Through-wall vent set for background ventilation and heat-producing appliances. Includes baffle to reduce cold draughts. Terracotta finish suits traditional brick and render. Suitable for 127mm x 350mm openings.
The Timloc Aero Core terracotta through-wall vent set is a complete combination ventilator designed to provide background ventilation while keeping the cold air out. Where a lot of single-component vents fall short, this set includes a baffle, which means air can circulate without that familiar howling draught every time there’s a gust outside. It’s the kind of detail that makes a real difference once the job’s done and someone’s actually living in the building.
The terracotta finish makes it a straightforward match for traditional brick or red-toned rendered walls. No painting, no fiddling. It looks like it belongs there, which on a period property or a conventional brick-built home is exactly what you want.
Where the Timloc Through-Wall Vent Set Gets Used
This vent set is designed for walls where you need consistent background ventilation, particularly near heat-producing appliances such as gas fires, boilers, and solid fuel stoves. Building regulations require adequate combustion air supply to these appliances, and a properly fitted through-wall vent is one of the most reliable ways to meet that requirement without relying on gaps in the fabric of the building.
It’s also widely used for general background ventilation in habitable rooms, utility areas, and subfloor voids where air movement matters but draught control is equally important. The Aero Core baffle system sits within the wall thickness and disrupts direct airflow, significantly reducing cold draughts while still allowing free passage of air in the volumes required.
The Baffle and Why It Matters
Without a baffle, a through-wall vent is essentially a hole in your wall. Fine in theory for air movement, less fine when the wind picks up and you can feel a chill three metres into the room. The baffle in this set sits within the duct to break up direct airflow, which means you get the ventilation performance without the discomfort. It’s a small thing that installers often overlook when specifying vents, and their customers notice.
The set comes in a 127mm x 350mm configuration and includes the internal and external grille components along with the baffle section, making it a complete solution rather than a collection of parts to source separately. Terracotta colouring is consistent throughout, so even if the grille edges are visible from outside, it reads as a neat, considered finish rather than an afterthought.
Pro Tip: When fitting the baffle section, ensure it's positioned centrally within the wall depth so airflow is disrupted evenly across the duct opening rather than deflected to one side, which can cause uneven ventilation and unnecessary noise.
Through-wall vent sets like this are used across new build and renovation work wherever a permanent, controllable ventilation path is needed. Common locations include rooms with gas fires, solid fuel appliances, and wood-burning stoves where combustion air supply is a regulatory requirement. They're also fitted in utility rooms, larders, and below-ground or subfloor areas where moisture management and airflow matter. On traditional brick properties, the terracotta finish means the external grille blends cleanly without any additional treatment.
Best For
Background ventilation in habitable rooms
Combustion air supply to gas and solid fuel appliances
Subfloor and underfloor void ventilation
Utility rooms and larders
Traditional brick and terracotta-toned rendered walls
Works With
127mm x 350mm wall openings
Standard brick and blockwork walls
Rendered and masonry walls
Gas fires and solid fuel appliance installations
Key Features
Includes anti-draught baffle
Terracotta colour finish
Complete set: internal grille, external grille and baffle
Designed for through-wall installation
Suitable for heat-producing appliance ventilation requirements
Not suitable for: Not suitable for use as a sole ventilation source for high-output appliances requiring dedicated flue or extract systems. Not intended for use in cavity walls without appropriate sleeving.
Cut or core a clean opening in the wall to the correct dimensions before fitting. The duct section and baffle should be installed within the wall thickness, with the baffle centred to ensure even airflow distribution. Secure the internal and external grilles to the wall faces using appropriate fixings for the substrate.
Check the orientation of the baffle before fitting as most are designed to deflect airflow downward internally, reducing draughts at floor level. Seal around the external grille frame with a suitable weather-resistant sealant to prevent water ingress around the edges.
Mark and cut or core the wall opening to 127mm x 350mm, ensuring clean, square edges
Dry-fit the duct sleeve and baffle section to confirm correct wall depth and alignment
Insert the baffle section into the duct, centred within the wall thickness
Fix the external grille to the outside face of the wall using appropriate masonry fixings
Seal around the external grille frame with weather-resistant sealant
Fit the internal grille to the inside wall face and secure with fixings
Check airflow is unobstructed and the baffle is deflecting correctly before finishing
Does this vent set include everything needed for installation?
Yes, the set includes the internal grille, external grille, and baffle section, so you have the complete through-wall assembly. You will need to supply your own fixings and sealant appropriate to your wall type.
Is this vent suitable for use with a wood-burning stove or solid fuel appliance?
Yes, the Aero Core through-wall vent set is designed for use with heat-producing appliances including solid fuel stoves and gas fires, providing the background combustion air supply required under building regulations. Always confirm the required free area with your appliance installation instructions.
Will the terracotta finish fade or need repainting over time?
The terracotta colour is inherent to the material rather than a surface coating, so it should not peel or require repainting. Some weathering is normal on external grilles over time, but it should remain a reasonable colour match without any maintenance.
The Timloc Aero Core vent set is manufactured from UV-stabilised plastic with a terracotta pigment suitable for external and internal exposure. The baffle is designed to interrupt direct airflow through the duct, reducing cold draught penetration without significantly restricting the free ventilation area. The set is sized for a 127mm x 350mm wall opening and is compliant with the ventilation requirements relevant to background and combustion air applications.
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