I started buying smart vents to control a temp difference due to solar load on the south side of my house. I have 8 vents and 1 puck. I bought Honeywell sensors that I connect to my T10 thermostat, which interfaces with flair seamlessly. Today I have a 2275sq.ft. house which remained at 77° in every room while theoutside temp rose to 97° here in Fla.