Is it a boiler not a furnace? Does the oil boiler have a separate zone for the domestic hot water?
It sounds like the new one may just be for storage?
Typically, for 2 water heaters, this applies:
Is it a boiler not a furnace? Does the oil boiler have a separate zone for the domestic hot water?
It sounds like the new one may just be for storage?
Typically, for 2 water heaters, this applies: