Quote Originally Posted by Mechanic688 View Post
My new(used) water heater I just picked up from C.L. for the house has a blower on top for exhaust. I imagine their used a lot in newer homes so as they go bad we'll be seeing them with the electric blower motors.
The blower is called a power vent and they are used on LP water heaters. You will not usually find a power vent on a natural gas water heater. Whats the difference?? Good question not sure why they have to be on the LP heaters.