British Products Made in British Foundries

Small Round Vents 3,3.5,4, 4.5, 5
RO12rps_369_rgbround-slotted-air-grillesRO8RO7Large Round Vents 6,7,8,9RO5RO4NBS Plus Endorsement Stamp Purple 256Small Round Vents 3,3.5,4, 4.5, 5

Round Slotted Vent Grilles

From: £30

Round Slotted Vent Grilles in painted black finish.

These grilles have two functions, either as vents or as drainage grilles. They are especially useful for inserting (rebating) into wooden floors or into wall to provide combustion air for log burning stoves and larger grilles for drainage grating outside.

Look carefully during episodes of ITVs “Emmerdale” and you may catch a glimpse of our round 12″ slotted grille in the main street (item RO12)

4, 5 and 6 inch round grilles are often used as vents in conjunction with round ducting

Drilling & mesh can be added for an additional cost, prices vary from £15 – £25 for mesh, and £5 – £10 for drilling depending on diameter.

There is no option for purchasing the smallest round vents drilled via this website – if drilling isn’t shown as an option and is required, please email for a proforma. Kindly note that drilled round grilles  of 5″and under are drilled to order and we cannot accept returns on them.

Please see table below for sizes and specifications.

Clear selection

Specification PDF for Cast Iron Round Vents and Drain Grates ciabRO1

 

Item Diameter (Inch) Diameter (mm) Slot size (mm) Weight (kg) Air Flow (mm2) Depth (Inch)
RO3 3 75 9 0.2 1200 3/8
RO35 3.5 88 12 0.4 1700 1/2
RO4 4 100 12 0.3 2500 3/8
RO45 4.5 115 14 0.4 3500 3/8
RO5 5 125 12 0.5 4000 3/8
RO6 6 150 12 0.75 6500 3/8
RO7 7 178 12 1.0 9000 3/8
RO8 8 197 13 1.5 12000 3/8
RO9 9 225 13 2.0 14000 1/2
RO12 12 305 15 6.0 25000 5/8