10 Best Oil Diffuser For Large Room of December 2025

• 3 in 1 FUNCTIONS: Aromatherapy Diffuser, Humidifier, Night Light. PLEASE clean it at least once a week.
• ADVANCED Ultrasonic Diffusing technology which produces vibrations at a frequency of 2.4 millions times per second breaks water and essential oils into extremely fine micro-particles without using heat (heat alters and destroys the properties of essential oils). ULTRASONIC diffusing feature ensures the integrity of the essential oils' beneficial molecular structure and allows for ease of healthy bodily absorption.
• Large 500ml water capacity that can continue use up to 10 hours each time. When time is up or there is no water, it will turn off automatically. Press the "Mist" button, choose the timer from 60 mins, 120 mins, 180 mins or ON.
• Provides many benefits e.g. help to lift your mood and relieve stress, cover the smell of pets or smoking, protect you family from excessively dry room and more!
• Can be used as a humidifier. Provides moisture for dry room & dry skin. 45 Days Money Back and 12 Months Warranty.

URPOWER

• HIGH CAPACITY, BEAUTIFUL DESIGN - The 400ml large water tank on our aromatherapy diffuser provides you with more than 13 hours of relaxing scent. Other aroma diffusers are only equipped with a 200ml or smaller container. The flower vase design comes in light or dark wood. It's small enough to fit anywhere you choose: home, office desk, bedroom nightstand, baby's room, bathroom, or yoga studio.
• 7 COLOR LED LIGHTS - Set the mood and lighting with your choice of 7 distinct colors. You can also choose to set your ultrasonic diffuser machine to carousel mode for a flowing rainbow of colors or turn the lights off for total darkness. With numerous options, our device provides you the opportunity to create the ultimate aromatherapy experience.
• A THERAPEUTIC VESSEL - Our powerful diffuser disperses therapeutic essential oils throughout the air, providing you with a pleasant fragrance throughout the house, office, or yoga studio. Pair our air diffuser with specific essential oils to benefit from proven health perks. Oil diffusers improve sleep quality, reduce anxiety, balance hormones, and improve skin health.
• 4 TIMER OPTIONS, VARIABLE MIST OUTPUT, AUTO SHUT OFF - Select from 1 hour, 3 hours, 6 hours, or continuous timer options. Tailor your cool mist aromatherapy diffuser's output to your liking by setting it on high (50ml/hr) or low (30ml/hr). Our scent diffuser allows you to customize your fragrance experience. And with the auto shut off function, we ensure your electric diffuser stops when the water level is low.
• ETL CERTIFIED - We took extreme care when designing our oil diffuser, and back it up by meeting the highest safety standards. The power cord and all electrical components are ETL certified by Intertek to ensure quality, safety, and reliability. Don't go with a competitor that uses inferior parts, go with the diffuser certified to last.

Everlasting Comfort

• GREAT GIFT IDEA FOR EVERYONE: This set of essential oil diffuser with oils is a thoughtful and practical gift that people will actually use. Their strong appealing fragrance and nice package are appropriate for any holiday or special event,such as birthday, holiday, anniversary, Mother's Day or just to say thank you to anyone.
• POWERFUL MIST OUTPUT AND COMPACT SIZE: Upgraded version that can generate much more mist and last longer without taking much space in your room. An ideal way to increase humidity (moisture) in a single room.
• 7 COLORS & PP MATERIAL: Choose between 7 colors that can be set to cycle through or on one specific color. Put it in the room as a nightlight to help get a restful sleep. This diffuser adopts PP material with wood grain, which adds a sense of natural grace to your room.
• WATERLESS AUTO OFF: Our essential oil diffuser with oils has 3 working modes, intermittent/continuous mist/off. Continuous mode lasts 5-6 hours, intermittent mode lasts up to 9-10 hours. Once the water runs out, the diffuser will automatically shut off.
• NATIVE SOURCED, BOTTLED IN THE USA, 100% PURE: 6 scents include tea tree, lavender, eucalyptus, lemongrass, peppermint and sweet orange, which are extracted from native plants from multiple countries. With premium quality, each drop is 100% pure with no additives, fillers, bases or carriers added.

InnoGear

• MULTIFUNCTIONAL AROMATHERAPY DEVICE WITH REMOTE: This essential oil diffuser is an amazing aromatherapy device unlike any other you've ever used. It features a large and easy to clean 600 ML water tank, 7 different LED light colors, multiple mist modes, as well as a safety auto-switch that prevents it from overheating in case it runs out of water.
• HUMIDIFIER MADE WITH PREMIUM QUALITY MATERIALS: Besides its uses in aromatherapy, this essential oil diffuser also functions as a humidifier. Use it to improve your home's air and atmosphere quality, cover the smell of pets or smoking, and protect you family from excessively dry air, microorganisms, allergens, dust, and more!
• HUGE CAPACITY CAN RUN OVERNIGHT AND LONGER: Unlike the standard size humidifiers, this has a extra large capacity and can run all night.
• TIMER OPTIONS, REMOTE, VARIABLE HIGH OR LOW MIST OUTPUT, AUTO SHUT OFF - Select from 1 hour, 3 hours, 6 hours or continuous timer options. Tailor the cool mist aromatherapy diffuser output to your choice of high or low. Unit is equipped with a safety auto shut off when low water level is detected.
• A GREAT GIFT IDEA FOR EVERYONE: If you're in the market for a nice and practical gift, you can stop looking. This great aromatherapy essential oil diffuser is a thoughtful and handy present, one that everyone can benefit from. With a combination of style, size ,design and function like that, it's a guaranteed thoughtful gift!.

BlueHills

• 8 COLOR ATMOSPHERE LIGHTS: Fully Light transmission plastic design lets the color looks wonderful and provide you a romantic atmosphere. Homeys Essential oil diffuser has 8 color-changing lights, you can fix a single color as you like.
• 500ML DIFFUSER, IDEAL FOR LARGE ROOM. Homeys 500ml essential oil humidifier atomizer plate oscillates 3, 000, 000 times offering fine cool mists and long-lasting fragrance. The covering area reaches up to 480 ft², which can use in a large room. It continuously works with 8-11h in high mist and 12-20h in a low mist (sleep mode). The three-time setting for option: 1/3/6H timer.
• LOW NOISE & SLEEP MODE. Thanks to the exclusive noise-reducing technology, the noises of bubble and fan are effectively reduced and controlled around 23dB within 1 meter, creating a perfect sleeping atmosphere. Press the “SLEEP” mode button, then the essential oil diffuser will turn to “sleep” with the light off and low mist output(25-40ml/h).
• 3-IN1 ESSENTIAL OIL DIFFUSER. Homeys oil diffuser can be used as an Aroma Diffuser, Humidifier or a Night Light. Homeys essential oil diffuser will improve the quality of air in your bedroom, office, and baby room. The fragrance will relax your mind when you are sleep or work and protect your family from dry or dust air.
• HEALTHY MATERIAL & AUTO OFF. Our oil diffuser Made of BPA-free material which is 100% healthy for babies. At the same time, Homeys diffuser will automatically shut off when it runs out of water.

Homasy

• Long Operation Time---This essential oil diffuser runs 12-18 hours with 2 mist settings
• Luxury Decorations ---Natural finest wood look design, warm soothing yellow light, a perfect match to your home or office decor; Set a positive vibe for business meeting and social gatherings
• Mood Elevating---Work with your essential oils to help you get moving on a slow morning; Ambient dim light at the bottom for smooth and friendly daytime and nighttime use
• Easy & Safe---Simple operation; Auto shut off when water runs low; No heat involved a safer alternative to candles or burner to reap the benefits of aromatherapy
• Guaranty Service--- manufacturer with 14 years of experience specialized in the field of diffusers for essential oils and humidifiers; Your maximum satisfaction is guaranteed by our excellent service team; if you don’t satisfy your purchase, just come to us and we will give you a refund or replacement; No question asked

Aromacare

• COMPACT SIZE FOR SPACE-SAVING: Without occupying much space, you can easily place this palm sized diffuser on your desk, countertop, or pack in carry-on while on the go.
• 2 MISTING MODES: You can set it to intermittent mist (6-8 hrs working time) that diffuser mists and pauses every 30s, it goes for almost the whole night; Or set it to continuous mist (3-4 hrs working time) that keep misting until water runs out, it creates an instant fragrance in your room.
• PP MATERIAL AND COOL MIST: Using PP material, this diffuser disperses a comfortable stream of room-temperature mist, which provides ideal coverage for small or medium sized room.
• COLORFUL MOOD LIGHT: InnoGear essential oil diffuser has 8 soothing colors, light can switch from dim to bright. Great for creating atmosphere, meditation, or using as a night light.
• WATERLESS AUTO-OFF: You can enjoy a restful sleep and keep this diffuser on at night without worrying about overheating. The diffuser will automatically shut off once the water runs out.

InnoGear

• PATENT-PENDING OIL FLOW SYSTEM: Propriety Singlefill technology delivers 12 hrs of everlasting scent from a single fill (1.5ml / 30-40 drops) up to 15 hrs in low mode, up to 10 hrs in high mode
• Beautifully Quiet: Ultrasonic technology gently emits therapeutic mist below 30dB so as not to disturb your sleep, study, work or relaxation
• Waterless Auto Shut-Off: Instinctively powers off in 5 seconds when the tank is empty; 3 convenient auto-off timer settings (1hr/4hrs/8hrs)
• Miracle Soothing Mist: Adapt the mist output according to your needs, add an enveloping vapor to purify and humidify any space
• One-of-a-Kind Gift: Express your love with Anjou’s home-enriching diffuser, stunning piece of décor is covered under a one year warranty; collapsible refilling cup included

Anjou

• 550ML CAPACITY, RUN OVER 10 HOURS, MORE MIST OUTPUT: Our essential oil diffuser feature 550ml capacity, even in strong mist mode still work for 9-10 hours, and weak mist runs for 10-12 hours, works well disseminating the aroma steam to your room. You can use this as an aroma diffuser and personal humidifier, ideal for apartments, office, studio, child’s room. This is real, rather than other brands claims 300ml capacity run for 10 hours.(VAPOR AMOUNT: 55ml/h VS 30ml/h)
• TIMER SETTING AND MIST CONTROL，WATERLESS AUTO-OFF: You can change the lights to whatever you feel at the moment, constant color or rotation of 7 colors, each light has bright and dim modes. Timer set in 1H/3H/6H/continuous on. When time is up or there is no water, the cool mist humidifier will turn off automatically, no risk of burns.
• REDUCE ALLERGIES SYMPTOMS IN WINTER DRY CLIMATE: This aromatherapy diffuser could provide a large amount of fresh air for those who suffer from Dry Cough, Itchy Nose or Eyes, Allergies Sinus Headaches, and Sleeping Problems, Dry Skin. Helps to improve breathing and sleeping, relieve allergy, reduce static electricity shocks in the dry climate. Add to cart now, great housewarming or hostess gift idea for yourself, parents, friends, business partners.
• ADVANCED ULTRASONIC DIFFUSING TECHNOLOGY, SUPER QUIET: Ultrasonic diffusers generate the vapor without any heat, which best preserves the integrity of the essential oil. Diffusers are better than any scented candle, you can even combine two or more essential oils to create a unique blend. The tiny bit of white noise you barely notice it, which may help you relax and sleep better but not obnoxious at all.
• SLEEK and ELEGANT LOOKING, LIFETIME CUSTOMER SERVICE: The aromatherapy essential oil diffuser is made of plastic with a faux wood look, BPA-Free water tank, fine design, and good quality, it blends naturally with the most home decor. We provide you 12-month replacement or refund if you are not satisfied.

BZseed

• Best Gift 5-IN-1 AROMATHERAPY DEVICE: This ultrasonic essential oil diffuser is an amazing multifunction aromatherapy device unlike any other you've ever used. It features a large and easy to clean 700ml water tank, multiple mist diffuse modes, as well as a safety auto-switch that prevents it from overheating in case it runs out of water.
• GREATLY IMPROVES LIVING SPACE: Besides its uses in aromatherapy, this essential oil diffuser also functions as a humidifier. Use it to improve your home's atmosphere quality, cover the smell of pets or smoking, and protect you family from excessively dry air, static electricity and more!
• PREMIUM QUALITY MATERIALS: When it comes to our premium essential oil diffusers, we make a point of using nothing but the same ultra-high grade, safe, and eco-friendly PP materials baby bottles are made from, as well as state-of-the-art production processes and strict quality control.
• A GREAT GIFT IDEA FOR EVERYONE: If you're in the market for a nice and practical gift, you can stop looking. This great aromatherapy essential oil diffuser is a thoughtful and handy present, one that everyone can benefit from. With a combination of style, design and function like that!
• 100% RISK FREE PURCHASE: At ASAKUKI, we have great faith in our essential oil diffusers. After all, we use them in our homes ourselves! Each one of them comes with a 1-year technical support. If you have any issue with your diffuser, do not hesitate to contact us - your satisfaction is paramount!

ASAKUKI