The point where the well feed enters the house is central and about 18 feet from the Rinnai. There is a two foot electric baseboard near it.
I got some expert advice and the bottom line is the bottom line. A UPS big enough to run the Rinnai for days would cost what a whole-house generator would cost: $3-4,000. He recommended either draining everything or getting a genset, and getting a "freeze warning" system that will alert us when the temp drops below a setpoint.
Still waiting on the plumber, he's on "Vermont Time" apparently. "Sometime next week" means he will call me Saturday morning to explain why he hasn't showed up yet.....
I got some expert advice and the bottom line is the bottom line. A UPS big enough to run the Rinnai for days would cost what a whole-house generator would cost: $3-4,000. He recommended either draining everything or getting a genset, and getting a "freeze warning" system that will alert us when the temp drops below a setpoint.
Still waiting on the plumber, he's on "Vermont Time" apparently. "Sometime next week" means he will call me Saturday morning to explain why he hasn't showed up yet.....