Fantastic home - and I love the heating system!!! From what I've read, your only other source for heat is the electric infloor heating in the bathrooms, is this correct? Do you have a back-up heat source in the house? From some of your other posts, I gather you live in a fairly isolated area outside Toronto. What is your plan when/if you leave the house for extended periods during the winter? I assume you have a friendly neighbour who could light a fire in your house every few days if you spend a week or 2 in sunny Mexico during the winter? Actually, I'm in Sudbury, and a week or 2 near Toronto in that beautiful house would be like a holiday for me... and I know how to light a fire... I might be onto something