Adding hot water to my wood furnace

[thesmackdown]

I have a Monarch Add-A-Furnace that has an air chamber outside the firebox with a blower.

Would it be possible or make sense to add an air to water heat exchanger to aid in DHW? I also have a good sized cistern right next to it that I want to, some day, use for heat storage when I upgrade to a gasifying boiler.

Thanks!

Evan