Aluminum VAV Diffuser

Variable Air Volume (VAV) diffusers are used for all-air air-conditioning system. The built-in damper enables independent control for each room by working together with thermostat or CO₂ sensor. VAV diffusers meet the individual requirements for room air temperature and fresh air as well as providing excellent temperature comfort and air distribution.

Energy efficient, Cost, Operation and Maintenance Compared with Constant Air Volume (CAV) system or fan coil unit plus fresh air system, VAV diffuser system can reduce the common problems of over cold or over heat. Less pressure is required for air handling unit, therefore to save 15~48% energy. Initial cost of VAV diffuser system is about 15% lower than the traditional VAV system (VAV boxes + air diffusers). Operation and maintenance is easier for VAV diffuser system.
Ducting System Ducting design shall ensure static pressure at VAV diffuser inlet not more than 62Pa, and not less than 12Pa at the worst point of ducting, for sake of keeping the regulating performance of VAV diffuser. The best method to realize the design target is to calculate proper length and size of duct base on the maximum allowed pressure drop between the first and the last VAV diffuser.
System Optimization The air flow balance among duct branches is critical for VAV diffuser system control. VAV diffusers can obtain air flow balance by its own control. However, the adjustment of static pressure, air flow and noise of the ducting system is necessary. VAV diffusers can meet the requirements of temperature control of individual zones, when the ducting system is balanced. Therefore, it is recommended to balance the ducting system before operation, and fix manual air flow control damper on duct branches when necessary.
Static Pressure The static pressure at VAV diffuser inlet shall above 12Pa to ensure sufficient air flow passing the diffuser. Noise will be significantly increased when static pressure exceeds 62Pa (Noise Criterion 35). Static pressure setting will be done by fan speed control and damper regulation. The application is shown as figure 1~2.

Data Sheet: Intelligent VAV Diffuser

Delivery Options:

Delivery Method

Incoterms Term

Applicable Countries

LCL, FCL by sea

EXW, FOB, CFR, CIF

General for all countries.

Air courier to door

DDU, DDP

General for all countries.

Air cargo to airport

CIF

General for all countries.

Door to door by road

DDP

Cambodia, Laos, Myanmar, Thailand, Vietnam. (keep expanding to more countries)

LCL=Less than Container Load.     FCL =Full Container Load
DDU = Delivery Duty Unpaid        DDP = Delivery Duty Paid
The above shipping information is general, and changing from time to time. Confirmation with us is necessary for each order.

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