Here's an interesting Mother Earth article from 1982 or thereabouts -- back in the early mists of secondary combustion and catalysts -- about a home-brew pneumatic l draft-control thermostat:
(broken link removed) (Scroll down to "Part III", although the other stuff is interesting too.)
I found this while Googling the Condar "Stovetemp" thermostat mentioned by Craig in another thread. There really *isn't* very much new under the sun, it seems....
Eddy
(broken link removed) (Scroll down to "Part III", although the other stuff is interesting too.)
I found this while Googling the Condar "Stovetemp" thermostat mentioned by Craig in another thread. There really *isn't* very much new under the sun, it seems....
Eddy