Re: [GBlist] Re: Hybrid Slab

[RET John <retjohnd@home.com>]

on 2/26/01 8:18, Sarah Holland/David Foley at hollandfoley@acadia.net wrote:

Ron Cline........

> Winston, yes.  Bion Howard recently noted that a Kachadorian-style slab may
> be useful if it is heated by warm air (positive pressure), and the heat
> transfers back into the living space by radiation and conduction - as in a
> hydronically-heated slab.  I still think that the resources devoted to
> building the plenum, and devising a means of blowing air into it, would pay
> for all or a large part of a solar DHW system.

I also know that moving AIR is much more energy intensive than moving WATER.
Water stores MUCH more energy than air every will. I agree that money spent
on air ducts and plenums should go towards a radient foor heating system AND
a solar  hot water heating system. That way you have the best of all worlds
- an efficient, quiet  and clean heaying system, a LOW cost operating
heating system and if you installed a solar hot water system to heat the
water used in the radient floor loop then you could provide up to 100% of
your hot water via of solar energy depending on your climate and minimize
the use of fossil fuels which are costign more and more and will continue on
that path....after all they are not making anymore oil or natiral gas on a
daily basis! (they just have to go deeper and farther to find it!)

-- 
Sincerely,

John D'Angelo

Renewable Energy Technologies
877 S. Cole Dr.
Lakewood, Colorado 80228-3021
USA

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Direct email: retjohnd@home.com