Each Arctic Spa comes with our Perimeter HeatLock® Insulation System, designed to minimize heat loss and to maximize energy efficiency. This form of insulation has proven itself over and over in the harsh climates of Northern Canada.
We apply high-density urethane foam to the floor, cabinet walls and the spa rim underside, creating an insulated interior air space. Within that protected space, we install the plumbing and electrical equipment. Incidental heat from the equipment is directed inward through the shell instead of outward, thereby decreasing heating costs by capturing and transferring this ambient heat to the spa water.
This captured heat acts with the Perimeter HeatLock System® to provide a secure protection against freezing in sub-zero temperatures. If power to your spa is interrupted, heat from the spa water slowly transfers to the dead air space, protecting the plumbing and equipment from freeze-up. Even at -40oC, equipment would be protected from freezing.
The Perimeter HeatLock System® allows easy access for servicing and upgrading your spa, or for adding extra jets. It also acts as a sound barrier, so you can enjoy your Arctic Spa without being disturbed by mechanical noise from the pumps and motor.
Advantages 
