Question 1

Is there an on/off switch, or is it constantly running? I have one plugged in my basement subfloor-how can I tell if it is working/running?

Accepted Answer

It does no come with an off/on switch, but you could have one wired in if wanted. they are designed to run continuously. the fan runs quietly, but you can hear it if stand close. Try unplugging and plugging it back in to hear the difference. If you can't hear it, it's not running. You can also feel some slight vibration if you put your hand on the outside of the fan.

Question 2

Do the Fantech fans run either in upward or downward configuration, ie as an exhaust unit or purge unit?

Accepted Answer

It works both ways. Whatever way you install it.

Question 3

Can the speed be varied with like a dimmer switch?

Accepted Answer

Your best bet is to contact Fantech and pose the question to their tech staff for their recommendation.  A light dimmer will not work and most certainly damage the motor. I prefer to first properly match the CFM rating of the fan to the space you want to ventilate, and then install a timer switch for the on and off control, Then push 30, or 60 min run time, then walk out the door.  In many cases people do not want to leave the fan on all day because they leave home for work.  All the moisture is not removed before they turn off the fan.  The timer eliminates that problem.  Just set the time and leave home.  If the fan is the correct CFM for the space, one hour of run time completely removes all the moisture and automatically shuts off.  Remember the fan is designed to operate 24 hrs. a day continuous operation. I don't see the reason for changing the speed of the motor.  If you have the room for double insulated duct in your house,  you can install the fan motor 25 or 30 feet away from your bathroom for a very quiet ventilation system. So just to review, these fans move a lot of air, they run super quiet, and with the timer switch you set 5, 10, 20, 30, or 60 minute run time and leave the room. I would not recommend slowing down the motor.

Question 4

What is the minimum temperature for operation?

Accepted Answer

I don't know the minimum operating temperature, but it appears that Southern Connecticut is too cold.  I've gone through two in the last 15 months, and both failed toward the end of winter.  I don't know if the problem is condensing moisture running into the unit, or the pure cold, or if the fans are just low quality and the cold had nothing to do with their failure.

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Fantech FR-150 In-Line Centrifugal Duct Fan, 6-Inch

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