I was thinking more this size:Suction Blowers – SUC and SupraVac
With our range of SUC suction blowers, all needs for both farming and industrial use are met. From low capacity on-farm installations to high-capacity mobile systems.kongskilde-industries.com
Simple workshop vacuum cleaner works well. I have a sealy one sold for ash removal but the bucket is only held on with 2 fold over clips then you can pour the contents into your hopper. Think it cost 70 quid.I was thinking more this size: