what kind of cheap thermostat could I use to control a passive solar water heater for my hot tub?
February 1st, 2010 | 
Author:
I want to build a batch heater or a passive coil system on a painted black corrugated metal backing. But I want to be able to stop the flow when the water gets to a set temp. It would be great to be able to just put in a car radiator thermostat but it would allow the water to get too hot.
Posted in Solar Energy | 
Tags: CHEAP, control, could, Heater, kind, Passive, Solar, thermostat, water
Hello flagnsnarf:
You may need to install a low-voltage transformer with a thermostat and a solenoid valve. An automotive thermostat has too high a temperature setting.