Suggested Division 15 Specification Modulinear Diffuser Plenum Adapters for Model ML Linear Slot Ceiling Diffusers Models: MP-39-SP - 1" Slot Modulinear diffuser plenums shall be TITUS Model MP-39-SP (enhanced spread performance). Plenums must be designed specifically for field attachment of TITUS ML or MLR Modulinear diffusers with 1-inch slot widths. Plenums shall include a factory drawn side inlet (welded-in inlets are not acceptable) to fit 1-, 2- 3-, or 4-slot diffusers of the sizes and mounting types shown on the plans and outlet schedule. Standard nominal lengths shall be 2, 3, 4, 5 or 6 feet. Model MP-39-SP shall have internal baffles to maximize air diffusion by shortening the throw and widening the spread of the discharged air. These diffuser plenums shall be available in the same sizes and mounting types as MP models. Optional internal insulation and field mounted inlet dampers shall be available for both designs (models MPI or MPI-__-SP). Plenums shall be provided by the manufacturer of the linear slot diffusers. Plenum material shall be galvanized steel. The manufacturer shall provide performance data with the linear slot diffuser and plenum tested as one assembly. The linear slot diffuser and plenum assembly shall be tested in accordance with ANSI/ASHRAE Standard 70-1991.