@Marketroid 

From the picture, we can see that the area with the best signal is 60, when it is about 74 degrees, the signal will be a little weaker. So if it is 80 degrees in your area, the clients can still access the internet, but they will not have the best signal. So please make sure that the clients are not far away from the AP. 

Sorry to bump this old thread @jonas.

Also calling in expertize of @Fae  and @R1D2 .

What AP power level was assumed for these recommendations?

What frequency band was used for these recommendations?

What client device was used for these numbers?

Looking for numbers for 5GHz band (UNII-1 and UNII-3), with medium power on EAP225 and for a typical Smartphone (Apple, Samsung) in a larger mostly open area with average AP height of 6 meters and estimated 40 APs (AP to AP distance of about 70 feet). Looking to only provide about 10Mbps up and down speeds.

Thanks

@R1D2 

Yes I can understand that attenuation does not change, but they were talking about 15 meters range and having smartphones having difficult time at that range, so they must be talking of absolute signal level as well.

I can assume that these figures are for 2.4Ghz and with default high power. My own but couple of years old experience using Cisco 1800 series APs mounted at about 20 feet high in such environment with 17dBm power (using UNII-3 channels, power level 1 (max), which also has higher power in North America, but UNII-1 channels at least in Cisco level 1 is like 11dBm), was that I could get about 50 feet (was with Samsung Note 8). I do find that iPhones have issues in connecting with 5GHz unless they really have signal level better than -70dBm. So I was assuming 40 feet will be better range to ensure best coverage when set to medium power. I cannot go to test (COVID issues and building closed) and have to provide my ballpark figures. So I arrived at 40 APs with AP to AP distance of about 70 feet.

Thanks

@R1D2

yes I fully understand that there are so many variables, but for planning purposes, to even get a budgetary numbers, we need to start somewhere. Sure I can use Ekahau Pro planning tool, but I was trying to see if someone had already deployed and what their findings in the field are. If building was open I would have gone there with a tech to mount the AP up at 2 feet and then measure around with a typical cell phone and then installed two more APs around and then test some roaming around also with AP to AP distance of about 70 feet.

I think for now, I am going to stick with my plan of about 40 APs to provide smartphone grade 10Mbps speeds.

Thanks again for your excellent help.

So just that you know: I'm using two EAP 245 in my house in a wall-mount configuration. It is a shame that tp-link does not provide an official wall mounting access point with similar throughput rates. Anyhow, I find the coverage even "behind" the EAP 245 decent.

However, I wondered what the best position for an EAP is, as I bought a third one for my workshop, where the house's AP's signal is not sufficient anymore on 5Ghz.

Judging from the picture on the first page, I think using the EAP on the wall is still the best solution if the ceiling height is not that big (2.25m in my small workshop).