Cabinet Insulation. It’s good to make sure that your hot tub has excellent insulation to keep energy costs down. Here are three types of good insulation:
Full Foam insulation: 1/2 pound-density urethane foam that fully insulates the space between the cabinet and the shell.
FiberCor™ Insulation: 2-pound-density 4x deeper than most foam used in hot tubs.
Layered insulation: Select models offer multiple layers of varying density foam to minimize gaps for maximum efficiency.