![]() ![]() This type of system can be designed to use solar energy initially or it can be converted to solar at any time. Additionally, our components are backed by exceptionally strong warranties. Major components are all made of stainless steel or polyethylene plastic and should last a lifetime. Add a high-efficiency Polaris water heater (no boiler is needed) and the cost totals $7,500, an unbeatable price for a high-quality system.īesides keeping initial costs low, a simpler system translates into greater reliability. Underfloor materials, pumps and controls will cost you approximately $4,300. Our Open Direct System is extremely simple and simplicity costs less. The summertime cooling feature is free and actually lowers the costs of heating domestic hot water (see diagram). 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 Open Direct System uses a single domestic water heater for space heating and domestic hot water, eliminating the need for a boiler. 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. It is simple in design, efficient in operation, has modest initial costs and can make use of environmentally friendly solar technology. We believe this system is the best alternative. Other benefits of the “Open Direct” System Significant amounts of the pollutants will dissolve in the water and they go harmlessly down the drain instead of polluting the air. IF YOU CONDENSE THE STEAM IN THE EXHAUST DOWN TO WATER, YOU CAN PICK UP ANOTHER 10% IN EFFICIENCY.Open Direct System Environmental Benefits. The tank enables a huge heat exchanger for the flue.Cold water pre heat provides limited free cooling by the detail where cold replacement water passes through the tubes in the floor before it goes to the tank.Be aware that these benefits are only available with quality water heaters and may not be realized with cheap models. They can operate at low temperatures and they enable condensation of the flue gasses. Domestic water heaters are potentially more efficient than a boiler.The “Open Direct System” is compatible with solar.Lower first cost presents the opportunity to buy better, more efficient unit.One set eliminated and the other reduced because of efficient utilization. Dual use designs have less than ½ standby losses of two independent methods.The “Open Direct System” uses radiant heating which is fundamentally more energy efficient.THE OPEN DIRECT SYSTEM BENEFITS Open Direct System Energy Efficiency Benefits. ![]()
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