Is it OK to leave a diffuser on overnight?

Yes. Every Scentreat essential oil diffuser switches itself off: Ceramic and Wood when the water runs out, the Night Light automatically, and the CalmRide on a 1, 2 or 3-hour timer. Set it on a flat surface away from bedding and keep the room ventilated. More in our guide: Can you sleep with a diffuser on?

Shop by room

Essential Oil Diffusers for every room.

Q: Which essential oil diffuser is best for sleep?

The Ceramic Diffuser . It is lab-tested at 27.3 dB, quieter than a whisper. Its warm light dims or turns fully off, and it switches itself off when the water runs out. If you never want to refill, choose the Night Light Diffuser .

Quiet, warm and made to look like home. Every diffuser ships with free gifts: 3 oils and 6 eBooks.

3 diffusers

New Pillar Cold-Air Diffuser

Up to 1,076 sq ft
Cold air, no water
App timer + one touch

FREE

$119 in giftsOils & eBooks Shop now$169.95~~$339.90~~ →

Top rated 4.9 Night Light Diffuser

No water, runs on oil
Cordless, up to 40 h
Warm bedside light

FREE

$74 in gifts3 oils & eBooks Shop now$89.95~~$179.90~~ →

For the car 4.9 CalmRide Car Diffuser

Fits a car cup holder
Up to 60 h per charge
No water, pure oil

FREE

$74 in gifts3 oils & eBooks Shop now$79.95~~$159.90~~ →

🎁 Free gifts with every diffuser

Worth up to $119.89.

3 free oils and 6 eBooks with one diffuser. Buy 2 and get 6 oils.

Buy 1 diffuser

$44.97 value

3 Basic Scents oil set

$29.95 value

E.O Ebook Collection

Buy 2 · +3 more oils

$44.97 value

3 More Oils (6 in total)

Compare at a glance

Compare our essential oil diffusers.

Every Scentreat essential oil diffuser switches itself off. Ceramic, Wood and Night Light are lab-tested at 27.3 dB, quieter than a whisper; the CalmRide stays under 35 dB and the Pillar under 30 dB (manufacturer-tested). The real differences: room size, water or no water, and plug-in or battery.

Ceramic

Night Light

Wood

CalmRide

Pillar

Best for

BedroomNightstandLiving roomCarOpen rooms

How it works

Water + oilOil onlyWater + oilOil onlyCold-air oil

Runs for

10 h / tank40 h / bottle10 h / tank60 h / chargeApp schedule

Room size

320 sq ft430 sq ft375 sq ft215 sq ft1,076 sq ft

Power

Plug-inBatteryPlug-inBatteryPlug-in

Light

Dim or offNight light3 levelsNoneNone

Ceramic Diffuser

Handcrafted ceramic, our top pick for bedrooms and sleep.

Best for: Bedroom, desk · up to 320 sq ft
How it works: Water + a few drops of oil
Runs for: Up to 10 hours per tank of water
Power: Plug-in
Light: Warm light, dimmable or fully off

Shop →

Night Light Diffuser

No water to refill: a cordless diffuser and night light in one.

Best for: Bedroom, nightstand · up to 430 sq ft
How it works: Oil only, no water (water mode optional)
Runs for: Up to 40 hours on one oil bottle
Power: Rechargeable, USB-C
Light: Built-in warm night light

Shop →

Wood Diffuser

The biggest water tank in the range, for living rooms.

Best for: Living room, bedroom · up to 375 sq ft
How it works: Water + a few drops of oil
Runs for: Up to 10 hours per tank of water
Power: Plug-in
Light: 3 brightness levels or off

Shop →

CalmRide Car Diffuser

Cordless and cup-holder sized, made for the car.

Best for: Car, travel, desk · up to 215 sq ft
How it works: Oil only, no water
Runs for: Up to 60 hours per charge
Power: Rechargeable, USB-C
Light: None

Shop →

Pillar Cold-Air Diffuser

Pure oil as a dry, cold-air mist, made for big open rooms.

Best for: Open living rooms, kitchen-diners · up to 1,076 sq ft
How it works: Oil only, cold-air mist, no water
Runs for: On the schedule you set in the app · 100 ml bottle
Power: Plug-in, USB-C
Light: None

Shop →

★★★★★

“Quiet mist, natural ceramic design, and essential oils crafted for a daily home ritual.”

★★★★★

“Beautiful and so quiet. Perfect for winding down. Better than candles.”

★★★★★

“It looks gorgeous on my shelf and I can’t even hear it running.”

ONE FOR EVERY ROOM

Essential oil diffusers for every room.

Bedroom: Ceramic Diffuser: quiet mist, soft light, and it turns off when the water runs out.

Living room: Wood Diffuser: the biggest water tank (200 ml), up to 10 hours per fill.

Big open living room: Pillar Cold-Air Diffuser: pure oil, no water, up to 1,076 sq ft.

Nightstand, no refills: Night Light Diffuser: runs on an oil bottle, no water at all.

Car and travel: CalmRide Car Diffuser: cordless, up to 60 hours per charge.

Sage green convertible for the CalmRide portable diffuser

Car & travel

CalmRide Car Diffuser

Bedroom

Ceramic Diffuser

Small rooms

Night Light Diffuser

Living room

Wood Diffuser

Pair it with oils

Any 4 oils for $39.99.

36 pure single oils at $9.99 a bottle when you mix any four, with free shipping.

Build your oil set →

Free gifts up to $119.89

100-day money back

Free shipping over $39

Any 4 oils $39.99

Lab-tested whisper-quiet

FIND YOUR MATCH

Which essential oil diffuser should I buy?

Start with what matters most to you, and the right Scentreat essential oil diffuser follows.

Best for sleep: Ceramic Diffuser. Quiet, a warm light you can turn fully off, and it switches off by itself.

Best if you hate refilling: Night Light Diffuser. Runs up to 40 hours on one oil bottle.

Best for a living room: Wood Diffuser. The largest water tank in the range.

Best for a big open room: Pillar Cold-Air Diffuser. Pure oil, no water, up to 1,076 sq ft.

Best for the car: CalmRide Car Diffuser. Fits a cup holder and charges over USB-C.

Best for a desk: Ceramic Diffuser if it stays put; CalmRide if you move around.

Best as a gift: Ceramic Diffuser. Handcrafted ceramic that looks like décor, not a gadget.

BUYING GUIDE

How to choose an essential oil diffuser.

Six questions to ask before you buy an essential oil diffuser, in order of what makes the biggest difference.

01

Where will it live?

Bedroom, living room, nightstand or car. Choose for the room first; everything else follows.

02

Water or no water?

Water diffusers (Ceramic, Wood) turn water and a few drops of oil into a cool mist. Waterless ones (Night Light, CalmRide, Pillar) run straight from the oil bottle: nothing to fill, nothing to spill.

03

How long should it run?

Plug-in water diffusers run until the tank is empty: up to 10 hours, enough for a full night. Waterless ones run far longer: up to 40 hours on one bottle (Night Light) or 60 hours per charge (CalmRide). Pillar plugs in and runs on the timer you set in its app.

04

How quiet is it?

In a bedroom, noise matters most. Our Ceramic, Wood and Night Light diffusers are lab-tested quieter than a whisper, and the CalmRide stays under 35 dB.

05

Plug-in or battery?

Plug-in for a spot it never leaves. Battery if you want to move it between rooms or take it in the car.

06

Light and looks.

You will see it every day. Ceramic and Wood have a warm light you can turn fully off; the Night Light doubles as a bedside lamp.

Water or waterless

Ultrasonic vs waterless essential oil diffusers: which is better?

Neither is better everywhere. It depends on how you want to use it.

01

Ultrasonic (water) diffusers

Ultrasonic essential oil diffusers mix water with a few drops of oil into a cool mist that spreads through a room. A small bottle of oil lasts a long time; you refill the tank after each run. Ours: Ceramic Diffuser, Wood Diffuser.

02

Waterless diffusers

Waterless essential oil diffusers turn pure oil into a fine mist with no water at all. No tank to clean and a much longer run, but they use oil faster. Ours: Night Light Diffuser, CalmRide Car Diffuser, Pillar Cold-Air Diffuser. More in our guide: What is a waterless diffuser?

03

Our advice

For an evening routine in a bedroom or living room, choose ultrasonic. For no upkeep on a nightstand, a desk or in the car, choose waterless. For a large open living room, choose the Pillar.

Real ceramic

How to tell a real ceramic diffuser from a ceramic-look one.

Many “ceramic” essential oil diffusers are plastic with a ceramic-style finish. Three quick checks.

01

Read the material line

A real one says “ceramic” or “porcelain” cover. Be careful with “ceramic-look”, “ceramic-style” or “ceramic finish”, or with ABS or PP plastic listed as the outer shell.

02

Feel the weight

Ceramic is heavy for its size: our Ceramic Diffuser weighs 1.87 lb. A plastic shell the same size feels noticeably lighter.

03

Know what is inside

Every ultrasonic diffuser, ours included, has a plastic water tank (ours is BPA-free). The ceramic is the cover you see and touch, and that is what makes it look like décor. More in our guide: Are ceramic diffusers good for your home?

FAQ

Essential oil diffuser questions, answered.

The Ceramic Diffuser. It is lab-tested at 27.3 dB, quieter than a whisper. Its warm light dims or turns fully off, and it switches itself off when the water runs out. If you never want to refill, choose the Night Light Diffuser.

The Pillar Cold-Air Diffuser. It turns pure essential oil into a dry, cold-air mist with no water and is rated for open rooms up to 1,076 sq ft. For a smaller living room, the Wood Diffuser has the biggest water tank in the range.

The Ceramic Diffuser and Wood Diffuser plug in, so they run until the water runs out: up to 10 hours per tank on the on/off (intermittent) setting, or 4–5 hours of non-stop mist. The Night Light Diffuser runs up to 40 hours on one oil bottle, or 6–8 hours in water mode. The CalmRide Car Diffuser runs up to 60 hours per charge. The Pillar Cold-Air Diffuser plugs in and runs on the work-and-pause schedule you set in its app.

Yes. Every Scentreat essential oil diffuser switches itself off: Ceramic and Wood when the water runs out, the Night Light automatically, the CalmRide on a 1, 2 or 3-hour timer, and the Pillar on the timer you set in its app. Set it on a flat surface away from bedding and keep the room ventilated. More in our guide: Can you sleep with a diffuser on?

For a full tank, 8–12 drops in the Ceramic Diffuser and 9–13 in the Wood Diffuser give a medium scent. Use fewer for a lighter scent. The waterless diffusers need no drops: you attach the oil bottle. More in our guide: How many drops in a diffuser?

Yes. Every Scentreat essential oil diffuser comes with free oils: a 3-oil set (Lemon, Peppermint and Eucalyptus) with the Ceramic, Wood, Night Light and CalmRide, and a 6-oil starter set with the Pillar, and each one works with any of our 36 pure essential oils.

Every Scentreat diffuser has a 100-day money-back guarantee and a 1-year limited warranty.

About our cold air diffusers

These diffusers run straight from a bottle of pure essential oil, with no water tank and no heat, for a stronger scent. Pick the Pillar cold-air diffuser for large open rooms, the Night Light for a bedside table, or CalmRide for the car.

Find the right essential oil diffuser for your space.

One for every room and routine, each with free gifts (a 3-oil set and 6 eBooks, 6 oils when you buy 2) and a 100-day money-back guarantee. Every model runs on any 100% pure essential oil.

Shop the Ceramic Diffuser → Browse 100% pure essential oils