Some people are surprised to find that radiant floor heat in concrete is a really effective option. Maybe it is because everyone associates concrete floor with cold floors. Well, pretty much the same physics that means the floors stay cold means that when they are heated up, they stay warm.
Concrete flooring is sometimes called a heat battery, after the way it stores the heat up and releases it slowly and evenly across the floor - in other words it is perfect for a radiant heat floor.
All that is needed to realize this radiant heat flooring in concrete is to lay tubes into the concrete. These are then filled with hot water (or air, or other fluids can work) when the heating is needed.
A radiant floor heat layout tends to save money and fuel for a number of reasons. If it is in concrete the heat battery effect adds to this and the boiler can probably run slower and more efficiently.
For the true environmentally conscious consumer there are even hydronic radiant floor heating systems that using solar water heating. By removing the need for any radiant floor heat boilers (or at least minimizing it) they can manage virtually without fuel. These are certainly worth a look!