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Insulation

Barrier Insulation: Although it takes more time and material to create a spa this way, barrier insulation ( a pocket of air sandwiched by foam on the shell and on the cabinet) is a better way to insulate a spa. Polyurethane materials have a much higher thermal conductivity than air. Heat travels much more slowly through still air than it does through polyurethane foam. The trick is to "hold" the heat in a material that will not transfer that heat to air very well. We accomplish this by insulating the shell and the cabinet separately. Spas are engineered this way for efficient cold weather use to reduce heating costs.

We blow solid cell high-density foam directly on the shell and then the spa is sealed with another layer of insulation all the way around the cabinet and throughout the floor. This creates the "still air", utilizing the heat from the pumps and only allowing the heat to escape out through the top. Ninety percent of all heat loss occurs at the surface of the water. This is why it is imperative to have a quality Prestige spa cover to retain heat.