New member - first post. Hope some of you could shed some light on this for me. Here's what I'm dealing with. 1800SF ranch in SE michgan, our main furnace is a high efficiency 70K BTU nat gas furnace with variable speed blower. Gas bills are not too outrageous but wouldn't mind reducing them greatly, plus nat gas has been steadily increasing in cost. My wifes dad recently passed away and he heated with wood (wood/oil combo) for about 30 years and was still stacking his own up untill last year - kind feel like I have no excuse not to, plus I could use the excercise. I have probably a couple years worth of free wood on my lot - dead and dying elm, ash, some box elder (probably not great to burn). After that I think I could still get access to mostly free wood if I want to put in a little labor to get it. Based on the lower cost of natural gas I don't think I can justify a real expensive furnace and was thinking something in the $1500 ball park could be justifiable for me. Now that I am looking at them I am not sure what I should really be looking for. I know that will not get me a top of the line furnace but there seems to be some decent ones in that ball park. These are my questions: Is a draft blower recomended, or is a manual good enough? Seems like it'd be nice to more thermostat control with the blower. How much of a difference do you see with secondardy air combustion? Secondary heat exchanger? Size of firebox? Is bigger necessarily better? Do any of the above make a big impact on effeciency? Worth getting one with its own blower or just use the current furnace blower? Can they be hooked up to utilize variable speed capability of current furnace fan? If getting one with a blower is a multi-speed blower much prefered? Anything else I may be over looking let me know. In the $1500 range it seems like the Yukon Eagle Big Jack is nice furnace but fan is extra. There are others less than this but they seem somewhat cheaper. Englander does not seem bad but if I recall they do not come wiht a draft blower. The Caddy's (US Stove 1950) look nice but in the $2K range. Any help is appreciated.