US Spa uses several insulating materials working together to better insulate the spa from heat loss and reduce sound and vibration.

Hyrizon 30 pound per square foot foam resin provides the first layer of insulating material on the shell.  In addition a one pound polyurethane foam is sprayed on all of the free hanging plumbing fixtures, hoses, and lines preventing heat loss and securing various items together to reduce vibration.

Hot Air Space is an engineered gap or space of air in between the foam and the foil backed Styrofoam insulation on the skirt panels. This space of air is needed to let the pumps breathe. In addition, the hot air that is exhausted from the pumps circulates around the foam and in between the Styrofoam insulation creating an additional insulator. By using what otherwise have been wasted energy, we have collected this energy and converted it into the second part of our insulating materials.

Foil-backed Styrofoam Insulation; is a ¾ inch panel of Styrofoam material with a heat reflective foil sheet that is attached to the skirt panels. The hot exhausted air from the Hot Air Space now circulates in between the foam and the foil-backed Styrofoam insulation, creating a double-pane window effect. The radiant heat of the pumps and the spa reflects off the inside facing foil and is reflected back to the spa.

 
Panels of redwood siding is not only what completes the spa and finishes the beautiful skirt paneling, but is also the final insulating factor before the spa's heat is lost into the atmosphere.