Velux hot water system

Posted by Jerry Klinken on May 20, 2008, 04:08:59 AM

Velux hot water system
I'm seriously thinking about going with the Velux hot water system that has just recently been introduced into the US. I've read that these systems have been used in Europe for years. Aesthetically, they are perfect for the front of a house because they look just like skylights, and the SRCC rating is very good. Anyone have any experience with the Velux system?  http://www.veluxusa.com/products/solarWater/
 

Posted by Tom Mayrand on May 20, 2008, 09:55:07 AM

Re: Velux hot water system (Reply #1)
Jerry, most SHW panels are basically the same. Copper on copper or copper on aluminum in an insulated aluminum box. Check out the selection here. Try to buy local to keep our economy going. The rest of the system is just plumbing. Looks like you are thinking of installing on a roof. Last resort in my opinion. Keep it simple and keep it cheap for minimal maintenence and faster payback......Glad to see you reconsidered buying evacuated tubes. As you said more money, hard to replace old models and can't be repaired easily.
 

Posted by Jerry Klinken on May 29, 2008, 11:25:48 AM

Re: Velux hot water system (Reply #2)
I just found out that Velux does not recommend their system for heating a spa.  I want to install a solar hot water system that will do both, but I'm having trouble finding a solution.  Has anyone ever installed a solar hot water system that heats both domestic hot water and a spa?  From what I've read so far, I will need a 120 gallon storage tank with an auxilary heat exchanger for the spa loop, another heat exchanger in the PVC piping of the spa, and a circulator pump.  Any advice?  Thanks.
 

Posted by Tom Mayrand on June 02, 2008, 10:04:04 AM

Re: Velux hot water system (Reply #3)
Jerry, the only way I recommend using solar for heating a hot tub is to draw the water from the drain of the tub and return it back into the tub using a hose. This way here you do not mess with the manufacturers plumbing that could void warranties. You can pump the water directly from the drain into SHW panels or into a heat exchanger as you mentioned. If you want to incorporate it with solar for domestic hot water,you will need a double heat exchanger tank.
 

Posted by Jerry Klinken on June 02, 2008, 10:15:06 AM

Re: Velux hot water system (Reply #4)
Tom, thanks for the response.  I was thinking about using the double heat exchanger method.  There is a good diagram at http://www.thermomax.com/tw_pool.htm that shows how it's done. Now, I just have to decide which type of panel to go with - evacuated for performance or flat for aesthetics (front-of-house)
thanks again
 
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