Can You Have Too Many Wi-Fi Access Points?
Can too many Wi-Fi access points slow down your network? Discover how interference, poor placement and channel planning can affect your business Wi-Fi.
How Many Wi-Fi Access Points is Too Many?
The number of Access Points alone doesn’t determine whether a network is well designed.
It is possible to have too many Wi-Fi Access Points. Installing additional Access Points without proper planning can increase interference, create unnecessary competition for wireless airtime and potentially reduce your network performance.
Office Managers, Facilities Managers and even IT Managers can often assume that weak or unreliable Wi-Fi means they must need additional Access Points.
This assumption is completely understandable because:
- More Access Points should theoretically provide more coverage.
- Additional APs can help eliminate areas with weak signals.
- Wi-Fi equipment is increasingly affordable and relatively straightforward to install.
- Many business networking products advertise simple installation and automatic optimisation.
However, Wi-Fi is fundamentally different from a wired network.
When additional Ethernet ports are installed, each connected device generally receives its own dedicated switched connection.
Wireless devices, by comparison, must share a limited amount of radio spectrum.
Adding another Access Point doesn’t automatically create more usable wireless capacity, particularly when nearby Access Points are operating on the same channels.
Real-World Example of Why More AP’s Doesn’t Mean Better Wi-Fi
Let’s take you through a real-world example. Imagine you’re working in a small office and the staff are experiencing slow Wi-Fi.
The business has four Access Points and decides to install another four.
Although signal strength might improve in some locations, the additional APs could increase competition for the available wireless channels.
If the original problem was already caused by excessive channel utilisation, the additional equipment might actually make matters even worse.
Understanding why this happens requires looking at how Wi-Fi Access Points communicate and share radio spectrum.
What Happens When You Install Too Many Wi-Fi Access Points?
Installing too many Access Points without proper planning can cause various issues with your wireless network. When installing Access Points to your business Wi-Fi network, it’s important to consider a number of factors.
Co-Channel Interference: When Access Points Share the Same Channel
Wi-Fi Access Points operating on the same channel within radio range generally have to share the available airtime.
Wi-Fi uses mechanisms designed to reduce simultaneous transmissions on the same channel.
When an Access Point or wireless client detects that the channel is busy, it may need to wait before transmitting.
Multiple Access Points can operate on the same channel. In larger networks, this is normal. However, any Access Points and clients sharing a channel may compete for airtime. As the number of active devices increases, available transmission opportunities become more limited. This can increase latency and reduce throughput.
Co-channel interference is caused when more than one Access Point is contending for the same channel. Generally speaking, devices that can detect one another can coordinate access to the channel rather than just corrupting each other’s transmissions. But, excessive contention between Access Points can significantly affect your Wi-Fi performance.
Real World Example of Too Many AP’s Sharing the Same Channel
Imagine your office has three Access Points operating on the same 5 GHz channel.
If all three are within radio range and serving busy clients, they may effectively be sharing the available channel airtime.
Adding another Access Point to that same channel doesn’t automatically provide another channel’s worth of capacity.
It may simply introduce another set of devices competing for the existing airtime.
Adjacent-Channel Interference: When Channels Overlap
Adjacent-channel interference is different from co-channel contention.
It occurs when transmissions on overlapping or insufficiently separated channels interfere with one another.
This can be particularly problematic because devices may not coordinate their transmissions effectively.
Key points to consider with Adjacent-Channel Interference:
- Wi-Fi channels occupy portions of the radio spectrum.
- Some channel configurations overlap.
- Wider channels consume more spectrum.
- Poor channel planning can increase interference.
- Interference can cause retransmissions and reduce usable throughput.
The problem with 2.4 GHz
The 2.4 GHz band provides relatively little usable spectrum.
In the UK, channels 1, 6 and 11 are a commonly used non-overlapping arrangement for 20 MHz Wi-Fi channels.
Installing numerous Access Points using inappropriate channel configurations can create unnecessary interference.
Using 40 MHz channels on 2.4 GHz is generally undesirable in typical business environments because it consumes much of the available spectrum.
5 GHz and 6 GHz Channels
These bands offer additional channel-planning opportunities, but they’re not unlimited resources.
In particular:
- Channel width affects how many independent channels are available.
- Wider channels can provide higher potential speeds but reduce channel reuse opportunities.
- Dense installations may benefit from narrower channels.
- Channel availability depends on regulatory requirements and equipment capabilities.
However, we’re certainly not suggesting that 6 GHz completely eliminates interference problems.
Excessive Coverage Overlap
When planning and installing a wireless network for business, some overlap between Access Points is essential.
Businesses need continuous coverage as employees move between offices, meeting rooms and communal areas.
However, excessive overlap can create problems.
The key points to consider with coverage overlap when installing AP’s in a business network are:
- Multiple Access Points may provide strong signals in the same location.
- Clients might detect many suitable APs simultaneously.
- Poorly configured transmit power can make AP selection and roaming less predictable.
- Excessive overlap can contribute to co-channel contention when the same channels are reused.
- AP placement should balance coverage, capacity and roaming requirements.
Coverage overlap alone doesn’t automatically cause interference. The impact depends on channel assignments, signal levels, client behaviour and traffic.
A successful Wi-Fi design doesn’t aim to eliminate overlapping coverage. It aims to provide sufficient overlap for reliable connectivity while minimising unnecessary contention.
Five Signs Your Office Might Have Too Many Wi-Fi Access Points
Do you recognise any of these potential problems within your own workplace?
Whilst these issues could indicate a problem with too many Access Points, it’s important to remember that these symptoms aren’t definitive proof of excessive Access Points in your business network. There could also be other network issues at play.
If you’re not sure of the cause of your network problems, then it’s always advisable to seek the help of a Wi-Fi professional.
Sign 1: Your Wi-Fi Signal Is Excellent, but Performance Is Poor
Strong Wi-Fi signal strength doesn’t necessarily mean fast Wi-Fi.
A device might display full Wi-Fi signal bars while experiencing:
- Slow downloads.
- Delayed video calls.
- Poor application responsiveness.
- High latency.
- Inconsistent throughput.
This can happen when the wireless channel is heavily utilised or affected by interference.
Signal strength measures only part of the wireless experience.
Sign 2: Wi-Fi Becomes Slower When the Office Gets Busy
Wireless airtime is shared.
When more employees arrive and begin using their devices, competition for airtime increases.
Think about your office environment – Your employees or colleagues likely use:
- Laptops.
- Smartphones.
- Wireless headsets and collaboration devices.
- Video conferencing systems.
- Guest devices.
If numerous Access Points are competing for the same channels, the network may struggle during periods of high activity.
However, remember that increased demand can also indicate insufficient capacity rather than too many APs.
The solution depends on identifying the actual bottleneck. Don’t be afraid to seek the help of a professional Wi-Fi engineer to diagnose the problem.
Sign 3: Devices Don’t Always Connect to the Best Access Point
Wireless clients generally make their own decisions about which Access Point to connect to.
An employee might walk from one side of an office to another while their laptop remains connected to an AP farther away.
This is sometimes described as a sticky client.
Clients don’t always select the physically nearest Access Point. This can be due to excessive transmit power where clients remain connected to distant APs.
Roaming behaviour varies between devices. Proper AP positioning and power configuration can improve the roaming conditions in your office.
Features such as 802.11k, 802.11v and 802.11r may help where supported and appropriately configured.
Adding Access Points doesn’t automatically cause roaming failures, but can be a contributing factor when placement and power aren’t considered or managed appropriately.
Sign 4: Wi-Fi Performance Varies Between Rooms
Unfortunately, users can experience different performance even when signal strength appears similar.
Possible causes include:
- Different levels of channel utilisation.
- Interference from neighbouring Access Points.
- Building materials.
- Poor AP positioning.
- Client distribution.
- Channel width and power configuration.
One example of this could be the use of meeting rooms.
A meeting room containing ten people on video calls may need considerably more capacity than a similarly sized storage room.
The number of APs required depends on usage, not just floor area.
Sign 5: You’ve Installed More Access Points, but Nothing Has Improved
This one is probably the strongest commercial indicator of too many AP’s causing problems for your business Wi-Fi network.
Just adding equipment without investigating the problem can lead to unnecessary expenditure.
The original issue might be:
- Poor channel planning.
- Inappropriate AP placement.
- Excessive channel utilisation.
- Incorrect transmit power.
- Insufficient capacity in specific areas.
- A wired network or internet connection bottleneck.
Before purchasing another Access Point, businesses should understand what’s actually causing their wireless performance problems. If you’re not confident on how to do that, then invest in a Wi-Fi Survey from a wireless network professional.
Spending money on a Wi-Fi Survey could end up saving you money on unnecessary hardware and more network problems down the line.
Is It Better to Have Fewer, More Powerful Wi-Fi Access Points?
Another common misconception when it comes to business Wi-Fi networks is the assumption that fewer APs operating at maximum transmit power will deliver better results.
This isn’t necessarily true.
Wi-Fi Communication Works in Both Directions
An Access Point needs to communicate with the client, but the client also needs to communicate back.
An AP might transmit at a relatively high power level, while a smartphone or laptop has a lower transmission capability.
This can create an imbalance.
The client may detect a strong signal from the AP but struggle to communicate reliably in the opposite direction.
Increasing AP transmit power doesn’t automatically improve the quality of a wireless connection.
Why Lower Transmit Power Can Sometimes Help
Reducing transmit power can sometimes:
- Reduce unnecessary coverage overlap.
- Improve channel reuse.
- Encourage clients to associate with more appropriate APs.
- Reduce contention between distant cells using the same channel.
However, transmit power shouldn’t simply be reduced everywhere.
Excessive reductions can create coverage gaps or unreliable connections.
Why Fewer APs Aren’t Always Better
High-density environments may genuinely require more Access Points.
Examples of situations where more AP’s may be helpful in a business Wi-Fi network include:
- Conference facilities.
- Busy meeting rooms.
- Training centres.
- Large open-plan offices.
- Warehouses using wireless handheld devices.
The correct approach is to design around coverage, capacity and application requirements.
The objective isn’t to install the fewest possible Access Points. It’s to install the appropriate number and configure them correctly.
How Do Wi-Fi Professionals Determine the Right Number of Access Points?
Professional Wi-Fi design involves more than counting rooms or calculating floor area.
There are three important elements when designing and deploying a business Wi-Fi network.
Predictive Wi-Fi Design
Here at Geekabit, our Wi-Fi engineers use specialist software to model wireless coverage before equipment is even installed.
Geekabit uses professional Wi-Fi planning tools, including Hamina, to help design wireless networks.
What’s the process of predictive Wi-Fi design? A predictive design may consider:
- Building floor plans.
- Wall locations and construction materials.
- Ceiling heights.
- Expected numbers of users.
- Wireless applications.
- Available frequency bands.
- Access point models and antenna characteristics.
- Proposed AP positions and transmit power.
The software can generate predictive coverage maps showing how signals are expected to propagate throughout your office building. This means that we can see how repositioning an AP could change the predicted coverage without necessarily increasing the number of APs.
Whilst specialist predictive software are brilliant tools in the world of Wi-Fi, remember that predictive designs are models.
Their accuracy depends on the quality of the information provided and the assumptions used.
Where appropriate, onsite validation is needed to confirm actual performance.
Imagery: Hamina predictive coverage heatmap.
Professional Wi-Fi Site Surveys
Wi-Fi Site Surveys allow wireless engineers to assess real-world conditions.
Depending on the project, this might involve:
- Passive surveys
Measuring the wireless environment, including signal strength, channel usage and surrounding networks.
- Active surveys
Connecting to the network to assess aspects of client connectivity and performance.
- Spectrum analysis
Investigating radio-frequency activity, including sources that might not be standard Wi-Fi transmissions.
A site survey can help identify:
- Coverage gaps.
- Excessive channel contention.
- Poor AP positioning.
- Interference.
- Inappropriate channel configurations.
- Areas with insufficient capacity.
Not every project requires every survey method.
The appropriate assessment depends on the environment and the problems being investigated.
Capacity Planning
Do you understand the difference between coverage and capacity?
Coverage concerns whether devices can establish reliable wireless connections in the required locations.
Capacity concerns whether the network can support the expected number of devices and their applications at acceptable performance levels.
Here’s a real world example: Consider two rooms of identical size.
Room A is a storage area, occasionally accessed by one employee.
Room B is a meeting room, regularly occupied by 20 people using laptops and video conferencing.
Although both rooms occupy the same floor area, their wireless requirements are very different.
Professional Wi-Fi design considers expected usage rather than simply providing a strong signal everywhere.
The correct number of Access Points should be determined through appropriate design and assessment, not guesswork.
Should You Remove Wi-Fi Access Points to Improve Performance?
Yes, removing an unnecessary Access Point can sometimes improve Wi-Fi performance, but only when measurements demonstrate that doing so won’t create other problems.
An additional AP might contribute to unnecessary contention or provide little useful coverage or capacity.
However, switching it off could also create a coverage gap or overload neighbouring Access Points.
So how would you investigate this in your office or business?
A professional Wireless Engineer would approach this by:
- Reviewing existing AP locations and configurations.
- Measuring coverage and channel utilisation.
- Examining how clients are distributed between APs.
- Identifying potential interference or contention.
- Evaluating changes to channel assignments or transmit power.
- Testing whether repositioning, disabling or removing an AP improves performance.
- Validating coverage and performance after changes.
As a business, you shouldn’t randomly disable Access Points or reduce transmit power without understanding the consequences.
In some environments, better channel planning or AP repositioning may resolve the issue without removing any hardware.
How Geekabit Helps Businesses Improve Wi-Fi Performance
Here at Geekabit, we specialise in professional Wi-Fi Design, Site Surveys and Wireless Network Troubleshooting for UK businesses.
At Geekabit, the role of our expert Wi-Fi Engineers is to identify the underlying causes of wireless problems and recommend appropriate solutions.
Our professional Wi-Fi recommendations
Following an assessment, Geekabit might recommend:
- Repositioning existing Access Points.
- Optimising channel assignments.
- Adjusting transmit power.
- Changing channel widths.
- Removing unnecessary Access Points.
- Installing additional APs where coverage or capacity requires them.
- Redesigning the wireless network.
The objective is always reliable wireless performance, not simply selling additional hardware.
Not Sure Whether Your Office Has Too Many Wi-Fi Access Points?
Adding more Access Points isn’t always the answer to poor Wi-Fi.
Geekabit provides professional Wi-Fi Site Surveys and Wireless Network Assessments to help your business understand what’s affecting your connectivity.
Whether your network needs additional coverage, better channel planning or a complete redesign, our specialists can help identify the right solution.
Contact Geekabit today to discuss your business Wi-Fi requirements.
Frequently Asked Questions
Can too many Wi-Fi access points cause interference?
Yes. Installing too many Wi-Fi access points without appropriate channel planning can increase interference and contention. When nearby access points operate on the same channel, they may need to share the available wireless airtime. Overlapping channels can introduce additional interference. Professional Wi-Fi design helps manage these issues through appropriate access point placement, channel allocation and transmit power settings.
Can adding more access points make Wi-Fi slower?
Yes. Additional access points can make Wi-Fi slower if they increase channel contention or interference without providing useful additional capacity. However, adding access points can also improve performance when a network genuinely requires better coverage or greater capacity. The outcome depends on how the wireless network is designed and configured.
How close is too close for Wi-Fi access points?
There is no universal minimum distance between Wi-Fi access points. Appropriate spacing depends on factors including building materials, frequency bands, transmit power, antenna characteristics and expected client density.
