I have to give my opinion on radiant floors after having them myself for over a year now.
I seriously think that radiant floors are the future of whole home heating, right now the price of radiant floors are truly much up there and not all the people can afford them, then but I think that in time, radiant floors are going to go the same way that central heating plus A/C system did about 25 years ago.
Which is that the prices will come down to where the average working class man can afford to get radiant floors for their home. It will be the way that all the people heat their homes in the future. I think the central air conditioning system will still exist for cooling until someone comes up with another more energy efficient concept, but the central heating plus A/C system units will no longer be that! They will be just stand alone central air conditioning system units! Your heating will be taken care of from radiant floors throughout the home. Ever since I have had radiant floors, not only have my energy costs been super low in the chilly winter time months of the year, but also the way the radiant floors heat my new home is like no other form of heating I have ever experienced. Everything is so nice and moderate with no chilly spots in the home whatsoever. Also I have to say that the radiant floors give off a better form of heating than central heating and A/C system unit’s gas furnaces do.