Air Outlet Design Reference

Classification and Specifications of Air Outlets: By Application: A. Supply air outlets; B. Return air inlets. By Type: A. Louvered outlets: available in square, rectangular, and circular shapes; blades may be single- or double-layered. B. Diffusers: available in circular, square, rectangular, and disc shapes. C. Nozzles: available in circular, rectangular, and spherical shapes. D. Linear slot outlets: available as single-slot or multi-slot types. E. Swirl outlets. F. Perforated plate outlets (including mesh plate outlets). G. Special-purpose outlets: e.g., chair-mounted outlets, luminaire-integrated outlets, perforated outlets, and grille outlets. Basic Specifications: Basic outlet specifications are indicated by neck dimensions (i.e., the interface dimensions with ductwork), arranged per GB 321 requirements; see Tables 1 and 2 for details. Basic Specifications of Circular Outlets (mm) — Table 1 Basic Specifications of Square/Rectangular Outlets (mm) — Table 2 Basic diffuser specifications may be arranged at equal intervals of 50 mm, 60 mm, or 70 mm. Model Designation: Specification codes represent one-tenth of the basic outlet dimension values. Model Examples: FJS-3225 — Rectangular diffuser, 320 × 250 mm FQP-16 — Spherical nozzle, 160 mm diameter FYS-25 — Circular diffuser, 250 mm diameter Technical Requirements: Air outlet products shall comply with the requirements of this standard and shall be manufactured according to approved drawings and technical documents. Allowable dimensional tolerances are as follows: a. Dimensional tolerances for rectangular (including square) outlets are specified in Table 4. Dimensional Tolerances (mm) — Table 4 Joint seam gaps on the decorative surface of outlet interfaces shall not exceed 0.15 mm for aluminum extrusions, and 0.2 mm for other materials.

10K121: Selection and Installation of Air Outlets

Comprehensive Collection of Latest Standard Drawing Sets (covering architecture, structure, plumbing, HVAC, electrical, fire protection, and other disciplines) 10K121: Selection and Installation of Air Outlets Publication Date: 2010-09-01 Effective Date: 2010-09-01 10K121, 'Selection and Installation of Air Outlets', is a national standard architectural drawing set applicable to the selection and installation of air outlets within ventilation and air-conditioning systems in newly constructed, renovated, and expanded civil and general industrial buildings. Compilation Contents: Part I covers selection guidelines, simplified construction diagrams, specification tables, and performance data tables for seven common types of air outlets: louvered outlets, diffusers, nozzles, swirl outlets, linear slot outlets, grille outlets, and special-purpose outlets. Part II includes construction installation instructions and detailed installation node diagrams. This drawing set incorporates advanced new air outlet products and technologies from both domestic and international sources, offering a wide variety of product types and comprehensive supporting data for convenient selection.

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