I am remodeling a house that currently uses a hot water boiler heating system to also heat a hotwater tank for general use. In winter, this seems very efficient since the boiler is running often. In other seasons (7 months/year) it seems very inefficient since the entire boiler needs to fire up whenever we wash a few dishes.

Over the course of the year, would I save significantly on efficiency if I replaced the indirect tank with a traditional gas water heater?

Thanks in advance,
Mike