High capacity single slot linear diffuser available in five slot widths, offers an attractive alternative to traditional multi-slot designs. Available slot widths are 1" (25), 1 1⁄2" (38), 2" (51), 2 1⁄2" (64) and 3" (76). A two slot option is also available. Many frame styles are available including a tapered frame that allows for mud in/tape and spackle applications.

The FlowLine™ Series is available in modular lengths for lay-in T-Bar applications, utilizing either the horizontal high throw or vertical jet throw pattern controllers. Units are supplied with factory installed engineered plenums in uninsulated or insulated versions.

The FlowLine™ Shapes series maintains its high capacity performance and sleek design while being able to interface with Armstrong®, DesignFlex™ ceiling systems. Available in triangular and parallelogram configurations, these 1" (25) width slot diffusers can include a plenum in supply applications and a perforated face in return applications. 
Armstrong®, DesignFlex™ are trademarks of AWI Licensing LLC.

The FM Series is an architecturally pleasing modular square ceiling diffuser primarily for lay-in T-Bar applications. Designed to compliment the FlowLine™ Linear Diffuser System, the FM Series features a single slot at the perimeter of a 24" x 24" or 600mm x 600mm ceiling module and accommodates a center acoustic ceiling tile.

Nailor 5700 Series Plenum Slot Diffusers feature a friction pivoted, adjustable, extruded aluminum pattern controller in each slot. The pattern controller has a gasketed 'wiper blade' design. The direction of the airflow can be adjusted a full 180° from the face of the diffuser. This diffuser is available in 1 1/2", 1", 3/4" and 1/2" slot widths. Suffix 'I' adds internal insulation.

Nailor 5800 Series Plenum Slot Diffusers feature an 'ice tong' shaped pattern controller. Adjusting the pattern controllers can change the direction of the airflow a full 180° and the controller can also be used for volume control. Available in 1", 3/4" and 1/2" slot widths, and with a choice of 1, 2, 3 or 4 parallel slots. Suffix 'I' adds internal insulation.

Nailor 5600 Series Plenum Slot Diffusers feature a roll-formed curved blade pattern controller in each slot. Aerodynamically designed to produce a fixed horizontal discharge pattern, the controller is pivoted at either end and may be simply rotated with fingers from the face for either a left or right discharge direction. This diffuser is available with a 3/4" slot width, and with a choice of 1, 2, 3 or 4 parallel slots. Suffix 'I' adds internal insulation.

Model Series 59N include pattern controllers that provide a fixed horizontal discharge that produces a tight blanket of air into the room. Model Series 59BS have pattern controllers that provide an adjustable vertical discharge along the wall or in perimeter applications. Both are available in Supply or Supply/Return models for use in high performance applications.

Nailor offers a wide range of accessories and options for plenum slot diffusers. Inlet dampers, plaster frames, mounting clips, supplementary T-Bars, and cross-notching are available.

Nailor 6500 Series Steel Pattern Diffusers are typically used in applications where considerable volumes of air are required while maintaining relatively low noise levels and pressure drops. A full range of models are available and consist of a choice of fixed and adjustable patterns. Induction vanes are also available for those jobs that require quick equalization of cool and warm air such as in VAV systems with high cooling loads. The louvered cores are removable and are available in an assortment of patterns.

Nailor’s aluminum constructed pattern diffusers are typically used in applications where considerable volumes of air are required while maintaining relatively low noise levels and pressure drops. A full range of models are available and consist of a choice of fixed and adjustable patterns, as well as extra high capacity models. Induction vanes are also available for those jobs that require quick equalization of cool and warm air such as in VAV systems with high cooling loads. The louvered cores are removable and are available in an assortment of patterns.

Nailor 51S, 51D, 61S, 61S, and 67S Series Supply Grilles and Registers feature front and rear adjustable blades for supply air applications. They are available in corrosion-resistant steel, extruded aluminum, or stainless steel construction. 

Model Series 5145, 5155, 6145, 6155, 6745, 6755, 51F, 61F, and 67F grilles and registers are available in cost effective, corrosion-resistant steel, premium quality extruded aluminum or stainless steel construction. The blades are formed to a streamlined contoured cross-section and are fixed at either 45° or 0° for return air applications.

Nailor has a large selection of Round Supply Louvered Grilles. Standard options include double and single deflection with options for 1", 2" and 3" spacing. Three frame options are available for all models.

Model RECG Round Eggcrate Grille is mainly used in commercial and industrial applications. It has a low air resistance and low noise levels. The RECG can be used for exhaust, return or supply applications.

Round Perforated Grilles combine versatility and modern aesthetics of a flowing circular design with superior performance and high quality. 

Nailor 5000 Series Linear Slot Diffusers provide architectural excellence and outstanding performance flexibility. Available in four different slot opening widths, a range of 1 to 10 slots, and a wide choice of border/frame styles, including a tapered frame that allows for mud in/tape and spackle applications. They feature 'ice tong' style individual pattern controllers in each slot that not only offer a 180° air pattern adjustment, but can also be used to dampen airflow. Designed primarily for ceiling and high sidewall installation, they are eminently suited to, and recommended for, VAV applications. They maintain a tight and stable horizontal air pattern over a wide range of air volumes by utilizing the maximum ceiling Coanda effect. Also commonly used in overhead heating applications, the versatile pattern controllers allow vertical projection of heated air to meet almost any perimeter condition.

The Nailor 4900 Series provides an extruded aluminum bar grille that offers beautiful styling and efficient performance. Linear bar grilles offer a choice of fixed air patterns with 0°, 15° or 30° air deflection, a choice of bar widths and spacing and a wide choice of border/frame style combinations to suit most types of installation including a tapered frame used in mud in/tape and spackle applications. They are available with an optional opposed blade damper for volume control. Linear bar grilles are recommended for supply air applications in floors, window sills, and high sidewall locations. They are not generally suited to ceiling mounted supply applications (other than for directional spot heating or cooling as an air curtain) as they are not designed for horizontal projection from the face.

Nailor 48LL Series Linear Louver (Vane) Diffusers are designed to provide a high capacity, architecturally pleasing linear diffuser that can supply large volumes of air at relatively low sound levels and pressure drops. High quality, extruded aluminum angular discharge louvers are designed to create a stable horizontal air pattern that is tight to the ceiling. Ideal for applications in VAV systems, these diffusers create a strong ceiling coanda effect at typical maximum and minimum flowrates and ensure optimal comfort conditions.

Nailor Series 48LV Linear Vane diffusers are suited for high capacity airflows.  The diffusers are extruded aluminum and available in either a one or two-way pattern. The deflectors vanes are fixed and the core assembly is removeable.

Nailor RNS Series Square Ceiling Air Diffusers have been specially designed to provide an extremely cost effective, value engineered product. They offer both the unobtrusive appearance required for architectural excellence and the 360° diffusion pattern at minimum NC levels required for high engineering performance. Aluminum ARNS and ARNS3 models available.

Nailor Models RNSA and ARNSA Adjustable Square Ceiling Air Diffusers are designed to provide both the unobtrusive appearance required for architectural excellence and the 360° diffusion pattern at minimum NC levels required for high engineering performance. They provide the flexibility of a standard horizontal discharge or near vertical discharge pattern, useful in high ceiling applications where better air penetration or spot heating may be desired. The stamped one-piece cones eliminate mitered corners and the die-formed curves provide consistent quality and performance.

Nailor Model TWR "Twister " Diffuser is engineered to optimize air distribution effectiveness. This next generation diffuser has a high induction, 360° swirl pattern for a superior coanda effect. It is available for a 24" x 24" ceiling module with a choice of five round neck sizes.

Nailor 61DC, 61SC, 51DC, 51SC, and 61LC Series Curved Spiral Duct Supply Grilles are for use in exposed spiral duct applications. The design features individually adjustable blades that provide maximum flexibility to meet space requirements. Available in steel or aluminum single or double deflection and extruded aluminum linear slot face configurations.

Nailor 5145HC, 5155HC, 6145HC, 5155HC, 51PRC, and 61PRC Series Curved Spiral Duct Supply Grilles are for use in exposed spiral duct return air applications. The design features a true full radius design that provides an architecturally superior appearance . Available in steel or aluminum single louvered face or aluminum perforated face configurations.

The Air Nozzle product line is quite extensive. It includes models with directional air pattern control and 360° rotation. Model RANF is "No Core” outlet, for task applications.  Multiple mounting types are available.  They can be used for both supply and return applications.

Jet Nozzles, otherwise known as Punkah Louvers, are suited for industrial, institutional or commercial applications requiring accurate directional control of a concentrated column of air.

Nailor's Light Troffer Diffusers are designed to attach easily to standard air handling fluorescent light troffers. They provide an inconspicuous appearance with high engineering performance. Nailor manufactures both a single side or a double side diffuser.

The 'UNI' Series Square Ceiling Air Diffuser has been specially designed to provide both the unobtrusive appearance required for architectural excellence and the 360° diffusion pattern at minimum NC levels required for high engineering performance.

The 'UNI-PD' and ‘UNI-AD’ Downblast Square Ceiling Diffusers have been specially designed to provide both the unobtrusive appearance for architectural excellence and the high airflow at minimum NC levels needed in theater, auditorium and other high ceiling applications.

Nailor 5000CTD Series Architectural Ceiling Tile Slot Diffusers have been designed with the architect in mind to provide an unobtrusive high performance ceiling diffuser that incorporates a center ceiling tile (by others) that matches the surrounding ceiling system.

Nailor 6600 and 66UNI Series Ceiling Diffusers have been designed to satisfy both architectural and engineering criteria. The clean uncluttered face panel design compliments any decor, blending beautifully with virtually any architectural style or requirement.

Nailor 71D and 71S Series Airfoil Blade Grilles and Registers are recommended for supply air applications in systems requiring maximum flexibility. Blades are adjustable and individually pivoted to ensure positive positioning when adjusted to desired deflection setting. Optional roll-formed steel opposed blade damper has a screw driver slot operator accessible through face of register.

Nailor 71F and 7145 Series Airfoil Blade Grilles and Registers feature fixed horizontal airfoil blades spaced on 3/4" (19) centers with 45° or 0° straight face deflection, ideal for return air applications. They have been dsigned and constructed to compliment their supply model counterparts.

Nailor RNR, RUNI, RDB, and 6300R Series Round Diffusers are available in steel construction with adjustable or fixed patterns. Included in this series of diffusers is a 'Plaque' style for architectural ceilings and a 'Downblast' type for high ceiling areas. ARNR, ARNRA1, ARUNI aluminum models available.

Models 4260 and 4260AA Eggcrate Aluminum Return Diffusers feature a 1/2" x 1/2" x 1/2" (13 x 13 x 13) core that provides a high free area. Available with either a round or square neck for ducted return applications. The backpan or frame is available in both corrosion-resistant steel and aluminum construction.

7200 and 7500 Series Modular Core Ceiling Diffusers have four individual spring-loaded modular pattern controllers. The pattern controllers are shipped in a 4-way discharge pattern and can easily be field adjusted to provide a 1, 2, or 3-way discharge pattern. Available with square necks and optional round transitions. Steel and aluminum construction models available.

51CC, 51CCD, 61CC, and 61CCD Series Curved Blade Diffusers feature individually adjustable deflectors and are integrated in a modular sized panel to suit many ceiling systems. If ordered with directional vanes, a 1 or 2-way discharge pattern is available. If directional vanes are not required, the curved blade deflectors are offered in a 1, 2, 3, or 4-way discharge pattern.

Nailor offers an extensive selection of accessories for ceiling diffusers such as air balancing devices, air extractors, and a selection of mounting frames.

Nailor 4310, 4320, 4330, 4340, and 4350 Series Perforated Diffusers feature a perforated face available in both corrosion-resistant steel and aluminum, with 3/16" (5) diameter holes on 1/4" (6) staggered centers, providing 51% free area. As standard, backpans are available in corrosion-resistant steel with an option of aluminum, and some premium models are available with extruded aluminum frames. The diffusers can be selected to suit most common ceiling types, and are available with both flush and drop face styles. A variety of pattern controllers and deflector core styles are offered, allowing for a selection to be made based upon style, performance, and budgetary considerations.

Nailor 4302, 4310, 4330R, 4340R, 4350R, 4360, and 4365 Series Perforated Return Diffusers are designed to match supply air models in appearance and construction detail less the air pattern controllers which are not required.

Nailor 6500-FRD Series Pattern Ceiling Diffusers are a high capacity louvered face directional diffuser that can supply large volumes of air at relatively low sound levels and pressure drops. Available in a variety of core styles and neck sizes; a combination can be selected to suit a specified air pattern and deliver the desired volume of air to suit particular requirements.

4000 and 4400 Series Diffusers are a fire rated version of the popular RNS Series Stamped Square Ceiling Diffusers. They hare designed to provide an extremely cost effective product that offers both the unobtrusive appearance required for architectural excellence and the 360° diffusion pattern at minimum NC levels required for high engineering performance.

Nailor 4400-UNI Series Fire Rated Stamped Square Diffusers are the UL classified and listed fire rated version of the popular UNI series. Designed with the architect in mind, the diffusers in this series are fashioned to blend in with most ceiling types to create the ultimate aesthetic look.

Nailor 4070, 4075, 4080, and 4085 Series Fire Rated Perforated Diffusers are a popular choice and frequently specified solution. Available in both supply and return air styles with a choice of a flush or drop face.  Adjustable pattern controller design available for ultimate performance flexibility. 

This diffuser features four individual spring-loaded 'modular' pattern controllers mounted in the neck. They can be adjusted before or after installation, to provide a 1, 2, 3 or 4-way discharge pattern. The diffuser maintains a horizontal ceiling pattern from maximum to minimum flow.

Nailor 4110 Series Fire Rated Return Air Grilles have been designed to complement the Nailor range of fire rated supply diffusers. The grilles have been tested and classified for use without the requirement of duct work or supplementary support, they simply lay in place. Available in three styles: perforated face, eggcrate face, or an open face model that can accommodate a grille by others.

Nailor Models 4121, 4122, 4123, 4124, 4125, and 4126 Fire Rated Return Air Filter Grilles have been designed to complement the Nailor range of fire rated supply diffusers. Manufactured to accommodate a throw away filter by others, the grilles have been tested and classified for use without the requirement of duct work or supplementary support, they simply lay in place. The filter grilles are available in two styles: louvered face or eggcrate face.

This unique product features a raised ceiling radiation damper mounted on an extended support frame above the ceiling line. It will accomodate any type of return air grille, filter grille or register manufactured from steel or aluminum. This allows the design engineer greater flexibility.

This fire rated plenum is designed for lay-in T-Bar. It can accommodate steel or aluminum grilles, registers or linear type slot diffusers and bar grilles. A turned in leg design is available to suit lay-in type cores and a hemmed leg design is available to accommodate concealed mounting angles.

Nailor 5500 Series Fire Rated Plenum Slot Diffusers are designed for  supply and return air lay-in T-Bar applications. The supply air models feature pattern controllers that are available in three performance styles and four slot widths, up to four parallel slots. The return models are designed to match the look of the supply air models.

Nailor 51C, 51CD, 61C, and 61CD Series Curved Blade Grilles and Registers are designed to meet the demand for top quality and competitive prices. They provide an unobtrusive appearance essential for architectural excellence. Available in a 1, 2, 3, or 4-way discharge pattern in steel or aluminum construction. Optional opposed blade damper has a screwdriver slot operator.

Nailor 51EC, 51EC45, 61EC, and 67EC Series Eggcrate Grilles and Registers feature high free area and a clean, crisp architectural look. Available in a standard grid size of 1/2" x 1/2" x 1/2" with 1/2" x 1/2" x 1" or 1" x 1" x 1" grids optional. A variety of frame types and mounting options are available to suit any application.

Nailor 51PR, 61PR, and 67PR Series Perforated Grilles and Registers feature a high free area perforated face and is available in a choice of aluminum, steel or stainless steel construction. Their general appearance matches and compliments the Nailor 4300 Series Perforated Supply Diffusers. Optional roll-formed steel opposed blade damper has a removable key operator or screwdriver adjustment through the face of the register with a special access hole.

Nailor 51F, 61F, and 67F Series Filter Grilles, available in steel or aluminum construction, have been designed for quick access to 1” (25) or 2" (51) throw away type filter (by others) and for complete grille removal to aid in cleaning. They have designed to match and compliment their standard Nailor Return Grille and Register counterparts.

Nailor 51DG and 61DG Series Door Grilles are designed to be completely sight proof and unobtrusive in appearance. Available in either steel or aluminum construction with either single or double flange frame options. A fire-rated version is also available.

Nailor 51RC and 51RCD Reversible Core Grilles and Registers allow a versatile combination of four different deflections and is removable without the need of special tools. Optional deflector vanes and an opposed blade damper are available for additional air control.

These extruded aluminum drum louvers are appropriate when high volumes of air are used and in spot heating and cooling applications. A split-vane style and a pole operating bracket are available.

The industrial supply grilles and registers have contoured airfoil blades that are extruded aluminum and are available with either 1 1/2" (38) or 3" (76) blade spacing. The heavy gauge, 1 1/4" (32) frame includes reinforced and staked mitered corners.

Lattice face grilles are available in heavy gauge aluminum, steel and stainless steel construction with a selection of hole patterns to choose from. Countersunk screw holes and mounting screws are optional.

Nailor offers an extensive selection of accessories and options for grilles and registers. Accessories include air balancing devices (OBD), air extractors (EX), and a variety of mounting frames, including the (PF) grille plaster frame. Grille options consist of special finishes, gaskets (GK), alternative frames (PLS, FPS, PLA, FPA) and a variety of other items.

Nailor’s maximum security grilles and registers are constructed from heavy gauge welded steel and are for use in areas where maximum security is vital. These grilles can be used for both supply and return air applications.

This sidewall bar grille is constructed from 14 gauge steel and has blades that are fixed at 40° or 0° deflection. The louvered blade and steel mesh screen are reinforced with heavy gauge steel mullions and a welded sleeve. These grilles can be used for both supply and return air applications.

These diffusers are a combination of a louvered pattern diffuser with a lattice face plate for minimum security protection. The diffusers are available with a choice of 1, 2, 3 or 4-way throw patterns. Use these diffusers in applications where constant supervision occurs.

These minimum security/bar grilles are all aluminum rustproof construction, which makes them ideal for use in showers and wet areas. The frame and blades are welded for extra strength. These grilles have 0° deflection blades that are spaced on either 1/2" (13) or 1/4" (6) centers.

These louvered blade grilles and registers are paired up with a lattice face plate to meet minimum security requirements. They are available for both supply and return air applications with a choice of steel or aluminum construction.

These lattice face grilles are offered as an economical return air grille for minimum security applications. They are available in heavy gauge steel or heavy gauge aluminum with a selection of hole pattern designs.

This supply air grille has adjustable rear vanes for directional control. The fixed extruded aluminum front blades are supported by a deep profile cross bar for strength.

Model Series 5130-HD and 51F-HD Heavy Duty Return Grilles and Registers are designed to combine heavy duty aluminum construction and pleasing architectural design. They are constructed to offer the strength and durability required to withstand abuse in applications such as schools, gymnasiums, stairwells, hotels and other locations requiring strong impact resistance.

Nailor 61-HD Series Heavy Duty Supply Grilles are offered with both single and double deflection blades. The adjustability of the blade is 0° – 40° deflection and they are spaced on 1/2" (13) centers. The double deflection rear blades are spaced on 3/4" (19) centers.

Heavy gauge frame and blades and all welded construction make this series of grilles and registers extremely durable. These models are perfect for locations that require strong impact resistance. The blades are spaced on 1/2" (13) centers.

Model Series 6755-HD grilles are used mainly for return air applications that require strength and durability in corrosive or high humidity environments. The frame is welded and the blades are spaced on 1/2" (13) centers and reinforced with a mullion on 8" (203) centers.

The UNI2-VAV is a variable volume diffuser that regulates the amount of supply air into the space. The diffuser has a factory mounted controller, sensor and actuator. A non-programmable thermostat is required on master units and controls up to 20 different diffusers. The diffuser is manufactured from corrosion-resistant steel.