Yeah, that relay is in all the time, it only de-energizes when the breaker is open,
or when a problem occurs (like over-pressure).
That manifold heater is adding a little to the e-bill when the weather is nice.
I try to keep and eye on the forecast, and keep the breaker open, on days like we've been having this week.
It won't be long and cold weather will be upon us again..
I think using an SSR indoors, will be the most reliable way to go..
And I do have a few SSRs in stock. Might as well use what I've got.