Will it drain my RV battery?

It draws 4W at 12V, about a third of an amp, so it runs a long time on a charged battery. Pair it with a battery monitor if you leave it on overnight.

Is it reversible or intake only?

It is an exhaust fan. It pushes hot air, smoke and odors out; it does not reverse to blow outside air in.

Can I control the speed?

No. It is a single-speed fan at 3000 RPM. For variable speed or a thermostat you need a different controller or fan.

What size opening does it need?

The housing is about 16 by 15 by 8 inches. Check your window or wall opening against those dimensions before cutting.

Does it come with a mounting kit?

The listing does not detail included hardware. Confirm screws, sealant or a frame are included before you plan the install.

Will it work in a car or van?

Yes, any 12V DC supply works. It is sized for a window or wall vent, so plan where the opening goes.

Where is the Yajisi 12V 4W RV Cooling Exhaust Fan cheapest?

At Walmart, for $27.35, as of our latest check.

Yajisi 12V 4W RV Cooling Exhaust Fan

Best price now

$27.35at WalmartChecked 18 min ago

Prices are checked against each store and labelled with when.

Visit Walmart

Yajisi 12V 4W RV Cooling Exhaust Fan

Best price now

$27.35at WalmartChecked 18 min ago

Prices are checked against each store and labelled with when.

Visit Walmart

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It checks today's price at every store, compares the alternatives and answers in about a minute.

Price facts

Lowest price today: $27.35 at Walmart (checked Nov 13, 2026).

Our take on the Yajisi 12V 4W RV Cooling Exhaust Fan

The Yajisi is a 12V DC exhaust fan for RVs, campers and cars, built to pull heat, smoke and odors out through a window or wall opening. It runs at 3000 RPM on 4W, so it moves air without leaning hard on a house battery. The ABS housing measures roughly 16 by 15 by 8 inches, and it mounts externally. It suits owners who want a simple powered vent rather than a full roof fan install. Against roof vents and reversible Fantastic or Maxxair fans, it is a one-direction exhaust unit with no thermostat, remote or rain sensor, so it trades features for a small, cheap-to-run package.

Best forRV and camper owners venting heat or cooking odorsVan and car campers with a 12V outletBudget-minded buyers who want a simple exhaust fanWindow or wall venting in a fixed spot

Pros

Low 4W draw is easy on a 12V battery
3000 RPM gives strong exhaust airflow for its size
Runs on standard 12V DC power
ABS housing is light and durable
Mounts to a window or wall opening

Cons

Single-speed, no variable control
No thermostat, remote or rain sensor
Exhaust only, not reversible
Noise at 3000 RPM may be noticeable in a small cabin
Cutout and mounting hardware requirements are not spelled out

Yajisi 12V 4W RV Cooling Exhaust Fan prices at every store

WalmartNew
In stockSold by Yajisi
$27.35Free shippingChecked 18 min ago
Visit Walmart

Yajisi 12V 4W RV Cooling Exhaust Fan price history

$27.35$23.95

Nov 2Nov 13

Lowest price we've seen: $23.95 on Nov 2 at Walmart; highest $27.35 on Nov 13. Tracked across 1 store since Nov 2.

About the Yajisi 12V 4W RV Cooling Exhaust Fan

The Yajisi RV Cooling Exhaust Fan is a 12V ventilation fan for motorhomes, camping vehicles and cars. It removes heat, smoke and odors from the cabin and brings in outdoor air. The fan runs at 3000 RPM.

The housing is made of ABS. The fan runs on 12V DC power and uses 4W, so it draws little power from the battery on long trips. It mounts on a window or a wall.

Voltage: 12V DC
Power: 4W
Speed: 3000 RPM
Material: ABS
Dimensions: 16 x 15 x 8 in (40.6 x 38.1 x 20.3 cm)
Mount style: Wall mount, window mount
Type: Kitchen
Brand: Yajisi

Specifications

Type: Kitchen
Mount Style: Wall Mount, Window Mount
color: Black
size: 16" x 15" x 8"

Questions and answers

Will it drain my RV battery?: It draws 4W at 12V, about a third of an amp, so it runs a long time on a charged battery. Pair it with a battery monitor if you leave it on overnight.
Is it reversible or intake only?: It is an exhaust fan. It pushes hot air, smoke and odors out; it does not reverse to blow outside air in.
Can I control the speed?: No. It is a single-speed fan at 3000 RPM. For variable speed or a thermostat you need a different controller or fan.
What size opening does it need?: The housing is about 16 by 15 by 8 inches. Check your window or wall opening against those dimensions before cutting.
Does it come with a mounting kit?: The listing does not detail included hardware. Confirm screws, sealant or a frame are included before you plan the install.
Will it work in a car or van?: Yes, any 12V DC supply works. It is sized for a window or wall vent, so plan where the opening goes.
Where is the Yajisi 12V 4W RV Cooling Exhaust Fan cheapest?: At Walmart, for $27.35, as of our latest check.

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