the heated floor works like this,pack gravel lay down foil bubble wrap and ,then your re-bar,next special tubing wrapped 10-12 inches apart in a thre or four loop coming out in the location of your three stage electric boiler whitch is located aproximately four feet of the ground and is the size of (small file cabinet)all conected through two manifolds hot water and glycol 50/50 solution goes in and ciculates via a pump. since I started my "shed project" the moto was go big or bake cookies in the house.. I have satelite.water,200 amp service for the two welders,12 foot cieling,infloor drain for washing, phone and dsl for the computer. and a fantastic father-in law next door for advice!!the only thing i forgot was the [censored].. did I miss anything??