Aluminium Non Vision Door Grille

Brand

Navajyothi Air Flow

Product

NJ-Door Grille

Application

Exuast / Return air distribution for HVAC ventilation and air-conditioning systems

Product Description

Navajyothi Air Flow Door Grills also known as Aluminium Non Vision Door Transfer Grille is designed to provide efficient air transfer through doors or partition walls while preventing direct visibility between adjacent spaces. The grille features inverted V-shaped blades that ensure privacy without significantly restricting airflow. It is commonly used in HVAC ventilation systems for commercial, institutional, healthcare, and residential buildings.

Technical Specifications

Parameter	Specification
Material	High-quality Extruded Aluminium profile
Blade Type	Fixed Inverted “V” (Chevron) Non Vision Blades
Frame thickness	1.2 mm thickness
Flange	30 mm as standard
Blade thickness	1.2 thickness
Blade Spacing	18–20 mm (Typical)
Frame Type	Single Frame / Double Frame
Door Thickness	25–50 mm (Standard), custom available
Standard Finish	Natural Anodized / Powder Coated
Standard Colours	RAL 9010 White, RAL 9016 White
Optional Colours	Any RAL Colour shades
Installation	Screw Fixing (Visible or Concealed)
Corrosion Resistance	Excellent

Construction Features

Heavy-duty extruded aluminium frame.
Fixed non-vision chevron blades eliminate direct line of sight.
Double telescopic frame provides neat appearance on both sides of the door.
Corrosion-resistant aluminium construction.

Standard Sizes :

Width (mm)	Height (mm)
150	150
200	100
200	200
300	150
300	200
400	200
400	300
450	300
600	150
600	200
600	300
Custom Sizes	Available

Applications

Office Doors , Toilet Doors, Hospitals , Hotels, Schools
Clean Rooms , Electrical Rooms, Utility Rooms, Commercial Buildings

Optional Accessories

Insect Screen
Opposite/Counter Frame
Black Finish for Dark Room Applications
Custom Powder Coating

Double Frame Door Grille

Single Frame Door Grille

Performance Data Table :

Grille Size Width x Height (mm)	Gross Area (m²)	Effective Free Area Ak (m²)	Air Volume Flow Rate (l/s)	Air Volume Flow Rate (m³/h)	Core Velocity (m/s)	Static Pressure Drop ΔP (Pa)	Noise Criterion (NC Level)
300 x 150	0.045	0.019	10	36	0.5	2	<15
			20	72	1.1	7	<15
			30	108	1.6	15	18
			40	144	2.1	27	25
300 x 300	0.090	0.041	20	72	0.5	2	<15
			40	144	1.0	6	<15
			60	216	1.5	14	17
			80	288	2.0	24	24
450 x 300	0.135	0.062	30	108	0.5	2	<15
			60	216	1.0	6	<15
			90	324	1.5	13	17
			120	432	1.9	23	23
600 x 300	0.180	0.083	40	144	0.5	2	<15
			60	216	1.0	6	<15
			120	432	1.4	13	16
			160	576	1.9	22	22
600 x 450	0.270	0.124	60	216	0.5	2	<15
			120	432	1.0	6	<15
			180	648	1.5	13	16
			240	864	1.9	22	22
600 x 600	0.360	0.165	85	306	0.5	2	<15
			165	524	1.0	6	<15
			250	900	1.5	14	17
			330	1188	2.0	24	23