Thread: Switch for a dryer booster fan

I know there are a lot of opinions on the use of dryer booster fans.
I ran across one in a condo today. The total run of duct was about 35'. Elect dryer.
The booster fan is below the laundry room about 15' from the dryer. It is labeled
as a "Elicent AXC100A" fan.
Two questions: 1) Is this fan even proper for a dryer vent use? Looks like it is not from what I could find.
And 2). It is on a separate wall switch. Must be turned on separate from the dryer. I would think if a booster fan is allowed, it would have to be on an automatic type of switch (maybe a pressure switch) so it always comes on when the dryer is turned on. Comments?

Dryer Exhaust - Fantech
How do dryer exhaust fans work?

When the dryer is on, the patented pressure switch senses positive pressure in the duct and turns on the booster fan for a pre-determined time, at the end of the timer cycle the switch checks for positive pressure in the duct, if there is pressure in the duct the cycle continues.

Originally Posted by Rick Cantrell

Dryer Exhaust - Fantech
How do dryer exhaust fans work?

When the dryer is on, the patented pressure switch senses positive pressure in the duct and turns on the booster fan for a pre-determined time, at the end of the timer cycle the switch checks for positive pressure in the duct, if there is pressure in the duct the cycle continues.

OK, Not my question, but thanks anyway!!

Originally Posted by Rich Sumen

OK, Not my question, but thanks anyway!!

Sorry

It looks as though this fan is "proper for this use".
These are suitable for ducted ventilation systems in residential, commercial and industrial applications.
Elicent AXC Centrifugal Inline Fan - Size Options | Universal FansUniversal Fans Store

I was showing that at least some fans do come on automatically.

Originally Posted by Rick Cantrell

Sorry

It looks as though this fan is "proper for this use".
These are suitable for ducted ventilation systems in residential, commercial and industrial applications.
Elicent AXC Centrifugal Inline Fan - Size Options | Universal FansUniversal Fans Store

I was showing that at least some fans do come on automatically.

What makes you think it is proper?
The companies web site shows it being made for the gardening industry! Air venting.

Originally Posted by Rich Sumen

What makes you think it is proper?
The companies web site shows it being made for the gardening industry! Air venting.

I'm only repeating
click on this link:
Elicent AXC Centrifugal Inline Fan - Size Options | Universal FansUniversal Fans Store


This is what it says
The AXC TP high performance centrifugal in-line fans are available in 4 sizes from 100mm diameter to 160mm diameter. These are suitable for ducted ventilation systems in residential, commercial and industrial applications.

Originally Posted by Rick Cantrell

Sorry

It looks as though this fan is "proper for this use".
These are suitable for ducted ventilation systems in residential, commercial and industrial applications.
Elicent AXC Centrifugal Inline Fan - Size Options | Universal FansUniversal Fans Store

I was showing that at least some fans do come on automatically.

I say that is not proper for this use as those are for ventilation, not dryer ducts.

These dryer booster fans ( Continental Fan - Residential Fans & Air Purification ) have a model number which starts with a "D", for "Dryer"?.

Originally Posted by Rich Sumen

What makes you think it is proper?

What makes you think it's not proper?

Reading further it just says venting.
Since there is no mention of an auto-on feature, this fan is likely not a good choice for a dryer duct fan.

Originally Posted by Billy Stephens

What makes you think it's not proper?

This:

Originally Posted by Rick Cantrell

Reading further it just says venting.

Originally Posted by Jerry Peck

This:

Thank you Jerry, You are right and I see the fan type that should have been used.
I can also see where a separate switch could be a danger. Thank you.