Good morning Cathy, I am assuming that you live in a state where EPA phase 2 testing and tagging is not required, we should all have more info about what you are attempting to accomplish, one of the first questions that I like to ask is regarding your heat load, most folks will go solely on the square footage of the building, there is a big difference in heat load of a 3000 square foot well insulated home with radiant heat and a poorly insulated 3000 square foot home with an oil or gas boiler with baseboard. What I like to use is the total amount of fuel you used over the past 3 years averaged, this gives us a really good # to go on for heat load. My wife put together a nice page of info/ websites for people in your position including questions that should be asked of the dealer, I can send you a copy if you would like, I'm not sure if posting it would be the right thing to do, maybe some of my fellow dealers would let me know how they feel about it and if they are OK then I will post it