WD Aroma — aroma diffuser wholesale supplier in China
Wholesale aroma diffusers
& small-batch ODM, concept to delivery
41 selected waterless nebulizing, UHF and ultrasonic aroma diffuser wholesale models for floor areas from 27 m² to 2,133 m² (287–22,963 ft²), plus 800+ fragrance and essential oils. Additionally, private label starts from one carton with free laser engraving.
Above all, our signature service is small-batch ODM: bring an idea or a reference product and one team takes it through design, 3D prototype, tooling and a short first production run — all the way to a small-batch delivery. As a result, you launch your own shape without a large upfront order or heavy inventory; therefore the cost of testing a new product stays low.
Wholesale diffuser catalogue
Find your aroma diffuser wholesale model by room size
Filter our waterless nebulizing and UHF diffusers by floor area in m², tank capacity, atomizing technology and placement. Matching aroma diffuser wholesale models update on the right without a page reload, so buyers can shortlist specs before requesting a quote. However, ultrasonic units are filtered by tank capacity, since their coverage depends on room conditions.
How it works
Three atomizing technologies,
matched to the space and the oil
Indeed, we do not push one technology for every space. Each method has a different particle size, noise level and coverage range, so the right choice depends on the room, the oil type and the daily operating hours. Then tap a technology for the matching catalogue.
Cold-air nebulizing (waterless)
32 models · 187.5–8 000 m³ / 6 622–282 517 ft³
Basically, a compressed-air pump pulls pure essential oil through a narrow jet and atomizes it into a dry nano-mist with no water, no heat and no dilution. The particles stay airborne longer than ultrasonic mist, so the same oil volume covers a larger floor area. Also, the same technology powers portable, desktop, wall-mounted and HVAC duct-connected units for retail, hotel and whole-building projects.
• No wet residue • Longest air retention • Scales to HVAC Browse range →
UHF 647 nm
2 models · 100–500 m³ / 3 531–17 657 ft³
For instance, ultra-high-frequency piezoelectric oscillation above 3 MHz breaks oil into atomized particles around 647 nm without heating it. Furthermore, both UHF models run below 15 dB, near the threshold of hearing, and the pocket UD11 travels without leaking. Lastly, the technology is covered by Chinese invention patent CN117019500A.
• Below 15 dB • Dry nano-mist • Patented Browse range →
Ultrasonic (water + oil)
7 selected models · 120–500 ml / 4.06–16.91 fl oz tanks
Similarly, a ceramic disc vibrates at ultrasonic frequency through a water and oil mix, producing a visible mist that carries fragrance and slightly raises humidity. Also, the units accept both water-soluble fragrance oils and pure essential oils, cost less per unit, and suit home, bedroom and desktop use.
• Water-soluble & pure oils • Visible mist • Lower cost Browse range →
Technology spotlight
647 nm UHF atomization.
15 decibels. Patented.
How it works
Generally, standard ultrasonic diffusers vibrate below 2.4 MHz and produce visible water mist. By contrast, our UHF line oscillates above 3 MHz and atomizes oil into particles around 647 nm. As a result, a dry, invisible nano-mist stays suspended 3–5× longer in the air than ordinary mist.
- 15 dB — near the threshold of hearing
- Dry nano-mist, no wet residue on surfaces
- Chinese invention patent CN117019500A
- 100–500 m³ / 3 531–17 657 ft³ coverage
- 5–15 ml / 0.17–0.51 fl oz oil capacity
- CE, FCC, RoHS certified
Two models in the range
100 m³ / 3 531 ft³ · 26.7 m² / 287 ft²
5 ml / 0.17 fl oz · 950 mAh · PA6 + aluminum
Leak-proof in a pocket or bag · Blue / Gold / Rose Gold / Silver
500 m³ / 17 657 ft³ · 133.3 m² / 1 435 ft²
15 ml / 0.51 fl oz · 2 500 mAh · noise report included
Grey / White · ABS + PA6
Customization
OEM or ODM — clear thresholds,
no surprise costs
Indeed, small-batch ODM is our signature service: we take a concept or reference product through design, prototype and a short first run, so you test your own product without a large order or heavy inventory. For this reason, the two questions buyers ask first — how many units and what tooling cost — are answered up front so you can budget before contacting us.
| What matters | OEM — our mold, your brand | ODM — your own design |
|---|---|---|
| You supply | Logo, colour, packaging | A brief or a concept sketch |
| We supply | Existing mold plus 7 printing methods | Design, engineering, tooling, pilot run |
| MOQ | From 1 carton (qty per carton varies by model) | 300–1 000 pcs (ceramic & reed from 300) |
| Logo cost | Laser engraving is free | Included in the project |
| Mold cost | $0 | $0 on the CNC shell; internal plastic mounts for the pump, board and battery need injection moulds, about $3,000 per set |
| Design fee | $0 | From $100 for ceramic / reed projects; electric-diffuser design from $1,500 |
| Lead time | Logo under 7 days; colour & packaging 7–30 days | 90–180 days |
| Design IP | Shared catalogue models stay ours | Yours, with NDA and exclusivity |
| Best for | Market tests, DTC brands, small batches | Brands building a real moat |
Why mold cost can start at zero
Full CNC machining — $0 tooling
Firstly, we sometimes machine the shell directly from billet. Therefore you skip tooling entirely. Also, this route fits short runs and metal bodies, and it removes the largest upfront cost from your budget.
Small edits to a proven mold
Secondly, we more often modify an existing mold. For example, we change a top cap, a button position, or a bottle thread. Because the base tool already exists, the cost stays low and the schedule stays short.
Brand-new multi-piece plastic tool
Thirdly, a ground-up plastic housing needs a full mold set, quoted per project after drawings are approved. Then, in return, you own a shape nobody else can buy. However, for a first project we usually recommend Route 2 — less risk, faster return.
Reference fees by product type
Overall, the figures below are references, not fixed prices. Rather, each project is quoted after we review your drawings, photos or reference product. Also, 3D sampling runs at least two sets — one kept on file, one sent to you.
| Product type | Design fee | 3D / sampling | Mould fee | Typical lead time |
|---|---|---|---|---|
| CNC metal waterless diffuser | $1,500–3,000 | $100+ / set | 2 injection moulds, about $6,000 | About 6 months to bulk |
| Electric diffuser prototype, no circuit design | $1,500 | $100+ / set | — | About 1 month |
| Electric diffuser prototype, with PCB | $1,500 | $100+ / set | — | About 1 month |
| Injection-moulded plastic diffuser | $1,500 | $100+ / set | 3 injection moulds, about $9,000 | About 6 months to bulk |
| Ceramic-shell waterless diffuser | $1,500 | $100+ / set | 3 injection moulds, about $9,000 | About 6 months to bulk |
| Ceramic reed diffuser | $0+ | $100+ / set | Included in sampling | Sampling 15 days; bulk about 3 months |
| Resin / stone-effect reed diffuser | $1,000 | $164+ for 3 sets per round | Included in sampling | Sampling 15 days; bulk about 3 months |
| Ultrasonic / micro-pore atomizer diffuser | $1,500 | $100+ / set | 2 injection moulds, about $6,000 | About 6 months to bulk |
| Additional services | Reference fee | Includes |
|---|---|---|
| Custom fragrance oil | $100 / scent | Sample with courier shipping; about 15 days |
| Designer-inspired match | $148 / scent | Sample with courier shipping; about 15 days |
| Circuit / PCB design | About $450 | Circuit design and a board sample |
| Laser logo | $0 | First sample free; volume logo quoted separately |
What you get
Seven customization levers,
from logo only to full ODM
Importantly, you do not need a full ODM build to get a branded product. In fact, most buyers start with a logo or packaging change and scale up from there. Choose the level that fits your order size, then add the next tier when you are ready.
Laser engraving
From 1 carton · laser free, first sample free
Logo printing
Small minimum · 7 methods
Gift-box packaging
No MOQ · kraft / colour / blister, design free
Fragrance custom
5 L · 3–7 day samples
Colour & material
500–1 000 pcs
Smart functions
1 000 pcs · WiFi / APP / voice
Full ODM shape & engineering
300–1 000 pcs · 3–6 months · $0 tooling on CNC routes
Service that does not disappear after the order
Beyond the product itself, we handle the paperwork, the QC, and the communication so you do not have to chase a sales rep for updates. Specifically, here is what we include with every order.
Same-day reply on working days
Generally, quotes, spec sheets, and photos arrive within one business day.
Free factory video inspection
Additionally, we walk the production line live over video call.
QC photos before every shipment
Furthermore, we send finished-unit photos before anything leaves the factory.
OEM & ODM documentation
Lastly, BOM, spec sheets, compliance files, and testing reports are included.
How we build
Five steps, 90–180 days
from sketch to mass production
Every custom build follows the same five steps: design and quote, prototype, your testing round, tooling with a pilot run, then mass production. Logo and colour changes ship in 7–30 days; a full ODM build runs 90–180 days, because it includes one to three mold-test cycles before the pilot run is approved.
Design & brief
7–15 days
First, we review your sketch, reference photos, and target price. Then our engineer sends 3D renders and a BOM with line-item costs.
3D prototype
7–15 days
Next, we print or CNC a physical sample so you can test feel, fit, and function before any tooling money is spent.
Customer testing
15–60 days
Then, you test the prototype in your space. On a full ODM build steps 02–03 usually repeat 1–3 times before sign-off.
Tooling & pilot run
30–45 days
Then, once you approve, we cut the mold and produce a 50–100 unit pilot run to validate every assembly step.
Mass production
30–45 days
Finally, full production runs with aging tests and QC photos before shipment. Also, we record a video of every production batch.
Case studies
Real projects, real numbers
In short, four buyers, four different problems. We keep client names private, but we publish the specification, the engineering work, and the commercial terms — because those details tell you far more than a logo wall.
A European founder built a ceramic reed diffuser in 37 days
What they asked for
The founder wanted a hand-sculpted ceramic body rather than a plain vessel. For example, they supplied an exact glaze colour code, an engraved logo, and a 250 ml / 8.45 fl oz fill. We had never built a reed diffuser before, so we said that in writing on day one, before taking any money.
What we did
First, a sculptor carved the shape and the mould shop cut the mould. The colourist mixed the glaze slurry to a 28–32 degree concentration window, because dark tones wash out below it. Then, our perfumer built the scent and supplied the IFRA and MSDS documents. Finally, the mould was re-cut twice to bring internal capacity out to the 300 ml / 10.14 fl oz target — deposit to shipped samples took 37 days.
Read the full 37-day project log →
A Portuguese startup cut tooling from $24 000 to $5 000
What they asked for
Specifically, the client wanted a stone-texture ceramic waterless diffuser with a minimalist shell, hidden buttons, a hidden charging port, warm amber light, and a moulded-in embossed logo. However, their first order sat at only 300 to 500 units, and most factories start ceramic tooling at 1 000.
What we did
Instead, our modular platform carried most of the structure, so mould count dropped from five sets to two and tooling fell from $24 000 to $5 000. Additionally, we upgraded the pump from the 370 model to the 095 model, which lifts air output from 1.5 L/min to 3.0 L/min and service life from 2 000 h to 8 000 h.
Read the full project case →
A wellness brand added a diffuser to an existing range
What they asked for
Specifically, they wanted a waterless nebulizing unit with a 10 ml / 0.34 fl oz direct-screw glass bottle, USB-C charging, a very quiet pump, one button with three states, and a 2-hour auto-off. Above all, they needed a small first run, because the diffuser was a line extension rather than a core product.
What we did
First, we matched the brief to our 24-series aluminium bodies, which take 5–20 ml / 0.17–0.68 fl oz bottles, and offered a lower-cost plastic option for their price tier. Additionally, we proposed our UHF line, because it runs at 15 dB and resists leaks.
See more case studies →
An audio brand entered scent with a full ODM build
What they asked for
Specifically, they needed a waterless cold-mist unit, a replaceable glass oil bottle, a leak-proof mechanical bottle lock, quiet adjustable output, and aluminium plus carbon-fibre surfaces. In other words, they wanted an object that matched their existing hardware design language.
What we did
First, we proposed 647 nm UHF atomization, covered by invention patent CN117019500A. Next, our engineers 3D printed and iterated the bottle-lock interface, because a printed master lets you verify fit before anyone cuts a mould.
See the OEM / ODM process →Fragrance & essential oils
800+ oils.
One sourcing partner.
From pure single essential oils to designer-inspired perfume oils, hotel-collection scents and food-grade flavours, the live catalogue carries 800+ oil SKUs. Also, you can source diffuser hardware and fragrance from the same team, and every oil order comes with the compliance documents your market needs.
Floral & fruity fragrance oils
For example, lavender, rose, jasmine and citrus blends — our largest fragrance category, suitable for cold-air and ultrasonic diffusers alike.
Browse the collection →Designer-inspired perfume oils
Namely, inspired-by versions of well-known luxury-house fragrances, ready for bulk and private label.
Hotel collection scents
For instance, signature lobby scents are used with commercial HVAC and large-space scent systems.
Pure essential oils
Also, single-origin essentials include peppermint, eucalyptus, tea tree and lavender, with COA.
Carrier & base oils
Likewise, jojoba, argan, fractionated coconut and sweet almond — cold-pressed, for body care and blends.
Hydrosols & plant extracts
Similarly, floral waters and botanical extracts come from steam distillation of real plant material.
Food-grade flavours
Finally, vanilla, strawberry, coffee and other food-safe flavour oils serve bakery, confectionery and drinks.
Your fragrance, your formula, your label
For example, develop a custom scent with our perfumer, or white-label an existing catalogue fragrance. Then, we handle formulation, IFRA compliance and packaging under your brand. Custom fragrances start at 5 litres / 1.32 gal (some premium scents from 25 L), so you can test the market before scaling.
- Custom fragrance MOQ from 5 L / 1.32 gal (25 L for premium)
- Scent sample in 3–7 working days
- IFRA, SDS/MSDS and COA documentation
- Bottle sizes from 5 ml to 5 000 ml / 0.17–169 fl oz
- Private-label design — your logo, your box
- Water-soluble oils for ultrasonic units and pure oils for nebulizing units
Learn before you buy
Guides, market data, and tutorials
Generally, our guides cover aroma diffuser margins, atomizing technology comparisons, and sourcing from China. If you are building a brand, start with the margin-compression analysis, then move to the buying guides and technology explainers.
Where have all the profits gone? The great margin squeeze in aromatherapy diffusers
- Why factory profit per order is down one third — and why brands have lost at least half of theirs
- Where the margin went: raw materials +10%, core components +15%, ad costs +20%
- Five breakout strategies — premium design, waterless technology, niche products, bundling, patent moats
- Why you should not source everything from one factory — and how to diversify the risk
The death of the air freshener: how EVs force a car scent revolution
In short, the guide explains why EV cabin air quality is rewriting the car fragrance category, and what products will win.
Buyer guideTop 5 commercial essential oil diffusers for wholesale
Next, compare coverage, tank size, and noise for the best-selling commercial units.
TutorialHow to wholesale aroma diffusers from China: a step-by-step guide
From first sample to container load — payment terms, QC, and shipping.
Deep diveWaterless essential oil diffusers: complete technology guide
Specifically, cold-air vs UHF vs nebulizing — particle size, noise, and which space each fits.
MarketMore market trend analyses
For example, industry sizing, channel shifts, and emerging product categories.
TutorialsAll buying & sourcing tutorials
From MOQ negotiation to quality inspection checklists.
Wholesale FAQ
Answers before you ask
First, the 19 questions wholesale buyers ask most often, grouped by topic. Prices and thresholds below come from our current price list; anything project-specific is marked on request.
MOQ, samples & pricing
What is the MOQ for standard and private-label orders?
Basically, catalogue models with a laser-engraved logo start from one carton — the piece count per carton varies by model. A single sample unit can also be made with your logo. Full ODM production with a custom mould normally starts at 1,000 pieces, depending on the product line; if a higher unit price works for your launch plan, the MOQ can be lowered to 300 pieces — tell us your target quantity and we will quote it.
Can I order a sample before buying in bulk, and what does it cost?
Yes. Generally, sample units are charged at the sample unit price plus courier shipping; the first laser-engraved logo sample itself is free. Freight cost and transit time differ by product and destination, so send your delivery address and our team will confirm the exact shipping charge and lead time on the proforma invoice.
Do wholesale prices come down as quantity increases?
Yes, every model has stepped EXW pricing (2–99 / 100–999 / 1,000–4,999 / 5,000+ pieces). Also, smart-control add-ons are priced separately: Bluetooth APP control adds US$1.5 per unit, and the combined WiFi + Bluetooth module adds US$3 per unit. Finally, ask for the current aroma diffuser wholesale price list with your target models and quantities.
Is laser engraving really free, and what other logo methods exist?
Laser engraving is free, including the first sample. Also, other processes — silk screen, hot stamping, inkjet, UV printing, heat transfer and stickers — are quoted by method and surface material, with small minimums. Send your logo as a vector file (AI or PDF) and we will confirm the engraving area and placement.
Lead time, shipping & payment
How long is bulk production lead time?
Currently, in-stock catalogue models with logo only normally ship in 3–7 days. However, colour or packaging customization takes 7–30 days. A minor ODM project — small edits to an existing model such as the colour, switching a button to touch control, or changing the nozzle shape — starts at around 90 days, because the prototype usually goes through review and revision with you and is rarely perfect on the first sample. A full ODM project with complex tooling runs 90–180 days.
How do you ship, and how long does delivery to my country take?
For example, courier express (DHL/FedEx/UPS) takes about 7–15 days, and sea freight takes about 30–45 days to major ports. Also, we ship worldwide and can work with your nominated freight forwarder. Shipping a battery-equipped diffuser requires a whole-unit sea or air transport report rather than a separate battery document; alternatively, shipping through a DDP channel does not require this report.
What payment methods and terms do you accept?
Standard terms are 30% deposit and 70% balance before shipment. We accept T/T bank transfer and PayPal; sample orders can be paid by PayPal against a proforma invoice. Custom tooling fees are paid separately and upfront.
Choosing a model & specifications
Which diffuser fits my space?
First, use the finder above and start with floor area: pocket units cover up to 30 m² (323 ft²), portable desk models 50–80 m² (538–861 ft²), office and retail models 100–135 m² (1,076–1,453 ft²), lobby models 160–400 m² (1,722–4,306 ft²), and HVAC-connected units cover 533 m² (5,740 ft²) and above. Partitioned rooms, high ceilings and strong ventilation may require more than one unit.
How do you calculate coverage area in square metres?
Rated diffusion volume (m³) is divided by a 3.75 m / 12.3 ft ceiling height, the standard in our specification sheet. A 500 m³ / 17,657 ft³ unit therefore covers about 133 m² / 1,435 ft². Effective area changes proportionally with lower or higher ceilings, and every card shows both m²/ft² and m³/ft³.
What is the difference between cold-air nebulizing and ultrasonic diffusers?
Firstly, cold-air nebulizing units use compressed air to turn pure essential oil into a dry nano-mist — no water, no heat, no dilution, no wet residue. The same technology is built across small pocket, car and home models as well as large commercial and HVAC-connected units, and the bigger models cover far more space than an ultrasonic unit. In contrast, ultrasonic units vibrate a mixture of water and oil to produce a visible mist that also humidifies; they cost less per unit and are aimed at home, bedroom and desktop use. Ultrasonic coverage varies with room conditions, so we list it on request.
Sound, battery & smart control
How loud are the machines?
The UHF series (both models) runs below 15 dB, the portable 24xx family and desktop 25xx family run at or below 36 dB, and commercial wall-mounted and HVAC models run at or below 38 dB. For comparison, a quiet library is around 40 dB. Exact dB figures are on every product specification table.
Do you offer battery models, and how long does a charge last?
Yes. Portable units charge over Type-C with built-in batteries: the 24xx family uses a 2,000 mAh cell (about 70 hours on the 10-second intermittent setting), desktop models such as the 2520 use 4,000 mAh for up to about two weeks of normal use, and larger builds such as the A6000 and M202B use 8,000 mAh cells. However, runtime always depends on the spray interval and oil viscosity.
Do the diffusers support APP, WiFi or Bluetooth control and timers?
Many commercial models include Bluetooth or WiFi APP control, and most portable models offer built-in timers (for example 1/2/3/8 h, or 1/3/6/12 h). Bluetooth APP control can be added for US$1.5 per unit and the combined WiFi + Bluetooth module for US$3 per unit. Multi-unit group scheduling runs through the same app; ask us for the current smart-model list.
Customization & packaging
Do you offer OEM, white-label or private-label service?
Yes. Generally, catalogue-model private labeling starts from one carton with free laser logo; custom Pantone colours from 500 pieces; full custom-shape ODM with design drawings, 3D prototypes and moulds starts at around 300 pieces. Retail boxes (heaven-and-earth, airplane, magnetic closure) with EVA or pearl-cotton inserts and printed manuals can be custom branded, and blank unbranded boxes are available for self-labeling.
How much does custom design and tooling cost?
Rather, every project is quoted only after we review your drawings, photos or reference product, so treat these as references. Electric-diffuser design starts around US$1,500 plus US$100+ per 3D-sample set (at least two sets); add about US$450 for circuit design. The CNC metal shell needs no mould, though internal plastic mounts for the pump, board and battery use injection moulds at about US$3,000 each. For example, ceramic reed projects start around US$100 and resin stone-effect reed projects around US$1,000 plus US$164 per sampling round. See the full fees-by-product-type table in the Customization section above. Fees refundable from a large order are always stated on the formal quote.
Oils: compatibility & documentation
Can I use my own or third-party fragrance oil?
Generally, cold-air and UHF units atomize pure essential or fragrance oil directly, so any pure oil within the pump’s viscosity range works; you are not locked to our oil. Actual consumption varies with viscosity (thicker oils atomize more slowly) and carries a ±1x tolerance in the spec sheet. You are welcome to send your oil for free compatibility and long-run testing before ordering. For ultrasonic units fitted with a micro-pore atomizing disc, water-soluble fragrance oil is required.
What fragrances and oil documentation do you supply?
Currently, the live catalogue carries 800+ fragrance and essential oil SKUs, including floral & fruity perfume oils, hotel-collection scents, 30+ single essential oils, carrier oils and hydrosols. Custom scent development and designer-inspired blends are available. Oil compliance documents — IFRA certificates, SDS/MSDS and COA — are provided with oil orders.
Certification, warranty & support
What certifications do the diffusers have?
Generally, all electric diffusers in the catalogue carry CE, FCC and RoHS certification, and battery models ship with the documents required for air transport. Region-specific files (UKCA, RED, REACH, UL/ETL) can be discussed against your target market. Certificates are confirmed at order stage — ask for the copies matching the models you shortlist.
What is the warranty, and are replacement parts available?
Generally, the diffusers carry a 1-year warranty, and every model includes free replacement parts (atomizer, seals and other wearing components) plus online technical support. Defective or DOA units are replaced according to the batch QC record; we send QC photos of every production batch before shipment and welcome live video or third-party inspection.
Request a quote
Tell us what you need
First, send your target models, quantity and destination market and we will return aroma diffuser wholesale unit price, carton specification, lead time, certificates and available shipping routes — usually within one working day.
- Private label from one carton, laser logo free
- Stepped wholesale pricing; full ODM from 300–1,000 pcs
- Courier, sea freight (30–45 days) or DDP, your choice
If the form does not load, email us directly at info@wholesalediffuser.com or open the OEM / ODM page.
WD Aroma at a glance
What is WD Aroma? We are a China-based aromatherapy diffuser solution provider and wholesale supplier, operating since 2018 with ISO 9001, CE, FCC, and RoHS certified manufacturing partners. Our catalog spans more than 50 waterless, nebulizing, ultrasonic, ceramic, and smart app-controlled diffuser models, plus over 500 fragrance and essential oils. Coverage runs from 100 cubic metre portable units to 8,000 cubic metre commercial HVAC systems for hotels, spas, offices, and retail brands. We support buyers at every stage: single-piece samples with your logo, private-label runs from 100 to 300 pieces, and full custom-mold ODM projects delivered 30 to 45 days after sample approval. Every order includes functional pre-production samples, batch quality inspection, export documentation, and tracked shipping. Browse the full range, request a wholesale price list, or start an OEM project from the product and sample-request pages.