BedJet 3 – a climate fan that blows warm or cool air into your bed

By Ricardo de Jong ·

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Woman sitting on a white bed with a BedJet 3 unit at the foot of the bed, its hose running under the covers

Getting into a cold bed in January is a small act of bravery. You lie there, curled up like a shrimp, waiting for your own body heat to fill the sheets. Then at 3 a.m. you’re too hot and one leg goes out from under the covers.

The BedJet 3 fixes both ends of that night. It’s a small box that sits under your bed and blows warm or cool air through a hose straight into your sheets.

A hair dryer for your duvet, basically. I mean that as a compliment.

White BedJet 3 base unit next to its color-screen remote and the BedJet phone app

What is the BedJet 3?

The BedJet is a climate fan for beds. The base unit is 15.5 by 10.5 by 5.75 inches, so it slides under most bed frames (BedJet asks for 6 inches of clearance) or sits next to the bed. A 4-foot hose runs from the unit to a nozzle between your sheets, held in place by a bracket.

It was invented by Mark Aramli, who started his career on NASA spacesuits, working on heating and cooling for astronauts. He was a hot sleeper and built the first prototype on his kitchen table. He pitched it on Shark Tank in 2015 and every Shark passed. Kevin O’Leary told him he’d never sell it. BedJet now says it has sold over 350,000 units. Awkward.

How does it work?

In heat mode it pushes warm air under the covers. BedJet says it warms the bed to “just out of the dryer” in seconds, and the Amazon listing claims that’s 15 times faster than an electric blanket. There’s also a Turbo mode for a 10-minute blast.

Cool mode is a fan. It moves room air through the bed to carry away body heat and sweat. BedJet says it works best in bedrooms below 79°F, so it won’t save you in a hot room without AC.

The thermostat runs from 66°F to 109°F, and you set it by the degree on a color-screen remote or in a Bluetooth app. The clever bit is the biorhythm mode: you program a different temperature for every hour of the night. Warm when you get in, cooler in the deep-sleep hours, a bit warmer to wake you up. It can even use temperature as your alarm.

The good and the not-so-good

The good:

  • Warm sheets on demand, without an electric blanket’s wires inside your bedding.
  • Heating and cooling in one box, set per degree and per hour.
  • The Amazon listing averages 4.4 out of 5 from over 2,600 ratings at the time of writing.
  • BedJet offers a 60-day sleep trial and a 2-year warranty when you buy direct.

The not-so-good:

  • It’s pricey for a fan, about 500 bucks on Amazon at the time of writing.
  • The cooling is airflow, not AC. Hot rooms stay hot.
  • BedJet sells a Cloud Sheet that spreads the air through the bed, but it’s not in the box. That’s another 139 bucks and up.
  • It’s a fan, so it makes some noise. The Amazon listing says 30 to 46 dB.

Who is the BedJet 3 for?

Hot sleepers, people with night sweats or hot flashes, and anyone who dreads the cold-sheet moment all winter. If one of you freezes while the other one sweats, BedJet also sells a dual-zone version with two settings in one bed.

If you only want a warm bed and don’t care about cooling, a regular heated mattress pad is much cheaper. And for more ideas for better nights, see our favorite sleep gadgets or the Somnox sleep robot you’re supposed to cuddle.

Where can I buy the BedJet 3?

Amazon US sells the single-zone BedJet 3, which works on any bed size. It was about 500 bucks at the time of writing (October 2026). The Cloud Sheet is sold separately.

Warm sheets in seconds and a NASA backstory. Take my money!