Actually what I was getting at was how big the study group was going to be, and how many researchers involved. My understanding of a "controlled" trial tells me that there are volunteers to have your device installed, meaning you'll need a lot of them, and other volunteers, who use the system they are already equipped with, but probably a hodgepodge of thermostats, none of which record data, and most of which will not be accurate. The volunteers in all groups will need some sort of equipment fitted in their homes. Somebody has to go set every one up, and make sure it works... and troubleshoot each one that breaks down...
Anyway, you have a small team working on this with you, many hands make light work.
Still, I don't often hear of the initiation of such a study - one usually only hears of the results when published in a journal, so it does pique my interest; the logistical questions and so on.