So I'm in the market for a boiler after being fed up 110% with propane. I'm looking at the classic edge 550 and 750. Dealer telling me the 550 will heat my 2500sq ft home and a shop 30*25 without issue, yet the stove claims up to 2200sq ft. Now the 750 is almost $2500 more and rated at 3300sq ft, but assume obviously burns ALOT more fuel. Are these just safe numbers they give? Would the cost of the 750 pay for it's self in labor on having to split less wood and running boiler at lower loads even though it holds almost double. Maybe sell me on a different brand of stove? I'm use to all non epa stoves and I've googled for days now and everything always conflicts things on pros and cons and reviews and such. I may not always be able to load up 2-3yr old seasoned oak, so this also has to be accounted for, not saying I don't have 20% wood on hand as I do but not oak and such. Starting out it'll take a few years to gather the load at first to properly dry the "prime woods". I ask because I'm at the age to start a family(scarey to even say that haha) and my home is a 1874 home with as you guessed pretty poor insulation and being at 66 in winter I'm over it I want 75 walk around in boxers temps not pants and hoddie temps. I apologize for the lenthy post but I like to work out every detail from A-Z on everything I do before starting a task especially a $10-14k task.