Ceiling Diffusers
Factory-direct ceiling diffuser models — round ceiling diffuser, square 4-way, louvered, and modular core. 16 models in steel and aluminum with damper options.
Source Ceiling Diffusers wholesale — factory direct
Manufactured in Dongyang, China. No trading companies, no middlemen. Airwise has supplied HVAC distributors and contractors across 60+ countries for 25+ years.
100 pcs
Standard catalog items
25–35 days
Sea freight ex-China
UL · CE · M1
1 of 3 UL-listed in China
60+
Countries served
Distributors & wholesalers
Source ceiling diffusers by the container. Standard stocking assortments or a custom size and finish mix. Monthly recurring orders with priority production queue.
Mechanical contractors
Project-based ceiling diffusers orders. We review your mechanical drawings and recommend the right models — free on orders over 100 pcs. Custom sizes available.
OEM & private label
Manufacture ceiling diffusers under your brand. Custom dimensions, finishes, packaging, and documentation. Dedicated production runs from 500 pcs.
Learn more about diffusers
HVAC Diffuser Types Guide
9 diffuser types with selection matrices and airflow patterns
Grille vs Register vs Diffuser
When to use each and how they affect airflow
Linear Slot Diffuser Design
Slot configurations, throw patterns, and sizing
Plenum Box Sizing Chart
Size the plenum box that connects to your diffuser
Ceiling Diffusers — FAQ
What is the MOQ for ceiling diffusers?▾
Standard items start at 100–500 pieces. Custom or OEM orders usually require 500–2,000 pieces. Contact us for exact pricing.
Do you offer OEM/ODM for ceiling diffusers?▾
Yes. Custom dimensions, materials, finishes, and packaging. We have been an OEM partner for global HVAC brands for 20+ years.
What is the lead time for ceiling diffusers?▾
Standard items: 15–25 business days from China. Custom/OEM: 30–45 days. US spiral ducts: 5–10 days from Houston, TX.
What certifications do your ceiling diffusers have?▾
UL, CE, M1, ROSH, and AWTA depending on the product line. View certifications.
Need custom diffusers?
OEM manufacturing, custom dimensions, private labeling. Quote within 12 hours.