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Engineering Data

1230 — Perforated Return Diffuser with Round Neck

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1234 — Perforated Supply Lay-in T-Bar Round Neck with Adjustable Curved-Blade Core

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1235 — Perforated Supply with Removable Face Lay-In T-Bar Round Neck

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1274 — Perforated Return Turned-Up Panel Only

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1280 — Lanced-Face T-Bar Filter Grille

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12P or 12POBD — Perforated Diffuser Face

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12PFF — Perforated Diffuser Face with Filter Frame

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12PFFI — Perforated T-Bar Filter Frame with Molded Insulated Back

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1400/AL1400 — Square/Rectangular Ceiling diffuser

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150 — Round Ceiling Diffuser

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1500 — Step-Down Ceiling Diffusers

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1520/AL1520 — Step-Down Ceiling Diffusers

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1540/1540D — Insulated Step-Down Ceiling Diffuser

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1560 — Step-Down Ceiling Diffusers

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1570 — Insulated Step-Down Ceiling Diffusers

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1600 — Commercial Round Ceiling Diffusers

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290 — Adjustable Curved-Blade Ceiling Diffuser with or without a Damper

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4230 — Perforated Return

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4235 — Perforated Supply

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4250 — Perforated Supply Diffuser

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470 — Baseboard Diffuser

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471 — Baseboard Return

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600/AL600 — Stamped, Lanced-Blade Supply Register with Multi Louver Damper 1, 2, 3, 4-way Register

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60GH/AL60GH — Stamped-Face Return Grille

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60GH7 — Stamped-Face Baseboard Return Grille - 7/8” Turnback

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632 — Stamped Ceiling/Wall Register

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633 — Stamped Ceiling/Wall Register

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63GH — Stamped-Face Return Grille

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649 — Baseboard Register

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652 — Baseboard Return Grille

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653 — Stamped Ceiling/Wall Register

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667 — Baseboard Register

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671 — Baseboard Return Grille

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800 — Stamped Floor Register

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825 — Return Floor Grille

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827 — Toe-Space Grille

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830 — Floor Register

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850 — Deluxe Floor Register

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875 — Toe-Space Grille

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900H or 900V and AL900H or AL900V — Single Deflection Supply with Multi-Louver Damper, Steel or Aluminum

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90H or 90V and AL90H or AL90V — Single Deflection Supply Steel or Aluminum

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990H or 990V and AL990H or AL990V — Double Deflection Supply, Steel or Aluminum

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AL1444/1444 — Modular Core Supply or Return Diffuser

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AL160 — Square Ceiling Diffuser with Multi-Louver or Opposed-Blade Damper

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AL271 — Adjustable One-Way, Curved Blade Sidewall Register with Multi-Louver Damper

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AL272 — Adjustable Two-Way, Curved Blade Sidewall Register with Multi-Louver Damper

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AL273 — Adjustable Three-Way, Curved Blade Sidewall Register with Multi-Louver Damper

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AL274 — Adjustable Four-Way, Curved Blade Sidewall Register with Multi-Louver Damper

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AL278 — Adjustable Straight Blade Sidewall Register with Multi-Louver Damper

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AL4240 — Four-Way Stamped-Face Ceiling Supply

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AL440 — Stamped Face Supply Diffuser

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AL700/700 — Nonvision Door Grille

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AL833 — Extruded Aluminum Floor Diffuser

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ALC — Ceiling Supply Grille

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ALCML — Ceiling Supply Register

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ALCOBD — Ceiling Supply Register

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ALEC5 Lay-In — Eggcrate Exhaust Grille

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ALEC5 R4 — Molded Insulated Back for Tbar

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ALEC5 — Eggcrate Exhaust Grille

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ALEC5FF Lay-In — Eggcrate Return Air Filter Grille for T-Bar

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ALEC5FF — Eggcrate Return Air Filter Grille

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ALH or ALV — Supply Grille

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ALHOBD or ALVOBD — Supply Register

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ALHR45 — Return Grille

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ALHR90 — Return Grille

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ALHV or ALVH — Supply Grille

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ALHVOBD or ALVHOBD — Supply Grille with Opposed-Blade Damper

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CB Series — Stamped, Curved-Blade Register with Multi Louver Damper

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Lima Performance Data, Edition 11 - October 2025

RZ 2-Way — Rezzin Sidewall/Ceiling Register — Two-Way

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RZ 3-Way — Rezzin Sidewall/Ceiling Register — Three-way

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RZ-Floor — Rezzin Floor Register

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RZ-Round — Rezzin Round Ceiling Diffuser

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S90 — Stationary-Bar Return Grille, Steel or Aluminum

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SW — Stamped, Lanced Blade Register with Multi Louver Damper

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