I absolutely love my I/R ventless wall units!
If the hydro goes out, they keep on keep'n on.
I don't know what low gas would hurt a printed circuit board?
But I have seen those boards be a problem before.
Relays are a lot more trustworthy than fancy gizmo boards!
Having a ventless wall unit set a little below your forced air - would allow you a lot more security.
They are only about $200 or so at Menards. Might be $250 since The Flu, but ...
I would want one - especially for not being there.
Does the hydro ever go out there?
.