I am sorry no one has gotten back to you on this just yet. I am going to check into this for you and get back to you. For now, you can review the data sheets:
Ok.... Updated info...
With minimal interference, about 2500-3000 sq foot area with the built inomni-directionalantenna, which translates to about 35-50 feet fromcenter. Please keep in mind there are some factors that may make this slightly larger or smaller. It is best to get a predictive heat map so you know that the AP's are covering everything you need to.
On the other hand...thebig brother to the 1920's- the 1925's with the external antennas and the options for different antennas like a high gain industrial patch or omni will give you better coverage. Again, the heat map would help you here too.
Of course thesedo not come with any antennas. The antennas that are normally sold with the 1940's are (and will give you similar pattern as the 1920):
With this set of antennas, I was told that you can get from 50-60 feet from center with min interference with good throughput.
If you use a more specialized antenna, you can increase the coverage and distance. We normally suggest Terrawave or some others for antenna choices for outdoors....makes a big difference.
If you are working on projector plan to do so in the future, and could use further help with the heat map, and questions, please feel free to contact us and it would be our pleasure to help you.
I hope this helped!
I am marking this question as Assumed Answered based on John's response.
If you have more questions or information to add, please don't hesitate to respond to this post.