Hi Freewill,

My husband is in the business and could probably give you a fair ballpark figure to work from....

1. Do you have a forced air furnace now?
2. Do you heat with gas, oil, propane or electric?
3. Do you have AC now?
4. How old is your current furnace/air conditioner?
5. Is your furnace in a basement, crawl space or attic?
6. Do you live in the US and if so what general area do you live in?
7. What is the approimate square footage of your home?

You can answer here or PM me. I will ask my husband when he gets home....He may have more questions too. Also, if you PM me the particulars of the est/quote you have received (i.e., size of the furnace and of the condenser quoted, etc.)

Take care