Hi, I would just like to start off by saying thank god for this forum. There really aren't too many resources online for home heating it seems. Ill start off by letting you know my situation. My plan is to replace my OLD natural gas guzzling furnaces.... Yes I said furnaces, as in 2, which both have a combined age of 74 yrs(37yrs each) of service. I am currently writing this post at work so I dont have access to the specs of the furnaces, but I believe the model names were Aircon or something close to that. One heats the upstairs, and one the downstairs, and while they both still function fine aside from being QUITE loud, they are definately not efficient, as last winter I recall one month the heat bill was over 300 dollars for a 1050 sq ft house, that seems unacceptable to me(and gas prices are higher this year). About the only maintenance Ive done is replace the bearings on one, and change the filters (probably not often enough). We've only lived in this house 3 years, but I dont want to go another winter with inefficient furnaces(that sound like a train rumbling by). My first course of action is calling a company for an EnerGuide for Houses evaluation, which is how Canadians(such as myself)can qualify for a federal grant which will compensate you for being more environmentally friendly in reducing emmissions. Anyways, I feel lost as this is my first home and Ive never had to go through this process before. This house evaluation seems like a decent idea though, you get a score when you are first evaluated, 0-100 (0 being the low end, and 100 being the most efficient house) and you get an outline as to what deficiencies your home has from poor windows, to your furance and so on. Then you have 18 months to correct as many deficiencies as you want, then call the inspector back to see what you have corrected and you get rescored. The difference in the score equates to how much of a grant you get dollar wise. I just have so many questions, my first question would have been which brand of furnace do I buy, but from browsing this site it seems like you guys feel that the install is more important than the brand(aside from Goodman), right now im considering Carrier, and Lennox? Anyways, with our high gas prices, and COLD winters in Canada im thinking the highest efficiency furnace is the way to go, but being that its an older home, does that matter in the choice? and the high efficiency furnaces need plastic piping or something? would that be a problem? How does one know if a company is going to be good at installations, what kind of questions do I ask the prospective installation companies?? Another thing I was wondering, being that my house is currently using 2 furnaces, would 2 small high efficiency furnaces be the way to go?, or just replace 2 with one?? OK this post is getting excessive, so I will stop for now, sorry I realize that was way too long of a post but it was my first so bare with me. Thank you in advance.