Internet #203582675

Model #CM300B

Cyclone Booster Fan Plus with Built-In Thermostat in Brown

  • 45° angled blades circulate air through the whole room
  • Fits 3 in./4 in. wide by 10 in. long ducts
  • Automatic on/off with temperature sensor for saving energy
  • See More Details

Frequently Bought Together


Product Overview

Is there a room in your house that is usually cooler or hotter than the others? That's bad airflow and even the best homes have it. Airflow in central air homes weakens the further it travels through the ducts. Cyclone's Booster Fan Plus helps solve that problem. The Cyclone Booster Fan Plus boosts the idle air from vents outward into the rooms where it is needed most, making every room in your home equally COMFORTABLE. The innovative design features a built-in thermostat that senses heated or cooled air and turns the fan on and off automatically, lowering your heating and cooling costs. That too-hot or too-cold room proves that it's happening to you. The Cyclone Booster Fan Plus helps SAVE ENERGY and MONEY. Just set it and forget it!
  • Fits in both a 3.25 in. x 10 in. and 4 in. x 10 in. duct
  • Works for all seasons
  • 45° angled fan blades push air into the center of the room
  • Turns on and off automatically with a temperature sensor
  • Easy to install
  • Plug in cord
  • Available in 3 colors to choose from

Info & Guides

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Cyclone Booster Fan Plus with Built-In Thermostat in Brown
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Name7-1/4 in. x 7-1/4 in. to 8-3/4 in. x 8-3/4 in. Insulated Magnetic Register/Vent Cover for HVAC Steel Registers/VentsCyclone Booster Fan Plus with Built-In Thermostat in BrownMagnetic Mail Slot Cover in White
Product Weight (lb.)13.381
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Product Depth (in.)
5.25 in
Product Height (in.)
3.25 in
Product Width (in.)
11.25 in


Product Weight (lb.)

Warranty / Certifications

Manufacturer Warranty
1 year manufacturing defects

Questions & Answers


If you do not have ac attached to your furnace will this still help circulate cooler air from yo...

Asked by Sal April 12, 2019

I would assume if that’s where the vent will be pulling the air from

Can this be hardwired from behind (above the ceiling) in new construction, instead of using the c...

Asked by AWD April 2, 2019

Hello, It is not recommended that this unit is hardwired for safety reasons as the unit has never been tested as a hardwired unit. Any modifications to the Booster Fan will result in a void warranty.

How loud is this unit?

Asked by Noise March 12, 2019

Very quiet. It is less than 2 sones.

Is it just a fan or does it have a heating coil ?

Asked by Patsy January 28, 2019

Hello, This fan works with the furnace and air conditioner to push air from the ducts. No heating coil.

Vent only 2 1/2 inches by 11 inches anything smaller? wqe.

Asked by AR July 17, 2017

Hello AR, The Cyclone Booster Fan Plus with Built-In Thermostat that fits in both a 3 in. x 10 in. and 4 in. x 10 in. duct seems to be the size that we offer on Thanks for shopping Home Depot!

What material is this made of?

Asked by Aim February 11, 2016

This is made of steel.

how many CFM's is unit rated for?

Asked by vick August 19, 2015

45 cfm at 12.5-14 watts

Customer Reviews

  • 3.2
    out of 72 reviews
  • 56% recommend this product
Filter by:
Showing 1-10 of 72 reviews
Very nice product. I use it every day. Works great!
by Angie
Satisfied with product.
Pro- It is working as expected. I use it for winter season and it helps to raise room temperature by atleast 3-4 degrees, from 17 to 20 deg cel. Con-could have been little less noiser. It doesnot insert properly since my room vents are not straight deep but bent at an angle after 4 inchs.
by Gsd0301
It works but is very poorly made. Very noisy while...
It works but is very poorly made. Very noisy while running.
by DennyB86
They're garbage. After using them for approximately three months, they either stop working or make terrible noise, due to the bearing on the end of the fan roller. This is a terrible manufacturing mistake which could be corrected with a more significant bearing! You should get your act together and let Cyclone Team know the product they produce is CRAP!!!
by Airport Expert
Don't waste your money for Cyclone Booster Fan+
Totally useless device, barely increases air movement from register. Going to return it to Home Depot whenever store will be open again.
by JoeTheK
Response from Cyclone Range HoodsJan 13, 2021
I’m sorry to hear that you are unhappy with the booster fans performance. It is meant to give the airflow a boost but if there is little or no air coming from the vent, due to too many bends, a very long run etc. there is not much it can do. We have many customers who find the booster fan works quite well for them, we are sorry it doesn’t work well for you. CycloneRangeHoods
Worth Every Penny
These fans are perfect to bring up the heat from my basement woodstove in the winter, and the cool air from the basement in the summer!
by Mac Zelinsky
works good just as they say it does
Works great. brings the hot air up just great' I think I will get another one for a different room .
Floor fan
Product works, but not a tremendous amount of air flow.
Response from Cyclone Range HoodsSep 11, 2020
Hello, we have found that closing the door to a room with the Booster Fan for a while will help the cooled/ heated air to accumulate. For more information/ assistance please feel free to contact the manufacturer at 1-888-293-5662 CycloneRangeHoods
Register fan
Works great We have in our family room above the garage It’s a big difference in the temperature
Kind of loud; works.
This fan works to pull air through the vents. It is fairly loud (in comparison to a pedestal fan) and causes the floor to vibrate. Still, it performs as expected and was a worthwhile purchase.
by Bbb888
Showing 1-10 of 72 reviews