Global IFS Sidewall Displacement Diffuser (SDD) October 2020

- B. Product Listing Organization Qualifications: An organization recognized by OSHA as a Nationally Recognized Testing Laboratory (NRTL) and acceptable to authorities having jurisdiction.

### 1.07 Warranty

- A. See Section 01 7800 - Closeout Submittals, for additional warranty requirements.
- B. Provide 12 month manufacturer warranty from date of shipment for displacement diffusers.

### PART 2 – PRODUCTS

### 2.01 Displacement Flow Recessed Diffuser

- A. Basis of Design: Global IFS.
- 1. Sidewall Displacement Diffuser: Model SDD

B. General Product Information:

- 1. Furnish and install Global IFS model SDD sidewall displacement diffuser of the sizes and capacities indicated on the drawings or outlet schedule.
- 2. Unit sizes shall be selected in accordance with ASHRAE guidelines and manufacturer’s literature.
- 3. Manufacturers shall demonstrate that they have successfully supplied and installed underfloor HVAC products, as well as the computer modeling thereof for a minimum of 10 years.
- 4. Manufacturers must be pre-qualified to bid based on the completion of a minimum of [xx] jobs in similar climates.
- 5. Manufacturers shall provide a list of completed jobs and references.

### 2.02

Sidewall Displacement Diffuser

- A. Description:
- 1. Furnish and install Global IFS Model SDD sidewall displacement diffuser with the sizes, capacities, and options as indicated on the plans and air outlet schedule.
- 2. The displacement diffuser shall deliver air to the occupied space at low noise levels, with uniform, low velocity across the diffuser face in all ducting configurations without the use of nozzles.
- B. Performance:
- 1. The diffuser manufacturer shall provide sound and pressure drop data derived from tests in accordance with ASHRAE 70.
- 2. Performance data for Draft Rate (%DR) shall be provided based on tests in accordance with ASHRAE 55.
- 3. A software program shall be available to aid in performance assessment by allowing room comfort evaluation for specific operating conditions and diffuser locations.
- a. If evaluation software is not available, the manufacturer shall supply, free of charge, a CFD model of the representative spaces completed by a modeling contractor who has demonstrable qualifications to model such a space.
- b. The qualifications shall include no less than 10 years of experience in the modeling of displacement ventilation systems, thorough validation of the code through comparison to empirical data, as well as a list of references.

C. Construction:

- 1. The displacement flow recessed diffuser shall be constructed with an aluminum equalization baffle behind the perforated diffuser face for uniform, low velocity distribution of supply air. Both the equalization baffle and the face shall be securely retained in the diffuser frames.
- 2. The diffuser shall be supplied with an installation frame for recessed installation.
- 3. The diffuser frame shall be constructed of high strength aluminum for rigidity and protection of the perforated face and side panels. The perforated front panel shall be constructed of painted 18 gauge perforated steel, and the installation frame shall be 24 gauge steel.
- 4. The diffuser shall not have visible fasteners on the front or side panels.
- 5. The diffuser inlet shall be available for duct connection at the rear.
- 6. Plastic nozzle arrays or any plastic components shall be unacceptable.

D. Finish (select one):

- 1. All steel components shall have B12 White baked-on powder coat finish. Epoxies and their derivatives shall not be acceptable. Visible non-metallic components shall not be acceptable.
- a. The paint finish must demonstrate no degradation when tested in accordance with ASTM D1308 (covered and spot immersion) and ASTM D4752 (MEK double rub) paint durability tests.
- b. The paint film thickness shall be a minimum of 2.0 mils.
- c. The finish shall have a hardness of 2H.
- d. The finish shall withstand a minimum salt spray exposure of 500 hours with no measurable creep in accordance with ASTM D1654, and 1000 hours of exposure with no rusting or blistering as per ASTM D610 and ASTM D714.
- e. The finish shall have an impact resistance of 80 inch-pounds.
- 2. All stainless steel components shall have #4 polished finish on exposed surfaces.

E. Mounting/Fastening:

- 1. The diffuser shall be installed within the supplied installation frame. The diffuser shall have no visible fasteners or framing and shall be held within the supplied installation frame with secure mounting clips.

Diffusers, Registers, and Grilles - SDD 23 37 13 -2