70mm Circular Soffit Vent - Black

SKU: C267Z

Easy Installation: Push-twist fitting into a 70mm drilled hole—ideal for new builds or retrofitting existing soffits.
Flexible Airflow Options: Spacing at 200mm for 10mm airflow or 86mm (staggered) for 25mm airflow.
Pest Prevention: Designed to block entry of large insects into the eaves while allowing ventilation.
Durable & Low Maintenance: Built to withstand outdoor conditions without warping or cracking.
Versatile Application: Suitable for a wide range of soffit board types and property styles.

Description

70mm Black Circular Soffit Vent

Efficient airflow with insect protection – for new builds or retrofits

The 70mm Black Circular Soffit Vent provides a simple, effective solution for ventilating roof eaves. Designed for both new build and retrofit applications, it can be easily slotted into soffit boards to ensure continuous airflow into the roof space, helping to prevent condensation and moisture build-up.

🛠 Product Details:

Fitting Hole Size: Ø70mm
Material: Durable uPVC
Colour: Black
Fixing Method: Push-twist fit
Insect Protection: Slots sized to prevent entry of large insects

✅ Key Features:

Easy Installation – Simply push-fit into a 70mm drilled hole
Flexible Application – Can be installed before or after soffit boards are fitted
Effective Ventilation – Promotes healthy airflow into eaves and roof voids
Insect Guard – Evenly spaced slots block large insects while allowing air to flow freely
Weather-Resistant Finish – Anthracite grey colour complements modern soffit styles

📏 Airflow Guidelines:

10,000mm²/m Free Airflow – Space vents at 200mm centres
25,000mm²/m Free Airflow – Space vents at 86mm staggered centres

The G700 Black Circular Soffit Vent is a cost-effective, low-maintenance way to improve roof ventilation and protect your property from damp-related damage. Ideal for builders, roofers, and DIY installations alike.

Technical Information

Size: Ø80 x 16mm
Delivery: 1-2 Working Days
Brand Name: Manthorpe
Colour: Black
Material: Polypropylene
Spacing for 10mm Airflow: 200mm
Lead Time: In Stock

Delivery & Returns

Delivery

The despatch timings we publish are estimates and due consideration needs to be made when making purchases with tight deadlines and as such we shall not be liable for any losses, costs, damages, charges, or expenses caused by any delay for delivery of the goods.

Returns Policy For Brissco Online

We appreciate that there may be occasions you may wish to return items. To help you with this process please see our returns policy below.

Returning an item – Damaged

In the event you receive damaged goods we will arrange a replacement item for you. However, it is your responsibility to notify us within 72 hours of receipt that an item has been received damaged (please see risk below).

Returning an item – Risk

On receipt of the delivery you, the customer, are responsible for those goods and any loss or damage to the goods shall be at your own risk.

Returning an item – Incorrect

If you receive incorrect goods it is your responsibility to notify us within 72 hours of receipt at which point we will make the necessary arrangements.

Delivery shortages

Firstly, our carrier delivers parcels/packages. Any shortages of them must be reported to the driver on receipt. Secondly, shortages of contents of the parcel(s)/package(s) against the enclosed Brissco advice note must be made within 72 hours.

PDFs

FAQs

1. What is the 70mm Circular Soffit Vent used for?

It is designed to provide ventilation to the eaves of a roof, helping to prevent condensation and maintain airflow in loft spaces.

2. Can this vent be used for both new builds and retrofits?

Yes, it can be fitted before soffit boards are installed in new builds or retro-fitted into existing soffits.

3. What size hole is required for installation?

A 70mm (2.75”) diameter hole should be drilled into the soffit board to accommodate the vent.

4. How is the vent installed?

It uses a simple push-twist fitting method for quick and secure installation.

5. What airflow can this vent achieve?

For 10,000mm²/m of free airflow, vents should be spaced at 200mm centres. For 25,000mm²/m of free airflow, they should be fitted at 86mm staggered centres.

6. Does the vent help keep out insects?

Yes, the evenly spaced slots are designed to prevent large insects from entering while still allowing sufficient airflow.

7. Will the slots get blocked easily?

No, the slots are wide enough to avoid blockage from debris, paint, or water droplets.

8. Is this vent suitable for all soffit materials?

Yes, it can be installed into most soffit boards that can be drilled to the correct hole size.

9. Does the vent comply with ventilation standards?

Yes, when fitted at the recommended spacing, it meets standard airflow requirements for roof ventilation.

10. What is the main benefit of using this soffit vent?

It provides a quick, effective, and insect-resistant way to improve roof ventilation, helping to protect the roof space from damp and condensation.