If you have a Greenhouse that depends on electricity for heat, do you have a backup in case of electricity failure? If you heat with hot water that uses a circulator, you may want to consider this design which I use with an outdoor wood burner that demands no electricity except for the hot water Circulator.
Circulator - 65 watts
The 110vac. Circulator is powered
through the 110vac. Relay.
Questions or comments;
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