Okay, Fritters - I need your help

Who owns one of these and how quiet is it

I need to sort out an extraction unit for an event that I am organising ( we are going to be burning small amounts of sandalwood as part of a ceremony ) and I would like to know exactly how noisy this is ? Prayers are going to be taking place at the same time as the burning of the Sandalwood, and it is quite important that the extraction unit does not drown out the prayers.
What do you think, could I use one of these units or do you think it would be too noisy ? It seems ideal as it is portable and I could use it afterwards....
Having a bit of a nightmare trying to sort this out......
Thanks for you help.
K
xx