I took my exhaust fan apart for cleaning and bearing replacement, now I'm not sure which way the fan 'blades' are meant to be facing on the motor shaft. I put it together the way it seemed right to me, but honestly, it might not be the right way. I just don't know.
The blades are a disk with maybe a dozen arms, and each arm forms sort of a cup (you might say more like two sides of a four sided cup). IOW, each arm is folded into a couple of surfaces at right angles to each other. If you've seen a fan like this you'll know what I mean, right?
Anyway, my exhaust motor turns counter-clockwise (seen from the motor side of the fan), so I figure the cups/blades ought to face toward the exhaust outlet so they "throw" air out to the stove pipe. This means the fan disk would be mounted on the motor shaft with the open side of the fan blades/cups facing the motor (they're facing away from where the exhaust comes into the fan housing).
But I was looking at an England Stove Works pellet stove at the home center, and inside the exhaust port I could see that the fan blade cups were facing back into the fan instead of outward toward the stove pipe. I guess their fan is designed to turn clockwise? Or maybe I've got fan blade design figured wrong?
I went home and reversed my fan. It seems to move air just as well either way, if the fact that the flames in the firebox are not lazy at all is any indication. But I'd like to put the fan blade disk back on the way it was designed to be. I can post a pic of what I'm talking about, but if anyone knows about this and can just tell me how to mount the fan correctly, that'd be great.
Thanks a bunch in advance.
--Ned
Envirofire EF1 (1991)...still going.
The blades are a disk with maybe a dozen arms, and each arm forms sort of a cup (you might say more like two sides of a four sided cup). IOW, each arm is folded into a couple of surfaces at right angles to each other. If you've seen a fan like this you'll know what I mean, right?
Anyway, my exhaust motor turns counter-clockwise (seen from the motor side of the fan), so I figure the cups/blades ought to face toward the exhaust outlet so they "throw" air out to the stove pipe. This means the fan disk would be mounted on the motor shaft with the open side of the fan blades/cups facing the motor (they're facing away from where the exhaust comes into the fan housing).
But I was looking at an England Stove Works pellet stove at the home center, and inside the exhaust port I could see that the fan blade cups were facing back into the fan instead of outward toward the stove pipe. I guess their fan is designed to turn clockwise? Or maybe I've got fan blade design figured wrong?
I went home and reversed my fan. It seems to move air just as well either way, if the fact that the flames in the firebox are not lazy at all is any indication. But I'd like to put the fan blade disk back on the way it was designed to be. I can post a pic of what I'm talking about, but if anyone knows about this and can just tell me how to mount the fan correctly, that'd be great.
Thanks a bunch in advance.
--Ned
Envirofire EF1 (1991)...still going.
