Power consumption of blower?

[NeoMoses]

I've just taken the heater blower from an old Ford Tempo I had. It's a 12V blower, but I can't seem to find how many amps it's rated at, and the fuse panel is gone from the car.

I'm thinking this thing is going to take a lot of power to run. Does anyone know how much? For example, if it uses 30 amps at 12V, how many watts is that? Would you recommenc that I get a seperate power supply for this blower? (that's what I'm thinking) I have a 300W PS in my system right now. TIA.

[CrystalMethod]

Htey're usually rated between 10 and 20 amps, depending on the make and model. I'd avoid using such a large blower, as it is not magnetically shielded.

[NeoMoses]

ok, here's what I have planned for this blower. I'm going to put it in my attic and duct the cold air from my attic to my computer case. It should take a maximum about 2-3 feet of ducting to accomplish.

Would enclosing it in a metal case (such as an old computer case) give sufficient magnetic shielding? Other than not being magnetically shielded, it's perfect for my needs. High CFM, Low noise...

[Crazy Jayhawk]

Here are some formulas you can use to compute wattage, not just with the blower, but with other things as well.

Watts = Amps * Volts
Watts = Amps * Amps * Ohms
Watts = Volts * Volts / Ohms