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Internet # 326824723

Model # SFV304X10

Store SKU # 1010152245

Smart Register Vent Booster Fan - 4"x10"&4"x12"- iOS & Android Apps, Room Temperature Control, 30% Energy Saving

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Product Details

About This Product

New version with all new software & App: Easy DIY Install. Easy to Use - install your SmartCocoon booster fan into your home's vent within minutes. Use With Or Without The App - You simply have to drop the device in the floor vent & plug it in. The AI will do the rest. SmartCocoon senses and learns when your HVAC system is on and only pulls in more warm or cold air into that desired room making it more comfortable almost immediately. It automatically operates in "Energy saving" mode without the app. Smart Sync with all thermostats - No matter if you have a smart or conventional thermostat, your device works with all of them. Barely Visible, Highly Effective - SmartCocoon booster fan sits under your existing vent grill and boosts the air when you need it without changing the look of your room, keep using your existing grills. Unique design - Fits in almost any 4 in. x 10 in. & 4 in. x 12 in. vent boots and the springs keep it tightly in proper depth allowing common grills to be placed on top. Get More Control from anywhere with the iOS and Android App (optional) - Choose between 4 different operation modes: Auto (set room temperature), Eco (best energy savings), ON & OFF. Set schedules, and control fan speed (and noise).


  • Control fan speed (and noise level) - you can set the fan speed with the app and control how fast your room will get to your desired temperature, you can choose any level between 1 to be stealthy quiet and 12 I want this room up to temperature fast
  • Wi-Fi enabled - connect to Wi-Fi (optional) in order to benefit from all the features using the app, note: if your router has both 2.4 and 5G under different names, make sure to connect the device to 2.4G
  • Set room temperature (microzoning) - Set your desired temperature per room or area
  • Scheduling per room - define operating mode and schedule per room with specific fan speed settings
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Product Information

Internet # 326824723

Model # SFV304X10

Store SKU # 1010152245


Dimensions: H 1.3 in, W 9.6 in, D 3.7 in


Product Depth (in.)

3.7 in

Product Height (in.)

1.3 in

Product Width (in.)

9.6 in



No Additional Features

Pack Size


Power Options

Hardwired, Plug-in

Product Weight (lb.)

1.6 lb

Remote Access

No Remote Access

Requires Hub?

No Hub Required



Smart Home

Smart Home Enabled

Smart Home Protocol


Voice Control Hub Required

No Voice Control

Works With


Warranty / Certifications

Manufacturer Warranty

One year from the date of purchase

Questions & Answers

Typical questions asked about products:

  • Is the product durable?
  • Is the product easy to use?
  • What are the dimensions of the product?

Customer Reviews

4.5 out of 5

  • 4.5 out of 122 reviews
  • 86% recommend this product
Filter by:
Showing 1-10 of 122 reviews
Small change for the better
[This review was collected as part of a promotion.] The installation of this product was initially tricky, but between two of us we finally got it figured out. We also encountered some issues with the app & repeatedly being kicked off & asked to reset the password as it wasn’t recognizing the password we had already set. Once we troubleshot these issues and actually had it working in the master closet that is furthest from the a/c unit in the house (vent-wise) we did see a small increase in air flow/cold air distribution. Was it enough to buy more of these for the rest of the house - not necessarily, but it did prove somewhat effective in September when we were still having higher than average temps. I will be curious to see how it performs next summer in the thick of June & July!
    Pretty good probably wouldn’t buy one though
    [This review was collected as part of a promotion.] This smart fan needed to be on a battery I didn’t like that the cord showed all the time and that it had to be plugged up. It did have some noise from it but it wasn’t bad it was actually a relaxing sound.
      [This review was collected as part of a promotion.] Was very difficult to get it to connect to our home wifi it took several attempts. Installation went well was super easy. We have good ac we didnt notice to much of a difference but it did keep the warmest room a bit cooler.
        Keeps air cooler and circulating
        [This review was collected as part of a promotion.] Didn’t have much expectation on this so I was super excited to try my daughters room has always been that room that’s too hot and too cold. I was excited to receive the smart cocoon booster fan it sync with the WiFi in your home and turns on and off to regulate and circulate the air. It hasn’t been too hot or cold lately to see just how well it adds that extra temperature but we can tell the room being cooler when it’s on. Very happy would recommend!
          easy to use
          [This review was collected as part of a promotion.] It was too small for my vents. I can’t honestly give my opinion as I wasn’t able to use it. But it’s easy to set up and I can see it working would try it if it was the right size
            [This review was collected as part of a promotion.] I love this product. It’s decreased our monthly bill and is easy to use. I’m thankful for a handy husband to help me install it. But I do enjoy having the product at our house.
              Works nicely and effectively
              [This review was collected as part of a promotion.] Quite easy to set up and use with the app on my phone. The app is user-friendly and helps me even before I get home so that things are already up and running. I like the fan design and the durability.
                Boosts airflow
                [This review was collected as part of a promotion.] I really like this smart vent because it’s unique and easy to install. You also can use it with or without the app and it pulls out warm/cold air depending on what is needed to create a comfortable environment. It’s made a difference immediately and quiet.
                  Felt the difference
                  [This review was collected as part of a promotion.] Felt the air difference quite instantly. Though it could get noisy (like a laptop fan) it makes the differnece in the cooling of the room. I highly reccomend
                    Easy to use
                    [This review was collected as part of a promotion.] A great way to “boost” your AC and cooling for the house! It was so easy to slide into our fan slot and then program via the app. Comparing it to a vent that doesn’t have the cocoon set up; it has some power and works really well. I’m happy we have it!
                      Showing 1-10 of 122 reviews