Canada Mortgage and Housing Corp. goes "door-to-door;" Limited study finds radiant heat homeowners aren't setting thermostats lower; Drake says study doesn't take "comfort level" into account.

A Canadian radiant heat study claims that homeowners with radiant floors do not set their thermostats any lower than homeowners with other types of heat, according to the Canada Mortgage and Housing Corp.

But not so fast, says Lawrence Drake, executive vice president of the Radiant Panel Association. "The study is completely unscientific and very limited," Drake says. "It's a valid issue, but not a valid study, and the matter is a lot more complicated than the study would have you believe."