My mentor just bought a millivolt one at Home Depot $25(RightAid brand)sp?
He said it works like a charm that the only downfall, if you will,
is that it has batteries to run the digital program.
He has been growing orchids in a g/h for over 50yrs & has had one
thermostat all that time. Maybe we should be looking into
that manufacturer? *g*

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Cheers Wendy

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wrote:
Does anyone have a source for a waterproof programmable termostat for
a greenhouse that can control a 110v heater?