Posted by nicksanspam on December 9, 2007, 11:53 pm
And the fin-tubes "work fine"? :-)
Posted by J. Clarke on December 10, 2007, 12:31 am
Yes. If you need 3 feet of fin tube at 200F then you need about 9-1/2
feet at 120F.
to email, dial "usenet" and validate
(was jclarke at eye bee em dot net)
Posted by Anthony Matonak on December 9, 2007, 10:36 pm
Why use water? Why not put an air heating panel up on the roof and
circulate air? Air heaters are less expensive, easier to make and
don't freeze or leak. Well, they might leak but even if they do you
won't have a problem with air spilling out everywhere. I'm told
you can even build your own solar air heating panels fairly cheaply
out of materials that can be found in almost any home improvement
Any heat you get (when you want heat) will reduce the need to burn
propane (if you burn propane for heat). Solar panels don't work at
night or cloudy days though so you'll still need something else
unless you have a way to store the heat.
Posted by Jeff on December 10, 2007, 2:51 am
Anthony Matonak wrote:
I looked into this some time ago and you'll have to consider the hassle
of ducting enough air up there and back. Water is much easier to plumb
long distances. The specific heat per volume is much higher for water.
On a side note, when I read this I thought car radiator. A little fan
power through even a small radiator yields many BTUs. Put it inside a
loose knit fabric box for appearances.
Posted by nicksanspam on December 10, 2007, 3:41 pm
Why a panel with back heat loss, and why on the roof, vs a south wall?
Warm air rises...