First |Previous Picture |Next Picture |Last

To:Todd Harrison <toddharrison@cox.net>
From: Christopher Corzine <corzinec@gmail.com>

8/26/2007

Todd,

Thanks so much for your response and the extra info. As I said I am heating
a hot tub and I'm guessing it's roughly 475 gallons. Last night I built a coil
consisting of roughly 18 feet (over the grill) of copper tubing. When I fired
up the system today (I have split off the pump just as you did) I am only getting
about a 6 degree boost in temperature from input to output. (84f - 90f)
Did I mention I am in Florida and the spa gets about 8 hours of direct sunlight
a day (that is why I am starting out with 84f)

I am planning on buying a floating cover for the hot tub today as I currently
have no cover at all.

Do you think I can improve the efficiency / gain of these coils? Do I need more
length of copper? Do you think I could conceivably get the hot tub up to 98-100f

Any help you are willing to give is appreciated. This sure is a fun project.

-Chris Corzine
Tallahassee, Florida
Christopher Corzine <corzinec@gmail.com>



To:Todd Harrison <toddharrison@cox.net>
From: Christopher Corzine <corzinec@gmail.com>

8/27/2007

Todd,

Thanks for all the info. These sorts of projects are addictive.
I actually had some good success with my unit yesterday. I added another ten feet
of copper coil bringing me up to 28 feet and I slowed my water flow slightly and
was gaining about 23 degrees input to output. I was able to heat the hot tub to
101f last night in roughly 6 hours.

My fiance's skepticism turned into excitement when she stepped into the spa and
said "wow, it is like a real hot tub"

Thanks again,

-Chris Corzine
Tallahassee, Florida
Christopher Corzine <corzinec@gmail.com>