well, the concrete planks are available in different widths and lengths check their website (www.molin.com), they also have holes in them for the entire length which the hot air could be pushed through, the hole idea is to heat the floor because when working on the vehicles i spend most of my time on the floor.Once the concrete gets warm , i would imagine it would be easier to keep it that way.what i would like to know is has anybody tried working with the concrete planking and use it as a heated floor? It just seems that it is readymade for this application , i just wouldnt know where to start , i dont think it would be difficult , just need some input on how to get it done . thanks for your input.