power the controller will chew up 75 kWh over the life of the installation.
How much cool air could you allow to vent into space for what the technology costs to better contain it? Quite a bit, methinks.
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