Warm Air Heating Guide

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Grilles and Registers

If you have warm air heating installed in your home, the air comes out of the wall, ceiling or the floor via metal devices that are know in the trade as registers, grilles or diffusers. It is important to know what device you are looking for when ordering and also how to measure them

RegistersRegister

Suitable for all types of room, a register is a metal grille that has adjustable up and down blades. They are usually fitted on side walls low down, particularly on older warm air systems. Ideally the blades should direct the air downwards.

 

 

GrillesGrille

Grilles can be used for providing relief air, combustion ventilation, compartment ventilation and return air. The blades are set in position and cannot be closed or adjusted. Grilles should be fitted so that blades prevent site through the face.

 

 

Diffusers (Floor or Ceiling)Diffuser

Installed in the floor or the ceiling when severed by a ceiling or underfloor duct. Floor diffusers are usually located below windows while ceiling diffusers are fitted in rooms with warm floors.

 

Most customers who call us ask for "vents" when looking for replacement registers or grilles. Use this guide to determine which device you actually require. If you are in any doubt, just ask!

 

To obtain the correct sized register or grille, remove the item from the wall and measure the duct size (hole) behind it. Measurements are usually taken in inches are given as length by height. For example, a 6 x 4 grille would be 6 inches wide and 4 inches high.

Registers Sizing Table

Pressed Steel Registers
INCHES MM
6 X 4 152 X 102
8 X 4 203 X 102
6 X 6 152 X 152
8 X 6 203 X 152
10 X 6 254 X 152
12 X 6 302 X 152
14 X 6 356 X 152
10 X 8 254 X 203
12 X 8 305 X 203
14 X 8 356 X 203

  Do You need replacement Registers or Grilles?

We can supply all sizes of registers, grilles and diffusers from stock. 2 colours are available for registers and grilles, white or honey beige. Diffusers are available in white or bronze.

 

If you would like any more information, please contact us

 

Grilles Sizing Table

Pressed Steel Grilles
INCHES MM FREE AREA INCHES²
6 X 4 152 X 102 18.9
6 X 6 152 X 152 27.2
8 X 4 203 X 102 27.63
8 X 6 203 X 152 38.0
10 X 4 254 X 102 34.73
10 X 6 254 X 152 49.22
10 X 8 254 X 203 62.93
12 X 6 305 X 152 56.72
12 X 8 305 X 203 72.62
12 X 10 305 X 254 90.75
12 X 12 305 X 305 104.16
14 X 6 356 X 152 64.77
14 X 8 356 X 203 85.54
14 X 12 356 X 305 122.77
14 X 14 256 X 356 141.49
16 X 8 406 X 203 93.15
16 X 16 406 X 406 173.27
18 X 12 457 X 305 151.57
18 X 16 457 X 406 204.34
18 X 18 457 X 457 220.74

Floor Diffusers Sizing Table

Heavy Duty Steel Floor Diffusers
INCHES MM
10 X 2¼ 254 X 57
12 X 2¼ 305 X 57
14 X 2¼ 356 X 57
10 X 4 254 X 102
12 X 4 305 X 102
14 X 4 356 X 102

Ceiling Diffusers Sizing Table

Steel Ceiling Diffusers
INCHES MM
10 X 2¼ 254 X 57
12 X 2¼ 305 X 57
14 X 2¼ 356 X 57

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