There are several nice features that make carpet radiant heat a smart choice for many homes. One of the first and most important ones is that, in winter, a warm floor under foot is a real joy!
There are plenty of systems available that offer this warm foot sensation that underfloor heating owners rave about. There is hydronic radiant floor heat, which must rate as one of the first quality heating methods for a home - it dates back to the Romanic era.
The advantages of radiant heat floors from a technical point of view are twofold - 1. the heat is radiant, which means it is not blowing warm germ-filled air about in an inefficient manner and 2. the heating profile is fairly uniform through the room, unlike air-blown heating. This usually means that the thermostat can be lowered a notch or two.
The kind of electric floor heat that you can place under carpets has a couple of further advantages. First up, it is a cinch to fit. Not far off as simple as laying a rug. It is also safe - they run on low voltages that will not do any harm if damaged.
Unlike the hot water underfloor heating, this kind of under carpet system rarely replaces all the heating in a house. But it can supplement other systems for a more comfortable home life in winter.