Here's my first post after much reading on this very helpful site... I just solved one of my fossil fuel crisis' with the purchase of a sweet 1980 Chevy Chevette. 36k original miles, one owner, no winter driving ever, 4 on the floor, marketed at 43 MPG when new...I'm up to 30 so far with some tune-up work pending. This solves the problem with my vehicle fuel consumption...now I need to solve the problem with my heating system! I've answered a lot of questions already from other posts but would like to confirm a few things and ask some more questions. Thanks in advance for your help and patience as I try and figure all this out! If you need help with your Chevette, just let me know! I would like to install an Add-On Wood Boiler to my existing Oil-Fired, FHW System. The existing unit is in the basement and exhausts into 1 of 2 flus in my tile lined, brick chimney. The other flu supports a nice 1980 Garrison wood stove located in our first floor living room. I have located a slightly used Thermo-Control 500, Boiler Model for a price I can afford but don't think I can use it without additional expense for a new chimney or giving up the woodstove in the living room which we don't really want to do. Here are my questions. Is there any way to use one of the existing flus for the boiler with the other appliance? Is my chimney type even adequate to use with the wood boiler? (assuming it's (chimney) in good shape, of course) If I need a new chimney to gain a flu, is there a type I could somehow run out of my basement and up the side of the house? If so, about how much would that cost? Is it clearly advantageous to have a water storage system or is that just a nice to have? It seems like without the water storage, the wood fuel energy would be wasted unless the baseboard loop was calling for heat...I think this is the purpose of water storage...keep heating the water even if the baseboard loop isn't circulatimg...is this right? OK...that's enough to get em going. - Check out the Vette! Hope someone will want to help out!