Vent and Drainage Grilles

Application

  • Conservation Cowled Vent: For bathrooms, cloakrooms, tumble dryer outlets, kitchens and all outlets and inlets where either a 4" (103 mm) ducting, or 5" (125 mm) ducting is used in listed buildings, restored/ conserved apartments, care homes, manor houses and farm houses.
  • Daisy (3" and 10"): Can be used in conjunction with cavity wall sleeves as interior vent grilles using single and double Windsor cast iron air bricks on the outside.
  • Heritage: Often used as a feature in drainage, garden landscaping and walkways.
  • Round, slotted: Useful for inserting (rebating) into wooden floors or into walls to provide combustion air for log burning stoves and larger grilles for drainage grating outside.
  • Square holes, made to measure: Suitable for use on castles, keeps and manor houses, as well as modern extensions and art galleries.
  • Westminster, 3" high slotted and Square, slotted: These can be used for ventilation of air (supply or exhaust) either in interiors or exterior to the property, and also exterior for drainage gratings.

Description

Cast iron vent and drainage grilles, available in various designs.

Features and benefits:

  • Helps to provide natural ventilation in buildings.
  • Acts as a cast iron terminal grille on forced extraction.
  • Useful for replacing inappropriate plastic grilles on listed and period properties.
  • Manufactured in the UK.
  • Can be supplied in bespoke finishes to match existing brickwork.
  • Fire and UV resistant.
  • Fully recyclable.
  • Minimal maintenance required.

Applications:

  • Conservation Cowled Vent: For bathrooms, cloakrooms, tumble dryer outlets, kitchens and all outlets and inlets where either a 4" (103 mm) ducting, or 5" (125 mm) ducting is used in listed buildings, restored/ conserved apartments, care homes, manor houses and farm houses.
  • Daisy (3" and 10"): Can be used in conjunction with cavity wall sleeves as interior vent grilles using single and double Windsor cast iron air bricks on the outside.
  • Heritage: Often used as a feature in drainage, garden landscaping and walkways.
  • Round, slotted: Useful for inserting (rebating) into wooden floors or into walls to provide combustion air for log burning stoves and larger grilles for drainage grating outside.
  • Square holes, made to measure: Suitable for use on castles, keeps and manor houses, as well as modern extensions and art galleries.
  • Westminster, 3" high slotted and Square, slotted: These can be used for ventilation of air (supply or exhaust) either in interiors or exterior to the property, and also exterior for drainage gratings.

General information

Finish

Painted (black)

RAL

Insert RAL code.

Red oxide primer

For application of own finish. Conservation only.

Standard (bare)

Lacquered

Daisy 10" only.

Material

Cast iron which has been cast in sand moulds

Uniclass 2015

Pr_70_65_04_03 Air grillesPrimary

CAWS

F30/15 Air bricks in external walling

F30/160 Air bricks in external walling

F30/165 Gratings/ ventilators in internal walling

Q10/312 Footway gratings

Specification data - Air grilles

Product Reference

Vent and Drainage Grilles

Type

3" high, slotted

Conservation Cowled Vent

Width (top): 155 mm; width (bottom): 180 mm; height: 140 mm; vent protrusion: 80 mm.

Daisy (3")

Custom length.

Daisy (10")

Heritage

Round, slotted

Square holes, made to measure

Available in short (up to 205 mm), medium (205–450 mm) and long (455–915 mm) lengths. Insert requirement.

Square, slotted

Westminster

Finish

Painted (black)

RAL

Insert RAL code.

Red oxide primer

For application of own finish. Conservation only.

Standard (bare)

Lacquered

Daisy 10" only.

Accessories/ Other requirements

Not required

Drill holes

Mesh

Standard product features

Material:

Cast iron which has been cast in sand moulds.

Product Options

Type:

Insert relevant code.

- 3" high, slotted:

11 mm vent size. 12 mm thickness.

  • Slot 33: 3 x 3" (85 x 75 mm). Air flow: 1800 mm². Weight: 0.3 kg.
  • Slot 453: 4.5 x 3" (110 x 75 mm). Air flow: 2200 mm². Weight: 0.4 kg.
  • Slot 53: 5 x 3" (130 x 75 mm). Air flow: 2700 mm². Weight: 0.5 kg.
  • Slot 63: 6 x 3" (115 x 75 mm). Air flow: 3300 mm². Weight: 0.7 kg.
  • Slot 73: 7 x 3" (180 x 75 mm). Air flow: 3850 mm². Weight: 0.75 kg.
  • Slot 83: 8 x 3" (205 x 75 mm). Air flow: 4400 mm². Weight: 0.8 kg.
  • Slot 93: 9 x 3" (225 x 75 mm). Air flow: 5000 mm². Weight: 1 kg.
  • Slot 103: 10 x 3" (257 x 75 mm). Air flow: 5500 mm². Weight: 1.1 kg.
  • Slot 113: 11 x 3" (280 x 75 mm). Air flow: 6050 mm². Weight: 1.2 kg.
  • Slot 123: 12 x 3" (304 x 75 mm). Air flow: 6600 mm². Weight: 1.3 kg.
  • Slot 153: 15 x 3" (380 x 75 mm). Air flow: 8500 mm². Weight: 1.6 kg.
  • Slot 183: 18 x 3" (450 x 75 mm). Air flow: 10 000 mm². Weight: 2 kg.
  • Slot 243: 24 x 3" (600 x 75 mm). Air flow: 13 000 mm². Weight: 2.5 kg.

- Conservation:

The cowl deflects the extracted air downwards, and is screwed into the wall through the 5 mm diameter countersunk screw holes in the lugs on each corner. The spigot at the back is designed to fit into a core drilled hole.

  • CON 4: Spigot: 4" (103 mm). Weight: 2.5 kg. Air flow: 7200 mm².
  • CON 5: Spigot: 5", (125 mm). Weight: 2.6 kg. Air flow: 8000 mm².

- Daisy (3"):

Length is determined by the amount of times the daisy pattern is repeated; see below.

  • DAY33: Patten repeat: 1. Size: 3 x 3" (70 x 75 mm). Air flow: 2000 mm² (1330 mm² with mesh).
  • DAY53: Patten repeat: 2. Size: 5 x 3" (135 x 75 mm). Air flow: 4000 mm² (2660 mm² with mesh).
  • DAY83: Patten repeat: 3. Size: 8 x 3" (197 x 75 mm). Air flow: 6000 mm² (4000 mm² with mesh).
  • DAY103: Patten repeat: 4. Size: 10 x 3" (263 x 75 mm). Air flow: 8000 mm² (5330 mm² with mesh).
  • DAY133: Patten repeat: 5. Size: 13 x 3" (328 x 75 mm). Air flow: 10 000 mm² (6660 mm² with mesh).
  • DAY153: Patten repeat: 6. Size: 15 x 3" (392 x 75 mm). Air flow: 12 000 mm² (8000 mm² with mesh).
  • DAY183: Patten repeat: 7. Size: 18 x 3" (455 x 75 mm). Air flow: 14 000 mm² (9330 mm² with mesh).
  • DAY213: Patten repeat: 8. Size: 21 x 3" (519 x 75 mm). Air flow: 16 000 mm² (10 660 mm² with mesh).
  • DAY233: Patten repeat: 9. Size: 23 x 3" (584 x 75 mm). Air flow: 18 000 mm² (12 000 mm² with mesh).

- Daisy (10"):

  • DAY104: 10 x 4" (267 x 95 mm). Air flow: 6900 mm² (4500 mm² with mesh). Thickness: 10 mm. Weight: 1.2 kg.
  • DAY107: 10 x 7" (267 x 170 mm). Air flow: 13 800 mm² (9100 mm² with mesh). Thickness: 10 mm. Weight: 2 kg.

- Heritage:

  • HER6: 6 x 6" (153 x 153 mm). Air flow: 6500 mm². Thickness: 9 mm. Weight: 1 kg.
  • HER7: 7 x 7" (176 x 176 mm). Air flow: 10 000 mm². Thickness: 11 mm. Weight: 2 kg.
  • HER8: 8 x 8" (200 x 200 mm). Air flow: 14 000 mm². Thickness: 11 mm. Weight: 3 kg.
  • HER9: 9 x 9" (229 x 229 mm). Air flow: 16 000 mm². Thickness: 11 mm. Weight: 3.2 kg.
  • HER12: 12 x 12" (305 x 305 mm). Air flow: 30 000 mm². Thickness: 10 mm. Weight: 4 kg.
  • HER15: 15 x 15" (380 x 380 mm). Air flow: 45 000 mm². Thickness: 12 mm. Weight: 8 kg.
  • HER18: 18 x 18" (457 x 457 mm). Air flow: 68 000 mm². Thickness: 11 mm. Weight: 10 kg.
  • HER20: 20 x 20" (507 x 507 mm). Air flow: 80 000 mm². Thickness: 11 mm. Weight: 12 kg.
  • HER96: 9 x 6" (224 x 149 mm). Air flow: 12 000 mm². Thickness: 9 mm. Weight: 1.5 kg.
  • HER126: 12 x 6" (305 x 150 mm). Air flow: 15 000 mm². Thickness: 11 mm. Weight: 2.5 kg.
  • HER129: 12 x 9" (305 x 23 mm). Air flow: 28 000 mm². Thickness: 11 mm. Weight: 3.7 kg.

- Round, slotted:

  • RO3: 3" (75 mm). Slot size: 9 mm. Air flow: 1200 mm². Thickness: 3/8". Weight: 0.2 kg.
  • RO35: 3.5" (88 mm). Slot size: 12 mm. Air flow: 1700 mm². Thickness: 1/2". Weight: 0.4 kg.
  • RO4: 4" (100 mm). Slot size: 12 mm. Air flow: 2500 mm². Thickness: 3/8". Weight: 0.3 kg.
  • RO45: 4.5" (115 mm). Slot size: 14 mm. Air flow: 3500 mm². Thickness: 3/8". Weight: 0.4 kg.
  • RO5: 5" (125 mm). Slot size: 12 mm. Air flow: 4000 mm². Thickness: 3/8". Weight: 0.5 kg.
  • RO6: 6" (150 mm). Slot size: 12 mm. Air flow: 6500 mm². Thickness: 3/8". Weight: 0.75 kg.
  • RO7: 7" (178 mm). Slot size: 12 mm. Air flow: 9000 mm². Thickness: 3/8". Weight: 1 kg.
  • RO8: 8" (197 mm). Slot size: 13 mm. Air flow: 12 000 mm². Thickness: 3/8". Weight: 1.5 kg.
  • RO9: 9" (225 mm). Slot size: 13 mm. Air flow: 14 000 mm². Thickness: 1/2". Weight: 2 kg.
  • RO12: 12" (305 mm). Slot size: 15 mm. Air flow: 25 000 mm². Thickness: 5/8". Weight: 6 kg.

- Square holes, made to measure:

Includes various lengths ranging from 50–900 mm, cut to order from stock material.

  • MTM4: Height: 4" (100 mm). Border: 10 mm (top/ bottom), 4 mm (end). Row of holes: 5. Hole size: 10 mm. Plate thickness: 9 mm.
  • MTM5: Height: 5" (127 mm). Border: 15 mm (top/ bottom), 4 mm (end). Row of holes: 5. Hole size: 14 mm. Plate thickness: 14 mm.
  • MTM6: Height: 6" (152 mm). Border: 18 mm (top/ bottom), 5 mm (end). Row of holes: 6. Hole size: 13 mm. Plate thickness: 12 mm.
  • MTM7: Height: 7" (178 mm). Border: 11 mm (top/ bottom), 5 mm (end). Row of holes: 8. Hole size: 14 mm. Plate thickness: 12 mm.
  • MTM8: Height: 8" (200 mm). Border: 16 mm (top/ bottom), 6 mm (end). Row of holes: 8. Hole size: 15 mm. Plate thickness: 12 mm.
  • MTM9: Height: 9" (227 mm). Border: 10 mm (top/ bottom), 6 mm (end). Row of holes: 10. Hole size: 15 mm. Plate thickness: 12 mm.
  • MTM10: Height: 10" (253 mm). Border: 21 mm (top/ bottom), 6 mm (end). Row of holes: 10. Hole size: 15 mm. Plate thickness: 13 mm.
  • MTM11: Height: 11" (273 mm). Border: 20 mm (top/ bottom), 6 mm (end). Row of holes: 11. Hole size: 15 mm. Plate thickness: 13 mm.
  • MTM12: Height: 12" (300 mm). Border: 15 mm (top/ bottom), 7 mm (end). Row of holes: 13. Hole size: 14 mm. Plate thickness: 12 mm.
  • MTM15: Height: 15" (380 mm). Border: 13 mm (top/ bottom), 6 mm (end). Row of holes: 17. Hole size: 15 mm. Plate thickness: 14 mm.

- Square, slotted:

Can be fitted with the slots either horizontally or vertically. Horizontal slots allow for less rainwater access as the horizontal ribs act as louvres.

  • Slot 4: 4 x 4" (100 x 100 mm). Vent size: 10 mm. Air flow: 3000 mm². Plate thickness: 9 mm. Weight: 0.5 kg.
  • Slot 5: 5 x 5" (125 x 125 mm). Vent size: 8 mm. Air flow: 5000 mm². Plate thickness: 9 mm. Weight: 0.7 kg.
  • Slot 6: 6 x 6" (150 x 150 mm). Vent size: 10 mm. Air flow: 8750 mm². Plate thickness: 9 mm. Weight: 0.8 kg.
  • Slot 7: 7 x 7" (175 x 175 mm). Vent size: 14 mm. Air flow: 11 000 mm². Plate thickness: 11 mm. Weight: 1.5 kg.
  • Slot 8: 8 x 8" (200 x 200 mm). Vent size: 8 mm. Air flow: 14 500 mm². Plate thickness: 9 mm. Weight: 2 kg.
  • Slot 9: 9 x 9" (225 x 225 mm). Vent size: 13 mm. Air flow: 20 000 mm². Plate thickness: 12 mm. Weight: 2.6 kg.
  • Slot 12: 12 x 12" (305 x 305 mm). Vent size: 14 mm. Air flow: 41 000 mm². Plate thickness: 12 mm. Weight: 5 kg.

- Westminster:

Can be used either screwed over a hole (drilled) or mortared in a rebate or within a hole void (undrilled). 10 mm thickness.

  • WEST4: 4 x 4" (108 x 108 mm). Weight: 1 kg. Air flow: 3000 mm².
  • WEST64: 6 x 4" (152 x 108 mm). Weight: 1.2 kg. Air flow: 4000 mm².
  • WEST124: 12 x 4" (295 x 108 mm). Weight: 2 kg. Air flow: 8000 mm².

See manufacturer's literature for further details on each variant.

Finish:

Certain finishes are only available with certain variants; consult manufacturer for details.

- Painted (black):

Uses a three-part epoxy primer, followed by two-part epoxy black gloss top coat which is extremely hard wearing.

- Standard (bare):

Will rust to leave a natural brown coating of iron oxide, which will protect the grille from further corrosion.

Accessories/ Other requirements:

  • Mesh - suitable for flyscreen on grilles used for ventilation (not for drainage grilles).
  • Only available for certain variants; consult manufacturer for details.

Literature

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