[EricH]

Let's put it this way: The motor runs on 115 volts. A 12V battery provides about a tenth of that.

So whatever the motor says it'll put out in terms of power, you can expect the actual power output to be no more than about a tenth of what it says if the voltage is the driving factor. (Current--amperage--is a different factor, and can have an effect as well.)

What you have is a household-voltage, low amperage motor. You won't trip a lot of breakers with it, but you won't be using its full potential.

Not ideal.

The exception would be if it has internal voltage regulators to take 115V down to 12V--and then I'd say to remove those for this use, as 12V is your max.

I'd go with the wheelchair motors instead--those are much more likely to be 12V or something in that range.

The fan motor would depend on what type of fan and the ratings on the voltage and amperage were.