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Posted by kantirawal on December 15, 2007, 6:21 pm
We are in the process of going totally solar.
WE need to select an electric furnace and airconditioning system for
our house.
Any recommendations?

Posted by Morris Dovey on December 15, 2007, 6:24 pm
kantirawal@gmail.com wrote:
| We are in the process of going totally solar.
| WE need to select an electric furnace and airconditioning system for
| our house.
| Any recommendations?

Eh? Totally solar? Electric furnace? Electric air-conditioning?

Add up all your wattages and then start looking at battery and PV

Morris Dovey
DeSoto Solar
DeSoto, Iowa USA

Posted by Jeff on December 15, 2007, 7:56 pm
 kantirawal@gmail.com wrote:

Ask over in alt.solar.photovoltaic .

Solar heating is about 50% efficient or so in using the suns energy.
Converting solar to electrity is only about 15%. We would tell you that
is an expensive inefficient way to heat your house. Solar thermal panels
cost a fraction of PV as well as being many times more efficient.

   There is solar air conditioning, but it is not widespread or well
developed. If you are putting PV panels to power your home then you
could use conventional electric ACs.

   If you do go PV to electric heat, then look for a very good heat pump
to make up for the conversion loss. Probably a ground source heat pump/ac.


Posted by southsidedelite on December 15, 2007, 9:51 pm
direct use of the sun through the windows is simple, highly effective,
if you need more heat consider storing heat from summer in a large
storage tank or swimming pool.
this way you can use a few solar water collectors to provide hot water
for the tap in a heat exchanger loop in a second hotwatertank and then
circulate the hotwater into a coil though a large body of water to
take up the remaining heat once your second watertank is ip to temp.
As fir cooking, consider a slow cooker in a sunroom, simply put a
black pot in an insulated box with some reflectors to catch more sun,
and let it simmer all day, saves tons of energy!
as for boiling water,  i guess you could go with a solar concentrator,
but propane seems a simpler solution, or burning a bit of wood when

Posted by Trygve Lillefosse on December 17, 2007, 5:38 am
 On Sat, 15 Dec 2007 10:21:08 -0800 (PST), kantirawal@gmail.com wrote:

A heatpump.

They come in different varieties.

Collecting heat/cold from and delivering heat/cold to:

The ones that collects heat/cold from air is the cheapest ones, but
makes a litle sound outside. The air/air ones are the best when you
want to be able to both cool and heat depending on season, although
you still need a solution for hot water.

The ones that collect heat/cold from water(geothermal) are more
expensive, but work at higher efficiency. They are probarbly best for
single use(heating or cooling) Theese need a drilling hole, long tubes
burried in the ground or long tubes layd down in water.

SEE YA !!!
Trygve Lillefosse
AKA - Malawi, The Fisher King

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