room is 3'x5'x29" the temp gets to 86.3 i have 8" duct fan but no speed control would speed control increse duct speed to pull more hot air all help welcomed free tokers of da world.
No, your fan will start and run at full speed. Speed control would be used to slow it down. If you have any duct work attached, make it as short a run as possible, with as few bends and turns as possible.
