Question about wireless area coverage for a warehouse

I am adding a wireless network to a companies back warehouse and putting a sonicwall firewall in as the main wireless for office workers.  So 5 Total access points to get on their wireless network.

The warehouse:
25-30' Ceilings
180" wide x 240" deep
Power in the ceiling but the WAPS I purchased have PoE injectors

The office:
180" wide x 80" deep
The server rack will be near the back of the office closer to the warehouse than the front of the office.

Each WAP will have same SSID, Password and different channel.  I planned on doing 2.4 ghz but read there may be interference when the person with laptop or ipad is walking around to different parts of the warehouse.  Connection reliability is a bigger concern than speed.  I purchased 4 x Engenius long range 5ghz Wireless Access points (linked at the bottom).  I figured cut the warehouse into 4 quadrants and place a WAP in the middle of each quadrant.  

-Will choosing the 5 GH zwaps make my range suffer too much?

- Is there any other disadvantage going 5 GHz WAPs?  

- Is there a design that would allow me to use 4 WAPS in that small of a warehouse on 2.4 GHz Freq? What would it look like physically and channel wise?

-Does PoE work effectively at or around 250 ft?  If not I can just run hard power to the two farther WAPS.


Thanks a lot ahead of time.  If I missed anything important let me know!



http://www.amazon.com/EnGenius-Technologies-Wireless-Access-ENS500EXT/dp/B00BOVOMAS/ref=sr_1_5?ie=UTF8&qid=1381236949&sr=8-5&keywords=engenius+5+ghz
OHarrisNetworksAsked:
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Blue Street TechLast KnightCommented:
Hi OHarrisNetworks,

-Will choosing the 5 GH zwaps make my range suffer too much?
Yes, the higher the frequency of a wireless signal, the shorter its range. Thus, 2.4 GHz networks cover a substantially larger range than 5 GHz wireless networks. In particular, the higher frequency wireless signals of 5 GHz networks do not penetrate solid objects nearly as well as do 2.4 GHz signals, limiting their reach inside homes and office walls. 2.4 GHz has the advantage here in terms of range.

- Is there any other disadvantage going 5 GHz WAPs?
There are pros to both frequencies but to take advantage of the best of both go with a dual band WiFi. What model is the SonicWALLs? Have you considered SonicPoints (http://www.sonicwall.com/us/en/products/Clean_Wireless_Series.html#tab=Compare)?

- Is there a design that would allow me to use 4 WAPS in that small of a warehouse on 2.4 GHz Freq? What would it look like physically and channel wise?
I'd use a WLAN Coverage Estimator tool to plan & plot my WAP layout in terms of position and how many are needed to accurately provide the coverage desired: http://www.airtightnetworks.com/home/solutions/80211n/80211n-wlan-coverage-estimator.html

-Does PoE work effectively at or around 250 ft?  If not I can just run hard power to the two farther WAPS.
Yes, PoE can work up to 328 ft. And if you have a run longer just buy a PoE Extender like this: http://www.veracityglobal.com/products/ethernet-and-poe-extension/outreach-max.aspx

Hope that helps! Let me konw if you have any more questions.
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Blue Street TechLast KnightCommented:
Glad I could help, thanks for the points!
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