[Cob] cob/earth oven also heating hot tub intake?

[Amanda Peck]

Something on the order of a Guzzler (Bosworth Company).  But I haven't even 
checked to see if their diaphrams and plastic bodies will take 150 or so 
degrees (F) water.  They might (bodies are delrin, so they probably will), 
and I expect that all I need to do is call them to find out.  (They are 
wonderful pumps by the way, even if I didn't learn until this summer that up 
to a point, the slower you pump the more water it moves)

http://www.thebosworthco.com/pumps_2.htm#material

Kuznetsov may be the guy who brought the masonry stove into the 20th (at 
least) century.  And I'd guess his ideas can be incorporated into your 
plans.  (the site does exist in English:  
http://www.stove.ru/index.php?lng=1  )

Right now a lot of us are fixated on the heated flue bench type of rocket 
stove.  The rocket stove is simpler.  It will also wear (burn) out sooner.  
It may also be easier to clean (this point is definitely worth thinking 
about).

...................

Karl wrote (snipped):

amanda, what kind of pump are you looking for?

www.stove.ru has some interesting solutions regarding hydronic coils in 
masonry heaters similar enough to cob to nick his ideas i think?

k-)