Quick answer
Do not put an ordinary fan under a blanket. A bed fan is different, because the fan unit stays outside the bedding and only the air goes under the covers.
- Keep standard fans and their cords out of the bed.
- Do not put a blanket on top of a fan, since blocked airflow can overheat the motor.
- A bed fan can help you feel cooler for less than running the AC all night.
If you get super hot and sweaty at night, you might want a fan blowing directly on you while you sleep.
Can you put a fan under a blanket?
Do not put an ordinary fan under a blanket. A bed fan is different. The fan unit stays outside the bedding and only the air goes under the covers. The BedJet sits under or beside the bed and sends air in through a hose. The bFan stands at the foot of the bed and blows air between the sheets.
The rest of this article covers why people use bed fans, which fans should never go under a blanket, and some examples of bed fans.
5 Good Reasons To Use a Bed Fan
There are good reasons to blow air under your covers with a bed fan.
The reasons range from temperature control to sleep hygiene. The right kind of fan can even help you sleep better.
Here are five good reasons to consider a bed fan:
1) Great Way To Cool Yourself Down
Setting up a fan to blow air directly on your body is a great way to prevent yourself from overheating.
Some people get very hot at night, such as night sweats during menopause.
It’s better than a fan in the corner of the room that doesn’t reach you through covers. Of course, this doesn’t mean you should blast the fan at its max speed all night.
With this method of cooling yourself down, you want to start strong but then taper off until your temperature is where you want it to be.
2) Companies Make Special Fans For Under Blankets
Companies make custom-made fans designed specifically for circulating air under blankets. These fans are called bed fans.
What is a bed fan?
Bed fans are compact, yet powerful fans that look more like small robots than traditional fans.
They are designed to run all night long and to be quiet.
Bed fans consist of:
- A flat base for stability
- A flexible shape for maximum adaptability
- Internal blades
- Some include a tube
- Low profile to safely blow air under the covers
- Attachment feature to keep the fan “stuck” to the bed
You might hear a bed fan called a “sheet fan” or an “under a duvet fan.”
Check out this one-minute video that demonstrates one innovative version of a bed fan:
3) Encourage Connection
It’s difficult to cuddle with your partner when both of you feel like hot lava.
Insert some cool air to lower the temperature and suddenly there is no reason not to snuggle up to your favorite person.
By using a bed fan, you encourage connection and intimacy.
4) Help Your Sleep Hygiene
When you sweat all night, you naturally create an unpleasant odor.
Your sleep hygiene is a major factor for your comfort and health, making it a good reason to get a bed fan.
Many people sleep better and deeper in a cooler (but not cold) temperature.
Therefore, you wake up feeling more rested, which boosts mood, critical thinking, energy, and productivity.
5) Stay Cooler For Less
An air conditioner can be incredibly expensive to operate all day and all night long.
A bed fan costs very little to run. The maker of the bFan says it uses an average of only 12 watts.
Saving money over time is a huge advantage of bed fans. With the growing cost of powering and cooling your house, this is a good reason to consider investing in a bed fan.
Is It Safe to Put a Blanket on a Fan?
You might be wondering if it’s safe to put a blanket on a fan. For that matter, what about on a duvet or sheets?
No. Do not put a blanket on top of a fan. With a bed fan, only the air goes under the covers. The fan unit and its cord stay outside the bedding.
Bed fans are made to send air under the covers while the unit sits outside the bedding. BedJet says its unit is UL certified and puts no wires, water or electricity in the bed. Follow the maker’s instructions.
You can consider a bed fan a bladeless fan because there are no external blades.
Some people ask, “Is it ok to put a fan on the bed?”
You don’t want to put any other kind of fan under your sheets, blankets, or duvet. Fans such as floor fans, tower fans, desk fans, pedestal fans, or any other “standard fan” can pose a risk to you if you place them on your bed or under your covers.
What Fans Can You Put Under a Blanket?
The next logical question is, “What fans can you put under a blanket?”
None. Even a bed fan sits outside the bedding and only sends its air under the covers.
Ordinary fans are not made to be covered by bedding, and neither are their cords. Vornado tells owners not to cover the cord with rugs or similar coverings. ESFI warns that if a cord is covered, heat cannot escape, which may result in a fire hazard. Keep standard fans and their cords out of the bed.
What about bladeless fans?
Bladeless fans are not made for use under blankets either.
Covering any fan blocks its airflow, and the motor can overheat.
Therefore, stick with a bed fan.
Examples of Bed Fans
There are a number of good bed fans on the market.
They are not cheap, but they cost little to run.
The best-known bed fan is the BedJet. It is not one of the cheaper options. BedJet lists the BedJet 3 at $699 before discounts. The bFan sells for about $205.
Here are some other bed fan alternatives:
| Bed Fans | Type |
|---|---|
| BedJet | Unit under or beside the bed, air delivered by hose |
| bFan | Fan at the foot of the bed |
| ChiliPad Cube | Water-based mattress pad, not a fan |
How Else Can You Make Your Bed Cool?
You have lots of options to cool your bed at night. A bed fan is only one option.
You can also get a:
- Cooling mattress pad
- Cooling pillow
- Cooling sheets
- Cooling blanket
You can even use several of these products together for a wonderfully chilly night of sleep.
Final Thoughts: Can You Put a Fan Under a Blanket?
A bed fan can help you feel cooler in bed for less than running the AC all night. Keep the fan unit itself, and its cord, outside the covers.
If you’re looking for a combination of cooling and style, take a look at the other articles on fans.
You might also enjoy these articles:
- Can Fans Hurt You?
- Do Fans Deter Pests? Answers by Pest
- What Does Ion Mean On a Fan?
- Where Can You Put a Fan?
Sources
BedJet (BedJet 3 product details)
bFan (product details)
ESFI (cord safety)
Vornado (owner safety instructions)
Reviewed October 2026. We corrected the main answer: ordinary fans should not go under bedding, and bed fans keep the unit outside the covers. Safety guidance from ESFI and fan makers was added, and claims of personal use we could not support were removed.