Also confused...what is needing to be monitored? If the heater is sufficiently protected from freezing temps by being indoors and having a flue baffle installed, I can't think of anything else to monitor. As far as getting a unit, tho, I can only give you 2 thumbs up because that's all was born with. The only drawback to tankless is going to be sizing it. In cold climates, it will need to be pretty big or else the hot water will only be a trickle in the winter. But the energy saved by not heating unused water all workday & overnight is huge. Well worth it, best thing I did to my home.