The Polar Pad is a portable heating device that warms the propane in a tank or cylinder (vessel) to increase the gas vapour pressure.

As ambient temperatures drop the vapour pressure in the vessel decreases making it harder to pull vapour out of the vessel just when you need it the most.

The Polar Pad transfers heat into the liquid propane and provides energy to kick it over to the gas phase.

The Polar Pad should be mounted so that the heat transfers into the liquid phase of the propane. For cylinders this is near the bottom. For tanks this is at the 4 or 8 o’clock position. DO NOT mount the Polar Pad at the bottom of the tank. Over time the bottom of the tank gets covered with muck that acts like an insulator stopping heat from transferring to the liquid propane.

There is no need to insulate the vessel. Liquid propane absorbs heat easily and propane gas acts like an insulator. Once the liquid propane turns to gas it is much more difficult to turn back to liquid.

The thermostat senses the local (ambient) air temperature. When the temperature drops below -10C the Polar Pad will turn on, so power is used only when needed.

Each vessel will need the rated number of Polar Pads on it as if it were the only vessel feeding the system. If there are Polar Pads on only one vessel then that vessel will supply the load, and the others will remain full.

As many as are needed to meet the rated demand load.

No. The amount of heat going into the vessel is very low compared to the ambient heat in summer.

That depends. Although Polar Pads are CSA certified as portable devices the local inspector has jurisdiction over the final installation. Check with your local inspector.