SHANDONG DELIN

Square diffuser


Square diffuser
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  • Square diffuser

Product Details

Product Introduction:
Our company’s square diffusers are among the most common ceiling‑mounted air outlets used in central air-conditioning and fresh‑air systems. Featuring a multi‑layered, square conical diffusion design, they deliver airflow that spreads evenly in all directions, creating an attached jet that quickly mixes with indoor air. This ensures uniform, comfortable air distribution and makes them widely suitable for indoor HVAC systems in shopping malls, office buildings, hotels, hospitals, and other types of facilities.

General technical parameters (using a mainstream aluminum alloy square diffuser as an example):

Parameter Item

Specification Details

Product Name

Square diffuser (square supply air outlet with four-way airflow)

Nominal size

Common specifications: 200×200 mm to 800×800 mm (commonly used ceiling‑mounting size: 600×600 mm)

Material Configuration

Standard configuration: aluminum alloy profiles (with electrostatic powder coating); optional: ABS plastic

Air outlet type

Air is evenly diffused in all directions, forming an attached jet.

Applicable wind speed

Recommended supply air velocity: 2~4 m/s

Applicable airflow volume

Randomly variable dimensions to meet the airflow requirements of different systems.

Installation method

Ceiling-mounted recessed installation, flanged connection to ductwork.

Optional Accessories

Equipped with an airflow regulating valve and a filter screen.

Applicable medium

Air-conditioning supply air and fresh air, medium temperature - 10℃~+60℃

Work environment

-10℃ to +60℃, relative humidity ≤95% (no condensation)

Applicable Scenarios and Selection Recommendations:
Core use cases:
1. Ceiling-mounted supply air outlets for the central air-conditioning systems of shopping malls, office buildings, hotels, hospitals, and other types of structures.
2. Areas with high requirements for air distribution uniformity and comfort, such as conference rooms, offices, and dining halls.
3. Terminal air supply outlets of the fresh-air system and the purified air-conditioning system
Key considerations for selection:
1. Select based on ceiling and duct dimensions: Prioritize models that match the ceiling grid size (e.g., 600×600 mm) and ensure compatibility with the duct’s internal diameter to avoid installing a reducer.
2. Select the fan based on the design airflow rate: Calculate the supply air velocity according to the system’s total airflow, and recommend keeping the velocity within 2–4 m/s to minimize noise and excessive pressure loss.
3. Material Selection: In humid and corrosive environments, aluminum alloy is the preferred choice; for cost‑sensitive applications, ABS plastic may be selected.
4. Additional functional requirements: When airflow adjustment is required, it is recommended to install an airflow control valve to facilitate system commissioning.


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