For what it costs I see no talk of timers/solar/cost comparisons etc
I installed a hot water heater timer in our house 3 months ago
It is on from 7-9:30am then 5:30 to 10pm.
That means it is only actually running (actual power availability that is)
about 7.5 hours
The insulation is good enough that it is not drawing power than for maybe
half of that
At 13C/KW in Savannah GA that ain't much (heater is 4500W 50 Gallon)
Ergo = $4.38/day which is at most $131.63 per month
In reality it is running about 1/2 of that, so it is costing about $65/month
to heat water !!!!!!!!!!!!!!!!!!!!
FYI That is almost $800 per year (minimum) to have hot water
Now does anyone see the value to having a Solar Hot Water heater?!?!?!?!?!?!
--
David B Turner
Island Computers US Corp
2700 Gregory St, Suite 180
Savannah GA 31404
Tel: 912 447 6622 X201
Cell: 912 447 6622 X252
Fax: 912 201 0402
Email:
Web: http://www.islandco.com
=====================================
All orders are subject to the following terms and conditions
of sale. These should be read before ordering.
http://www.islandco.com/warranty.html
"If Progress is good for the people, what is Congress?"
wrote in message
...
wrote:
Lets say it saves =A320 a year heating dhw only.
Would that be 20 UK pounds per year? Sounds like a very poor water
heater.
... American families pay about $20 per month for hot water.
Welcome to uk.diy Nick. Maybe you can give them a pointer or 2 on how
to make a constructive DHW system that pays its way...
It isn't worth doing much to save 20 pounds per year, but it might make
more sense to collect both hot water and space heat from a polytunnel,
which might have a linear parabolic reflective north wall over a 2'x6'x8'
shoebox tank with an EPDM or polyethylene film liner and a $60 1"x300'
piece
of pressurized polyethylene pipe for a heat exchanger and a horizontal
draindown EPDM cover with a small pump to move water up 2" over the cover
when the sun is shining, and a greywater heat exchanger, eg 2 55 gallon
drums with PE pipe in series.
Gary Reysa and I have been working on this sort of DIY stuff. See
http://BuildItSolar.com.
Nick