High Density Polyurethane (HDP) Insulated Tank

The Sunbank water tank is a pressurized tank designed specifically for cold weather and to keep heat in and cold out. Its design, craftsmanship, and important accessories all contribute to the Sunbank’s high performance and long life span.

The Sunbank water tank is insulated with 55mm of high density polyurethane insulation. It loses as much heat on a freezing night as your fiberglass insulated gas or electric water heater loses in your basement each night. That’s because high density polyurethane is a much more effective insulator than standard fiberglass insulation.

The Sunbank tank is made up of a high-quality stainless steel inner tank that is argon arc welded for maximum pressure withstanding capability. Set around this tank is 55mm of high density polyurethane insulation. And around the insulation is a steel shell that protects the insulation from UV damage and keeps the whole tank isolated from the elements. Thanks to this design and the polyurethane insulation, the tank is able to maintain a high temperature difference between the water in the tank and the outside air temperature.

The tank is pressurized to withstand up to 6bar of pressure and is tested up to 12bar. Because of this, the Sunbank works with municipal water pressure and does not rely on gravity or the use of pumps. This allows the customer to have high water pressure and a constantly full tank without using any extra electricity.

Tank Accessories

The Sunbank also comes with a couple of important accessories that ensure a long life.

Magnesium Anode

All Sunbanks come with a magenesium anode already installed. According to Randy Schuyler and Larry and Suzanne Weingarten of Water Heater Rescue, “The single most important factor in whether a water heater lives or dies is the condition of its sacrificial anode. For more than 60 years, it has been used as a key part of the rust protection of a tank, although few people know it’s there.”

Not changing the sacrificial anode is the reason that most water heaters fail. Some in as few as 5 years. Checking this component will ensure that your Sunbank lasts for decades.

For more information, check out Water Heater Rescue.

P/T Valve

All Sunbanks also come pre-equiped with a Temperature and Pressure Valve. This protects the inner tank by releasing water and heat if the temperature and therefore the pressure rises too high inside of the tank.

Optional Accessories

The Sunbank can be configured in one of two ways. As a pre-heater to your existing water heating system, or as a stand alone unit. If you prefer it to be your only water heater, then it is recommended that you install the electric heating element and Sunbank controller to supplement in times of high water usage or especially little sun. It is also possible that you might want to install the controller without the electrical heater. This allows you to keep track of the temperature in your tank.

Sunbank Controller

The Sunbank Controller measures the temperature inside the Sunbank and can be used in conjunction with the auxiliary heater. It can be set to whatever temperature range so that it will only activate the heater when the tank temperature dips below a defined temperature.

Electric Heating Element

The Sunbank can be installed with a 1.5kw auxiliary electrical heater unit.