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Open Direct SystemThe Open Direct System is one single system that operates in three different and distinct ways. Yet, this ingenious system is entirely automatic. It needs no separate actions or adjustments by the homeowner at all. Domestic Hot Water Mode Operation Summertime Cooling Mode Operation (optional)
Open Direct System DiagramWe believe this system is the best alternative. It is simple in design, efficient in operation, has modest initial costs and can make use of environmentally friendly solar technology. When and where local codes permit the delivery of space heating and domestic hot water through a single system, we recommend the Open Direct System. Here's why: EfficiencyThe Open Direct System uses a single domestic water heater for space heating and domestic hot water, eliminating the need for a boiler. The low operating temperatures of radiant heating allow the use of state-of-the-art "condensing" domestic water heaters which are 95 percent efficient. The summertime cooling feature is free and actually lower the costs of heating domestic hot water (see diagram). Initial costThe Open Direct System is extremely simple and simplicity costs less. Consider, for example, a 2,500 sq. ft. house with two zones. The cost for underfloor materials, pumps and controls is approximately $4,300. Add to this the price of high-efficiency Polaris water heater (no boiler is needed) and the cost totals $7,500, an unbeatable price for a high-quality system. SimplicityBesides keeping initial costs low, this translates into greater reliability. LongevityMajor components are all made of stainless steel or polyethylene plastic and should last a lifetime. And our components are backed by exceptionally strong warranties. Environmentally Friendly This type of system can be designed to use solar energy initially
or can be converted to solar at any time. Click
here to see how the open direct system can make use of solar energy. The Open Direct System is our customer's preferred system.
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