Depending how old your house is you might have have an air exchanger. I don't think creating one for your furnace would work. I think it would have to be an air exchanger set up otherwise you would be drawing cold air in the winter to your furnace and would be extremly un efficient and expensive. Sask Energy would love you! What about adding an airstone & pump or blowing a fan across top of water even in your sump if you have one. I think this would be MUCH cheaper than getting an air exchanger although they are good to have. In the summer you could crack a window or two.
R
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The more I spend...The more I need to spend!
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