Why Use Solar Hot Water?
- Reduce Utility Bills – Solar Hot Water Systems reduces water-heating costs by 75-90%.
- Safe Investment– Your initial costs are pay back within 3 to 5 years and protect yourself from unpredictable utility rate increases.
- Top of the line product – Central Florida Solar uses only the highest rated collectors in the industry.
- Fully Automated – Pump and controller are automatically activated by the sun.
- Constant heating – Back-up heating element means you always have hot water even during extended cloudy periods.
- Incentives – Solar water heaters qualify for a 30 percent Renewable Energy Federal Tax Credit from the government. Also some local utility companies offer rebates.
- Go Green and harness the most powerful, clean and free energy source available, our sun. With the sun’s power source, solar water heaters produce no greenhouse gas emissions.
How it Works
All of the convenience of traditional water heaters, without the traditional costs, emissions, and hassles.
- Water in the storage tank is pumped through a series of valves to your solar collector.
- As the water rises through the solar collector, it is heated by the sun’s thermal energy.
- The heated water is then returned back to the tank, where it is stored until used.
Direct Open Loop System Details more
Direct Open Loop System
Differential Controller Operated System
The direct pumped system has one or more solar energy collectors installed on the roof and a storage tank somewhere below, usually in a garage or utility room. A pump circulates the water from the tank to the collectors and back again. This is called a direct (open loop) system because the sun’s heat is transferred directly to the potable water circulating through the collector tubing and storage tank; no anti-freeze solution or heat exchanger is involved.
This system has a differential controller that senses temperature differences between water leaving the solar collector and the coldest water in the storage tank. When the water in the collector is about 15-20° F warmer than the water in the tank, the pump is turned on by the controller. When the temperature difference drops to about 3-5° F, the pump is turned off. In this way, the water always gains heat from the collector when the pump operates.
A flush-type freeze protection valve installed near the collector provides freeze protection. Whenever temperatures approach freezing, the valve opens to let warm water for manual draining by closing the isolation valves (located above the storage tank) and opening the drain valves. Another method of freeze protection is achieved by water recirculation. When the temperature approaches freezing, the pump activates to circulate warm water through the collectors.