General Product Overview - Fire Rated Products

Nailor offers a wide variety of fire rated products that are designed to provide the unobtrusive appearance required for architectural excellence and the high engineering performance required for use in heating and cooling applications. Ceiling diffusers, plenum slot diffusers and even ductless return air grilles are some of the many styles that are available.
Nailor’s selection of fire rated products are classified for use in UL/ULC restrained or unrestrained floor/ceiling and or roof/ceiling assemblies which incorporate an exposed grid suspended ceiling (lay-in T-Bar) with up to a 3 hour rating. For details of fire rated assemblies, see the current UL Fire Resistance Directory or ULC List of Equipment and Materials Volume III Fire Resistance Ratings.

Radial Pattern Diffusers
Nailor 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.
Square Neck –
• Model 6500FRD – Fixed Pattern
• Model 6550FRD – Adjustable Pattern
• Model 6550IVFRD – Induction Vanes
Round Neck –
• Model 6505FRD – Fixed Pattern
• Model 6555FRD – Adjustable Pattern
• Model 6555IVFRD – Induction Vanes

Fire Rated Stamped Square Diffusers
The 4000 and 4400 series models are a fire rated version of the popular RNS series. They have been specially designed to provide an extremely cost effective, value engineered product. They offer both the unobtrusive appearance required for architectural excellence and the360°diffusion pattern at minimum NC levels required for high engineering performance.
Fixed Air Pattern –
• Models 4010, 4020 – Full Face
• Models 4030, 4040 – Panel Type
• Models 4010-SM (ULC only) – Surface Mount
Adjustable Pattern –
• Models 4010-1, 4020-1 – Full Face
• Models 4030-1, 4040-1 – Panel Type
Fixed Pattern 2-cone –
• Models 4410, 4420 – Full Face
• Models 4430, 4440 – Panel Type

Fire Rated Architectural Square Diffusers
These models are a fire rated version of the popular UNI series. Designed with the architect in mind, the diffuser sin this series are fashioned to blend in with most ceiling types to create the ultimate aesthetic look. Nailor has made available two performance styles; the standard UNI with a fixed 360°air diffusion pattern and the down blast diffuser for high ceiling applications.

Flat Panel –
• Models 4410-UNI, 4420-UNI – Full Face
• Models 4430-UNI, 4440-UNI – Panel
Downblast –
• Model UNI-PDFR – Perforated
• Model UNI-ADFR – Radial Vane

Fire Rated Perforated Diffusers
The fire rated diffusers in this series are the most popular choices of Nailor’s 4300 series perforated diffusers. Models included are the adjustable pattern controller design for ultimate performance flexibility. Available in both supply and return air styles with a choice of a flush or drop face.
Supply Air Adjustable Pattern Deflectors –
• Models 4070, 4080 – Flush Face
• Models 4075, 4085 – Drop Face
• Models 4070-SM (ULC only) – Surface Mount
Supply Air Curved Blade Pattern Controllers –
• Models 4070CB, 4080CB – Flush Face
• Models 4075CB, 4085CB – Panel Type
Return Air –
• Models 4470R, 4080R – Flush Face
• Models 4475R, 4085R – Panel Type

Fire Rated Modular Core Diffusers
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.

• Model 7500FRD – Square neck
• Model 7505FRD – Round neck

Fire Rated Ductless Return Grilles
The return air grille models in this series have been designed to compliment 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. The grilles are available in three styles, a perforated face, an eggcrate face or an open face model that can accommodate a grille by others.
• Models 4111, 4112, 4113 – Perforated Face
• Models 4114, 4115, 4116 – Eggcrate Face
• Models 4117, 4118, 4119 – Open Face (grille by others)

Fire Rated Ductless Return Filter Grilles
The return air filter grille models in this series have been designed to compliment the Nailor range of fire rated supply diffusers. These grilles are manufactured to accommodate a throw away filter by others. The grille shave 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, a louvered face or an eggcrate face.
• Models 4121, 4122, 4128 – Louvered Face
• Models 4124, 4125, 4126 – Eggcrate Face

Fire Rated Ductless Return Ceiling Dampers for Optional Grille
This unique product features a raised ceiling radiation damper mounted on an extended support frame above the ceiling line. It will accommodate any type of return air grille, filter grille or register manufactured from steel or aluminum. This allows the design engineer greater flexibility.

• Models 4127, 4128, 4129

Open Face Fire Rated Plenum Diffusers
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.
• Models 5200L – Turned in Leg
• Models 5200S – Hemmed Leg

Fire Rated Plenum Slot Diffusers
These plenum slot diffusers are designed for lay-in T-Bar. They are available for supply and return air. The supply air models feature pattern controllers that are available in three performance styles, four slot widths and up to four parallel slots. The return models are designed to match the look of the supply air models.
• Models 5550WB, 5575WB, 5510WB, 5515WB – 'Wiper Blade 'Pattern Controller
• Models 5550T, 5575T, 5510T – 'Ice Tong' Pattern Controller
• Model 5575 – 'Flip Flop' Pattern Controller
• Models 5550R, 5575R, 5510R, 5515R – Return Air