

🏢 Upgrade your airflow game—vent smarter, not harder!
The 2447B 100mm Round Cowled Through Wall Duct Vent Kit by National Ventilation is a complete, easy-to-install ventilation solution designed for upper floors and high-rise buildings. Featuring a 104mm diameter duct and a 350mm pipe length, it allows safe installation from inside, saving time and avoiding external scaffolding. The kit includes all necessary components—round cowl, rubber sealing gasket, pipe, and wall plate—ensuring a durable, efficient, and professional finish.
| Manufacturer | National Ventilation |
| Part Number | National Ventilation |
| Package Dimensions | 49.6 x 16.5 x 12.1 cm; 480 g |
| Item model number | National Ventilation |
| Colour | Brown |
| Material | rubber |
| Item Package Quantity | 1 |
| Batteries included? | No |
| Batteries Required? | No |
| Item Weight | 480 g |
A**R
Easy to apply
Great bit of kit, once the hole has been bored its easy to fit.
J**C
Perfect!
Makes life easy! No ladders needed
J**S
Safety
These work. Use the correct size core drill and they do the job saving a tricky operation at the top of a ladder
C**K
Excellent
Used just to mask a hole rather than replacing with new cladding, does the job!
S**K
Great idea
I bought 3 of these, as I could not access from the outside.Bought a 108mm core and drilled the holes from inside..This item was good but the rubber seal should not fit and kept getting pushed back.Ended up installing without the rubber - hopefully it will be okay - was a tight snug fit.
D**D
Good product
Worked a treat and was very easy to install
A**R
Great idea but badly damaged when delivered
Quick and easy to fit but the external part of vent had large cracks in it. I only bought as a temp vent so fitted it but not what I paid for
A**N
Value for money
Customer if mine
Trustpilot
2 weeks ago
1 month ago