Build your own airtightness in-window fan: Supercharge your retrofit!

Funded by Cambridge City Council.

Join this practical workshop to make your own airtightness in-window fan which does the basic job of a Blower Door test at a fraction of the cost. You will leave with your own measurement tool and the skills and confidence to use it to find the hidden leaks in your property and make your home more airtight.

We also offer FREE observer places for this workshop for people to gain information and understanding of airtightness and how to test for it.

We supply all the PAT tested, CE rated components and tools plus the training support to help you make and use your own airtightness measurement tool.

Cost to fan build attendee: £200 (this fee covers the cost of components to make the fan)

This workshop is great for the DIYer or teaching your builder to build airtight on the job. Commercial in-window airtightness fans are available to buy, for around £1400. Why not build your own and learn how to use it in our workshop for £200.

So what is this fan and why is it useful. Watch this 2 minute video to find out:

Know what’s Happening Next — before everyone else does.

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Host or Publisher Cambridge Retrofit Hub, community benefit society