A hot air furnace blower will be belt driven, at least all the ones I've seen. Maybe some newer stuff has direct drive I don't know. I did just google them and I guess a lot of them now are direct drive.
You could change blower speed by changing pulleys.
http://www.yukon-eagle.com/FURNACES...RCIRCULATORBLOWERMOTOR/tabid/110/Default.aspx
You could change blower speed by changing pulleys.
http://www.yukon-eagle.com/FURNACES...RCIRCULATORBLOWERMOTOR/tabid/110/Default.aspx
