[blucille]

in floor heating, around here is mostly just floor warming. I do like it a lot, but in the cooler parts of the house (house built in the 1770's remodeled and insulated very recently)--parts especially with high ceilings and with exposure to the elements on 3 sides, the floor warming (fed by hot water under stone floors, in a mud base, heavily insulated below, built on a crawl-space) the floor warming couldn't keep the room comfortable, so we went to our fall-back and added forced air heating to that area only. If the house is existing, I expect the cost to retrofit floor heating will be excessive.

all that being said, the floor warming is wonderful, your body feels warm, even when the room/ambient air temp is fairly low, and it does a decent job of not wasting the heat by it rising up to high ceilings, etc....

in the rest of the house we have radiators, and in recently remodeled bathrooms, we have electric floor warming, the perfect compromise, good heat in the winter from the rads and warm toes from the floor heating.....of course we get hot summers, so we ducted for AC everywhere, which is how/why we were able to add the zone of forced air heat to compensate for the cool room that only had floor warming.