I don't have whole-house, just the one setup (in the main room--I'm in an open floor plan), and it is warm enough for that. These things are so crazy-easy and fast for the professionals to install, you won't believe it. I wouldn't see how anyone couldn't help you out. 

 Around here its more about keeping cool enough during summer, not too worried about warm enough since we have a good woodstove.  Thanks for the input.😊 

 Same. Heat + me = disaster