Timloc Aero Core through wall ventilation set with cowl and baffle for background ventilation and heat-producing appliances. Supplied in brown to suit common brick and render finishes.
The Timloc brown through wall vent cowl is a complete ventilation set comprising an external cowl and internal baffle, designed for through-wall installation where background ventilation is needed. These are a common requirement around boilers, gas fires, and other heat-producing appliances, as well as for general background ventilation in rooms where airflow is restricted. One product, two components, sorted.
Timloc have been making ventilation components for UK construction for a long time, and the Aero Core range reflects that experience. The cowl sits on the external face, directing airflow while keeping rain and debris out. The baffle fits internally, managing the airflow and reducing unwanted cold draughts without blocking ventilation entirely. That combination is what makes it a practical choice over a basic single-piece vent, particularly in exposed locations where wind-driven rain is a genuine concern.
Where the Timloc Aero Core Through Wall Vent Gets Used
This type of ventilator set is specified regularly by builders and heating engineers when installing solid fuel appliances, gas fires, and back boilers that require a dedicated air supply. Building regulations require permanent ventilation openings for many appliance types, and a through-wall cowl and baffle set is one of the most straightforward ways to meet that requirement without a visible hit to the finished look of the room. The brown colour suits common brick tones and blended render finishes without standing out.
The unit is also used for background ventilation in kitchens, utility rooms, and bathrooms where natural airflow is required but passive wall vents have proven too draughty in colder months. The baffle component handles that balance reasonably well, allowing air movement while cutting down on the direct cold air channel that a simple sleeve vent would create.
Anti-Draught Performance
The Aero Core baffle is the key feature here. It breaks up the direct airflow path through the wall, reducing the chimney effect that can make a simple sleeved vent uncomfortable in winter. That said, this is not a sealed unit — it is a ventilator. Permanent background ventilation is what it provides, and that is precisely what makes it suitable for use with gas and solid fuel appliances where air supply requirements must not be blocked.
At this price point, it represents solid value for a compliant, finished installation without needing to source the cowl and baffle separately from different suppliers.
Pro Tip: When core drilling for through-wall vents, always check both faces of the wall for services before you start and use a slightly larger core than the sleeve outer diameter to allow for rake and mortar bedding on the external cowl seating.
Through-wall ventilation sets like this are used wherever a permanent ventilation opening is required through a masonry or block wall. Gas fires, solid fuel stoves, back boilers, and other heat-producing appliances commonly need a dedicated air supply that meets building regulations requirements. Heating engineers, gas safe installers, and general builders fit these regularly as part of appliance installations. They are also used for background ventilation in kitchens and utility rooms where a degree of draught control is needed alongside the ventilation requirement.
Best For
Gas fire and solid fuel appliance air supply
Background ventilation in kitchens and utility rooms
Boiler and back boiler installations
Through-wall ventilation in masonry construction
Compliant permanent ventilation openings
Works With
Standard through-wall core drilled sleeves
Brick, block and rendered masonry walls
Gas and solid fuel heating appliances
New build and retrofit installations
Key Features
External cowl with rain and debris deflection
Internal anti-draught baffle
Brown finish for common brick and render tones
Two-component set supplied together
Suitable for heat-producing appliance ventilation
Not suitable for: Not suitable for use as a blocked or closeable vent where an appliance requires a permanent unobstructed air supply. This is a permanent background ventilator, not a controllable or lockable vent.
Core drill through the wall at the required diameter to suit the sleeve or liner being used. Ensure the core is drilled with a slight fall to the outside to aid drainage. Fit the external cowl to the outer face of the wall, bedding it into mortar or suitable external sealant for a weathertight finish. Run the sleeve through the core and connect to the internal baffle fitting.
The internal baffle should be fitted flush to the internal wall face. Check that the airflow path is clear through both components before making good around either fitting. Do not pack insulation or filler into the core around the sleeve in a way that restricts the ventilation cross-section required by the appliance manufacturer or building regulations specification.
Confirm the required ventilation free area for the appliance or regulation being met before selecting core size
Core drill through the wall at the correct diameter, angled slightly downward toward the external face
Clear all debris from the core and check the sleeve fits without binding
Bed the external brown cowl to the outer wall face using mortar or external sealant, ensuring a weathertight seal
Pass the sleeve through the core and seat it correctly within the cowl
Fit the internal baffle to the inner wall face, ensuring it is flush and secure
Check airflow is unobstructed through both components before making good
Make good around both fittings internally and externally without restricting the ventilation opening
Is this ventilation set suitable for use with a gas fire or solid fuel stove?
Yes, this type of through-wall cowl and baffle set is commonly used to provide the permanent air supply required for gas fires, solid fuel stoves, and other heat-producing appliances. Always confirm the free air area of the vent meets the appliance manufacturer's specification and any applicable building regulations requirements before installation.
Will the brown colour match standard brick?
The brown finish is designed to sit reasonably well against common brick and blended render finishes. It will not be a perfect match to every brick colour, but it is a far less conspicuous option than white on a traditional brick elevation. If appearance is critical, check the colour against your specific brick tone before fitting.
Does the baffle completely stop draughts?
The baffle significantly reduces the direct cold air channel that a plain sleeved vent creates, but this is a permanent ventilator, not a draught excluder. Some airflow will always pass through. That is intentional and necessary, particularly where the vent is serving a gas or solid fuel appliance that requires a permanent unobstructed air supply.
The Timloc Aero Core ventilation set is manufactured from uPVC, standard for this type of external and internal ventilation fitting given its resistance to moisture, temperature cycling, and general weathering. The external cowl is profiled to deflect rain away from the core opening, while the internal baffle interrupts the direct airflow path to reduce draught. Supplied as a matched set to ensure compatibility between the two components.
Colour
Brown
Material
uPVC
Components
External cowl and internal baffle
Application
Through-wall background and appliance ventilation
SKU
LOCACV7CBR
Brand
Timloc
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