adobe machine room?

[Chuck Guzis]

On 21 Oct 2007 at 12:08, Kevin Handy wrote:

> This works because the ground below a certain depth is usually
> much cooler than the surface, which is why your grandparents
> dug a root cellar to store vegetables and preserves.

I was thinking about big-iron machine room with a heat load of 
perhaps 100K BTUs or more.  Earth tubes of any practical size just 
don't have the capacity for that.

Heat pumps using wells for a heat source or sink are not uncommon for 
large-capacity installations.

Cheers,
Chuck