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two residential hot water heaters instead of one commercial
I am on the board of a 9 unit condo building with about 30 residents on three stories (and three tiers connected). Our 100 gallon A.O. Smith is leaking after 9 years and needs to be replaced. A building maintenance guy told me years ago that it is possible for a building my size to buy two or three residential heaters for less money instead of another commercial heater. Has anyone done this? If so, how much repiping is involved?
Advantages as I understand it:
- if one heater goes, then the other one is still working while the bad one is fixed
- much cheaper
- the warranty looks to be better
If we were to install a residential, what would anyone recommend?