Solar Hot Water

(Solar Thermal) We have over 15 years of experience designing and installing solar hot water systems for both residential and commercial. We work with architects, contractors, building owners, and homeowners to develop systems that are designed for each unique project need. We strive to make sure the client receives the system that makes the most sense.

Investing in an SHW system is a smart solar solution for most homeowners. Our systems use proven and reliable technology and offer long-term performance with low maintenance. With Federal, State, and utility incentives, these systems offer a quick payback—in some cases, only four to eight years.

Solar hot water systems produce more than three times the energy of solar electric systems and integrate perfectly with domestic hot water systems, radiant in floor heating, pools and hot tubs.

Areas of Expertise (Integrating Solar Hot Water with)

- Domestic Hot Water
- In Floor Radiant Heat
- Pools
- Hot Tubs
- Home Heating Systems

 

How Solar Hot Water Works:

Pressurized Glycol Systems:

Most of the systems we install are pressurized glycol systems.  In this active, closed-loop system, incoming potable water is routed to the solar storage tank, but never into the collectors. A water and antifreeze mixture circulates from the collectors through a coil of pipe in the solar tank, and then is pumped back through the collectors. (In most climates, a 50/50 propylene glycol and water mixture will keep collectors from freezing.) This mixture continues to circulate as long as the collectors are hotter than the storage tank.  A controller monitors the temperature of the collectors and tank and turns the pumps on automatically.  Typical solar hot water temperatures are between 120 degrees and 150 degrees Fahrenheit.

Solar Hot Water

 
Closed-Loop Drainback Systems:
The closed-loop drainback system requires the least routine service of any active system. The heat-transfer fluid is water, with sometimes a little bit of glycol mixed in. When the system is at rest (not pumping), the solar collector is empty and the water is stored in a reservoir tank, usually located just above the solar storage tank. When the pump turns on, distilled water is circulated from the reservoir back through the collector and heat exchanger, passing heat to the potable water in the solar tank. When the pump shuts off again, the water drains back into the reservoir. The collector must therefore always be higher than the storage tank, and there must be sufficient continuous slope in the piping to ensure against freezing.
Drainback systems are effective and reliable. They work great, even on the hottest and coldest days of the year, and can operate twenty years without needing service. The downside is that larger pumps usually need to be used, since the drainback pump has to lift the water to the height of the solar collectors. Solar Hot Water

 

 

 

 

 

 

 

 

 

 

 

 

 

Solar Hot Water is generated by pumping a water/glycol mixture from the storage tank up through your solar collectors.
 

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