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expiredpennysave posted Nov 29, 2025 10:14 AM

Biowind 4"x10" Smart AC Vent Cooling Booster Fan w/ Thermostat & Remote Control

$25

$38

34% off
+ Free Shippingat Amazon
76 Comments
62.6K Views
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Deal Details
Biowind via Amazon has Biowind 4"x10" Smart AC Vent Cooling Booster Fan w/ Thermostat Control & Remote Control (White) on sale for $25.24. Shipping is free.

Thanks to community member pennysave for finding this deal

About the Product
  • Quiet Register Booster Fan (Low as 18db)
  • Improve Wall/Floor Vents w/ Airflow
  • Energy Saving/Cost Effective AC Cooling
  • Remote Control w/ 0-10 Level Fan Speed
  • High Precision Temperature Sensor
  • Power-Off Memory
  • Turns On/Off w/ HVAC System via Proper Programming

Editor's Notes

Written by citan359 | Staff
  • About this Deal:
    • Limited time deal, while supplies last.
  • About this Store:
  • Additional Notes:
    • Please see the original post for additional details & give the WIKI and additional forum comments a read for helpful discussion.

Original Post

Written by pennysave
Community Notes
About the Poster
Deal Details
Community Notes
About the Poster
Biowind via Amazon has Biowind 4"x10" Smart AC Vent Cooling Booster Fan w/ Thermostat Control & Remote Control (White) on sale for $25.24. Shipping is free.

Thanks to community member pennysave for finding this deal

About the Product
  • Quiet Register Booster Fan (Low as 18db)
  • Improve Wall/Floor Vents w/ Airflow
  • Energy Saving/Cost Effective AC Cooling
  • Remote Control w/ 0-10 Level Fan Speed
  • High Precision Temperature Sensor
  • Power-Off Memory
  • Turns On/Off w/ HVAC System via Proper Programming

Editor's Notes

Written by citan359 | Staff
  • About this Deal:
    • Limited time deal, while supplies last.
  • About this Store:
  • Additional Notes:
    • Please see the original post for additional details & give the WIKI and additional forum comments a read for helpful discussion.

Original Post

Written by pennysave

Community Voting

Deal Score
+93
Good Deal
Visit Amazon

Top Comments

ji_mestone
512Comments
71Reputation
This is a good deal. I bought a few of these for our living room and kitchen last spring at $38 a piece (different generic brand, but same thing). We have large south facing windows and during the summer our unit just can't keep up (despite multiple HVAC tech visits saying there was nothing wrong). The airflow was always too weak and on 100+ temp days, the coolest it would get was 75/76, even though it was set at 72. These worked perfectly and kept our rooms at temp.
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Cjrmets1985
415Comments
66Reputation
Isn't Biowind just another name for a fart?
Go to Comment
asuka
2.7KComments
396Reputation
All farts are biowinds. Not all biowinds are farts.

Good option if you have a room that doesn't get enough airflow. Wish I had this as a kid.
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76 Comments

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Nov 29, 2025 1:39 PM
415 Comments
Joined Nov 2019
Cjrmets1985Nov 29, 2025 1:39 PM
415 Comments

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Isn't Biowind just another name for a fart?
4
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Nov 29, 2025 1:42 PM
2.7K Comments
Joined Oct 2008
asukaNov 29, 2025 1:42 PM
2.7K Comments

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Quote from Cjrmets1985 :
Isn't Biowind just another name for a fart?
All farts are biowinds. Not all biowinds are farts.

Good option if you have a room that doesn't get enough airflow. Wish I had this as a kid.
2
7
1
Expert
This user is an Expert in Home & Home Improvement
Nov 29, 2025 2:22 PM
7.5K Comments
Joined Oct 2014
firebirdude
Expert
This user is an Expert in Home & Home Improvement
Nov 29, 2025 2:22 PM
7.5K Comments
It's just a fan that sits in the register? So it increases air flow into that room, but steals it from everywhere else? Because it doesn't create more flow from the HVAC blower...
7
Nov 29, 2025 2:28 PM
1 Comments
Joined Oct 2025
PurpleBike3514Nov 29, 2025 2:28 PM
1 Comments

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Quote from firebirdude :
It's just a fan that sits in the register? So it increases air flow into that room, but steals it from everywhere else? Because it doesn't create more flow from the HVAC blower...
As an example, wouldn't it be a good option for a room that has more windows or is colder for other reasons?
1
Nov 29, 2025 2:30 PM
2K Comments
Joined Feb 2008
LongeviteNov 29, 2025 2:30 PM
2K Comments
Quote from firebirdude :
It's just a fan that sits in the register? So it increases air flow into that room, but steals it from everywhere else? Because it doesn't create more flow from the HVAC blower...
Yeah, instead redo the larger duct for the far side of the room, this can help to pull some more cool air for that room.

Not sure how safe to keep it on all the time.
7
Nov 29, 2025 2:45 PM
3.3K Comments
Joined Jan 2006
jnesetNov 29, 2025 2:45 PM
3.3K Comments
I'd love to power this externally forever...
Nov 29, 2025 3:01 PM
512 Comments
Joined Jan 2013
ji_mestoneNov 29, 2025 3:01 PM
512 Comments

Our community has rated this post as helpful. If you agree, why not thank ji_mestone

This is a good deal. I bought a few of these for our living room and kitchen last spring at $38 a piece (different generic brand, but same thing). We have large south facing windows and during the summer our unit just can't keep up (despite multiple HVAC tech visits saying there was nothing wrong). The airflow was always too weak and on 100+ temp days, the coolest it would get was 75/76, even though it was set at 72. These worked perfectly and kept our rooms at temp.
7

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Nov 29, 2025 3:02 PM
1.1K Comments
Joined Aug 2014
JohnybrkNov 29, 2025 3:02 PM
1.1K Comments

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These work great for houses that have 1 zone or even 2 zones for rooms that don't get cold or hot enough before the main system turns off. I have 2 of these in 2 different rooms. They have built in temperature sensors, that can continue working after the HVAC system has shut off, still pulling in cold or hot air that's in the register. They are super quiet and pretty slick aside from the cord that hands to the side, i push mine under the baseboards, so they stay out of the way, i do wish they were flat as well though.
1
Pro
Nov 29, 2025 3:43 PM
719 Comments
Joined Aug 2022
Kirkland-pickles
Pro
Nov 29, 2025 3:43 PM
719 Comments
Can I connect it to home assistant?
4
Nov 29, 2025 3:45 PM
335 Comments
Joined Aug 2017
PoppmaticNov 29, 2025 3:45 PM
335 Comments
If these are similar to the other register fan styles that basically use computer case fans, I don't agree with these things being quiet unless you have them on the lower settings. On higher settings, the fan hinun is quite apparent even from a few feet away. I recommend it only if you have a larger room or so you are further away from the register to hear it.
1
Nov 29, 2025 3:50 PM
2K Comments
Joined Aug 2011
Joseph06Nov 29, 2025 3:50 PM
2K Comments
Good for an attic room thats furthest from the thermostat sensor
Nov 29, 2025 3:51 PM
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Joined Aug 2014
JohnybrkNov 29, 2025 3:51 PM
1.1K Comments
Quote from KxrmaJunkie :
Can I connect it to home assistant?
Theres no need. When set correctly they work in conjunction with your HVAC. For example if you are using AC you can set the register to keep working until desired temperature is sensed say 68F, it will turn off once the temperature rises above that in the air duct. Same for heat, if the air duct no longer has hot air at 80F (you control the temp) it will turn off. Or plug this into a smart plug.
1
Nov 29, 2025 3:56 PM
684 Comments
Joined Sep 2009

This comment has been rated as unhelpful by Slickdeals users.

Pro
Nov 29, 2025 3:56 PM
719 Comments
Joined Aug 2022
Kirkland-pickles
Pro
Nov 29, 2025 3:56 PM
719 Comments
Quote from Johnybrk :
Theres no need. When set correctly they work in conjunction with your HVAC. For example if you are using AC you can set the register to keep working until desired temperature is sensed say 68F, it will turn off once the temperature rises above that in the air duct. Same for heat, if the air duct no longer has hot air at 80F (you control the temp) it will turn off. Or plug this into a smart plug.
My concern is the temp sensor being in the register, closer to the source of the cold air. This causes it to read colder then the room is and is therefore less accurate.

Can mitigate this by dynamically adjusting its set temp based on another temp sensor in the room center
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Pro
Nov 29, 2025 4:07 PM
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Joined Mar 2018
WooHoo2You
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Nov 29, 2025 4:07 PM
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Quote from firebirdude :
It's just a fan that sits in the register? So it increases air flow into that room, but steals it from everywhere else? Because it doesn't create more flow from the HVAC blower...
It might be good for a room on the other side of your house (vs your air handler / furnace) that doesn't get enough airflow because of the long or undersized duct work.

FWIW this claims 120 CFM and your standard blower is providing 400 CFM per ton. For example a 3 ton system is 1200 total airflow (by default). This isn't likely going cause any noticeable change for the rest of the house but might make that odd room in your house that is always too hot / too cold slightly more bearable. Especially if you had a bonus room where someone just spliced into the existing duct work when finishing it. Those tend to never have enough airflow.

P.S. I'm considering buying this for my laundry room with a HP water heater in it. The room turns into a cooler when the heat pump is running so this (in theory) could help balance the air to the adjoining rooms even if the HVAC system is off.
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