Yes, I’m using the Keen Home smart vents and they work great!
The value prop is the following:
(1) My smartapps (see the link below) can not only open/close the vents automatically, they are in fact controlling the opening level (just like a dimmer switch) based on the temp differential between the actual temp and the desired setpoint.
(2) A warmer room (exposed to the sun) would then get more cooling air flow in the Summer and the opposite in the Winter, so that you are more confortable throughout your home and save money at the same time.
(3) The smartapps re-evaluate the vent settings every 5 minutes…
I don’t know about you, but I don’t usually adjust my vents for the optimum air flow during the day (as it’s too much work to walk all over the house to do it),and not every 5 minutes for sure!
(4) The smartapps that I’ve developed create zones inside your home so that you can heat/cool only some selected rooms/zones. For instance, you may not want to cool/heat your whole house at nights, just the upstairs bedrooms. My smartapp would then close (partially) the downstairs vents, and, by doing so, direct more air flow to the upstairs bedrooms automatically for you.
Such multi-zoned systems exist on the market, but they require professional installation and are costly (around $10-15K)…
Smart Vents combined with my smartappswill cost you much less for some similar capabilities (but not exact functionalities).
I hope that you understand the value prop better.
See this thread for more details on my smartapps:
Bye for now.
P.S. According to Keen Home, the batteries will need to be changed every 2 years or so…