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What to replace an aging hydronic boiler for heating and hot water to improve efficiency and lower gas costs?

bayareahome | Posted in General Questions on

I have a gas powered LAARS mini combo II that provides hot water and heating throughout our home.  It is very expensive on gas in the winter.  Is there a more economical type of unit that can replace this system for my heating and hot water needs?  Tankless would be a bonus if these can be applied to our system easily.

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