I don't understand; You say you don't want any control, Then you say you want them to sit at the minimum PWM speed.
If you are using minimum PWM speed, you are controlling the fan speed. Without control, PWM fans run at full speed. But that's the tip of the iceberg, I don't understand your philosophy.
You buy a fan that is made to be thermostatically controlled, then you use this control feather to turn it into a slow fan that will not react to protect the computer from over heating.
Why not just buy slow cheap fans to start with. That way you can use the money you save to help replace the parts that go bad when you burn up your computer.
Mine is set to run quietly (50%), but a hurricane goes through my CPU cooler if it reaches 150 degrees Fahrenheit. My CPU fan is 38x120mm with 135cfm at max speed. Each time your CPU overheats, this takes at minimum, few months of its life away. The only time I ever hear the fan is when I run a CPU burn-in program.
Edited by Luke Cool - 1/21/15 at 4:59am