Air diffusers are custom-made based on the opening size for easy installation. The actual inner diameter (length and width) of the diffuser is slightly smaller, approximately 0.5-1.0 cm less than the net opening size.
Louvered Air Diffusers in HVAC Systems
Louvered air diffusers are widely used in HVAC systems as supply air outlets. Depending on requirements, these diffusers can be equipped with aluminum airflow control valves (damper blades). Double-layer louvered diffusers have two layers of vertically adjustable blades for horizontal and vertical airflow control, adjusting the diffusion surface to alter the throw distance. The outer frame of the diffuser comes in both wide and narrow options, suitable for special ventilation system requirements. The adjustable angles of the blades allow for customized airflow direction and diffusion.
Aluminum Alloy Louvered Diffusers
Aluminum alloy diffusers are prone to condensation but are relatively cost-effective.
Installation Considerations for Air Diffusers
- Early Installation for Ease and Aesthetics: Install the diffusers before painting the covers to avoid wall damage, ensuring a neat appearance even if there is some paint splatter.
- Sealing Gaps: Address the gaps between louvers and walls by installing the diffusers first, and filling the gaps during painting for a seamless finish.
Air Diffuser Installation Guidelines
- Avoiding Light Fixtures: Do not place light fixtures at air outlet locations to prevent obstruction of airflow and ensure effective heating.
- Optimal Louver Angle: Adjust horizontal louvers to 45 degrees during winter heating for optimal performance, as angles too high or low may affect heating efficiency.
- Regular Cleaning: Larger air outlets may accumulate dirt, impacting airflow temperature and aesthetics. Users should periodically clean air diffusers for optimal ventilation.
Understanding Air Diffusers in HVAC
Air diffusers are essential terminal devices in central HVAC systems for supplying and returning air. They contribute to effective air circulation, ensuring both heating/cooling efficiency and indoor comfort.
Types of Air Diffusers
Air diffusers include return air outlets, supply air outlets, inspection ports, and external wall outlets.
Fixed Strip Diffusers
Fixed strip diffusers are used in both heating and cooling HVAC systems and can be installed on side walls or ceilings.
Self-Dropping Louvered Diffusers
Self-dropping louvers automatically vent positive-pressure air-conditioned rooms. The louvered blades hang naturally, preventing air exchange between indoors and outdoors. The diffuser acts as a one-way check valve.
Production Process
Primarily used for return air outlets, these diffusers often pair with filters and offer adjustable louvers. They come in FK-2 and FK-20 models, with FK-2 having a wide frame, while FK-2a or FK-20a is a core-style single-layer louvered diffuser for easy cleaning and maintenance.
Custom Shaped Louvered Diffusers
Custom-shaped louvers are a type of air distributor used in HVAC systems. Common types include single-layer louvers, double-layer louvers, side grilles, and slot grilles.
Aluminum Alloy Supply Air Diffusers
Designed with cold-rolled steel and electrostatically sprayed surfaces, aluminum alloy supply air diffusers are suitable for cleanroom construction. They boast advantages such as low investment and easy installation.
Aluminum Alloy Diffuser Characteristics
Aluminum alloy supply air diffusers release airflow in a “flat send” manner with a multi-conical structure. The diffuser is suitable for various cleanroom levels and maintenance structures, offering options in materials like carbon steel, stainless steel, aluminum, and plastic. They are particularly effective for rooftop supply air in non-uniform cleanrooms.
Secondary Oxidation Coating
Aluminum alloy diffusers feature a secondary oxidation coating, providing resistance to rain and fire. The diffusers can be assembled into large louvered windows to achieve high airflow and excellent sound absorption, with interlayer blades containing sound-absorbing materials.
This comprehensive guide provides insights into the various types of air diffusers, their installation, and applications in HVAC systems.
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