Air conditioning giant Carrier Corp. has made an undisclosed minority equity investment in Ecobee, the smart thermostat maker. The investment comes after the two had collaborated to create a new Wi-Fi-enabled thermostat for Carrier dubbed Cor. The Cor is aimed at consumer homes, where Ecobee has been selling connected thermostats since 2007. Nest currently dominates the market for smart thermostats, but I personally have been a fan of Ecobee’s products because that are more open and have been pushing the envelope on innovation. It’s latest thermostat includes sensors that give the thermostat presence and room-by-room temperature information.