I would also suggest getting a professional wireless site survey performed.  It's not just the interference from your own devices that needs to be considered, but also that coming from neighbouring AP's in nearby building/office floors.     I have found in the past that the Meraki auto ordering of channels does not always work as well as it should, and manually setting them can prove more successful.     As always proper planning prior to deployment can aleviate problems further down the line. ... View more