The key component of a SureFlow system is a custom designed fan coil with an integrated low watt circulator. The circulator delivers the design water flow through the coil and back to a primary loop. This allows the individual fan coils to be hydraulically isolated from one another and be decouple from the distribution primary loop. A benefit of this arrangement is the ability to satisfy the comfort requirements of a cooling-only system with one pipe instead of two and for a cooling and heating system with two pipes instead of four. Since the primary pump is no longer responsible for overcoming the valve and coil losses, and is only responsible for moving the water in the primary loop, the horsepower demand is reduced significantly resulting in energy savings.