FAQs

What is CoolJet?

CoolJet is a compact, USB‑C–powered personal air cooler designed to create a refreshing chill zone around your desk, sofa, or bedside. It uses smart evaporative cooling to deliver cool, fresh airflow in about 90 seconds — without the noise, installation, or high electricity bills of a full air‑conditioning system.

Is CoolJet an air conditioner?

CoolJet is a personal evaporative air cooler, not a compressor‑based AC. It’s designed to cool the space around you (your “personal zone”) rather than an entire large room. For bedrooms, home offices, and small spaces, it delivers noticeable, comfortable cooling with far less energy use.

How does CoolJet work?

  • You fill the top tank with water (and optionally add ice cubes for extra chill).
  • The ultra‑quiet motor draws air through the moistened cooling core.
  • As the air passes over the water, it picks up coolness and a touch of humidity.
  • The result is a gentle, chilled airflow that creates a comfortable micro‑climate around you.

How long does one fill last?

A single fill can run for up to 8 hours, depending on the fan speed and ambient conditions. Many customers use one fill to get through a full night’s sleep or a full workday at the desk.

How fast does it start cooling?

You’ll feel a noticeable personal cool zone in about 90 seconds. For the coldest air, add ice cubes to the tank before turning it on.

How loud is CoolJet?

Very quiet. CoolJet is engineered to be whisper‑quiet, with a soft hum that’s easy to sleep or work through, even on the highest setting. It’s a favorite for bedside use and video calls.

How many fan speeds does it have?

CoolJet features three fan speeds, so you can dial the breeze from gentle to full chill with one button.

Does it use a lot of electricity?

No. CoolJet is powered over USB‑C and draws only a small fraction of what a traditional air conditioner uses. It’s designed to run for pennies a day, helping you stay cool without sky‑high energy bills.

Can I use CoolJet outdoors?

Yes. CoolJet is light and portable, making it ideal for patios, balconies, backyard desks, or garden offices. Just keep it on a stable, dry surface and use a suitable USB‑C power source.

Is it hard to set up?

Not at all. There’s no installation and no tools required. Just fill the tank, plug it in over USB‑C, and it’s running in seconds.

Do I need special water or filters?

No special water or filters are needed. Use regular tap water in the tank. For best long‑term performance, empty and rinse the tank occasionally and let it dry when not in use for extended periods.

Can I add ice or cold packs?

Yes. Adding ice cubes (or small chilled packs that fit safely in the tank) is a great way to boost the cooling effect and enjoy colder airflow on very hot days.

How many CoolJets do I need?

CoolJet is a personal cooler. Most people use one per room or per person; many customers order a couple for the home to cover multiple spaces like the bedroom, living room, and home office.

Is it safe to use while sleeping?

Yes. CoolJet is a favorite for bedside use. Its quiet operation and up to 8‑hour runtime make it ideal for overnight comfort, helping you avoid sweaty, restless nights.

Can I use CoolJet in a humid climate?

CoolJet works in a range of conditions. In very humid environments, the temperature drop may feel less intense than in drier air, but many users still enjoy the fresh, moving breeze and improved comfort, especially when using ice.

Where can I use CoolJet at home?

Anywhere you want a personal cool zone:

  • Bedside table for better sleep
  • Desk for focused work or study
  • Sofa for relaxed TV time
  • Kitchen or balcony for cooking and chilling
  • Shared apartments and rented rooms where AC isn’t an option

Is CoolJet good for renters and shared apartments?

Absolutely. CoolJet needs no installation, no mounting, and no permanent changes to your space. It’s an easy, portable way to enjoy cool air whether you own, rent, or live with housemates.

What power sources can I use?

CoolJet runs over USB‑C. You can power it with:

  • A USB‑C wall adapter
  • A laptop or PC USB‑C port
  • A USB‑C power bank for extra portability

Just make sure the power source can deliver standard USB power.

How do I clean and maintain CoolJet?

Maintenance is simple:

  • Empty any remaining water after extended use.
  • Rinse the tank with clean water and let it air‑dry.
  • Wipe the exterior with a soft, slightly damp cloth.
  • Avoid harsh chemicals or submerging the unit.

Is CoolJet a good gift?

Definitely. CoolJet is a practical, thoughtful gift for anyone who struggles with heat — students in dorms, professionals in home offices, parents, seniors, or anyone without central AC.

I have more questions — how can I contact you?

Our support team is here to help. Use the contact form on our website or reply to your order confirmation email, and we’ll get back to you as soon as possible.

Buy CoolJet

Ready to skip the sweat and the sky‑high AC bills? Claim your CoolJet now and enjoy cool, fresh air wherever you need it.

Sale!

CoolJet (Official Retailer) 2026

Original price was: US$119.98.Current price is: US$57.75.