How many Wi-Fi access points a shop, office or warehouse needs

Coverage and capacity are different problems.

Coverage means a usable signal reaches every place people work. Capacity means the network can serve every device that's active at the same moment. A warehouse with a handful of scanners spread across a large floor is mostly a coverage problem. An office where everyone is on video calls is mostly a capacity problem.

Every access point shares its airtime among the devices connected to it. Add devices and each one gets less, even with full bars. The client limit on a spec sheet is how many devices can connect, not how many can work well at once.

Count devices, not people. Most staff carry a phone and use a laptop. Add tablets, printers, card readers, scanners, TVs and anything else that joins the Wi-Fi.

Start with a rule of thumb, then check it.

Installers often start a walled office at one ceiling access point per 1,500 to 2,500 square feet. Brick, concrete and dense walls push that toward the low end. An open floor with few walls stretches it. For capacity, plan on a few dozen active devices per access point. A conference room, training room or break room that fills up at once should get its own.

That gives you a starting count for a budget. It isn't a design. A predictive design from a floor plan, or a survey on site, is worth paying for in warehouses with tall racking, on sites with several buildings, and anywhere phones or scanners have to move between access points without dropping.

More access points aren't always better. Nearby access points on the same channel take turns. Several of them at full power in one open room can perform worse than fewer placed well at lower power. Business access points let you set channels and power, and most management consoles adjust them for you.

Ceiling height and racking change the plan.

Most ceiling access points are built to hang at office ceiling height and spread signal down and out. Hung near the roof deck of a high-bay warehouse, much of that signal never reaches the floor, and a scanner at waist height has a hard time talking back.

In tall spaces, bring access points down on drop rods, or mount them on columns or walls. For long aisles, models with directional antennas can aim the signal down each aisle. Plan aisle by aisle, because full racks block signal between aisles. What's on the shelves matters too. Liquids absorb Wi-Fi and metal reflects it, so the same building can test differently when it's full.

A shop with service bays has the same problem on a smaller scale. Vehicles, lifts and tool chests are all metal. The signal that's fine in the front office can be weak at the last bay, where the scan tools and tablets are. Give the bays their own access point.

Metal buildings and outbuildings need their own access points.

Steel walls and roofs block most Wi-Fi. A pole barn, a metal shop or a detached garage usually needs an access point inside it, fed by a cable from the main network. A stronger router in the main building rarely reaches it.

Between buildings, run fiber in conduit or set up a pair of point-to-point wireless bridges with a clear line of sight. Fiber is the safer choice for a run between buildings because it doesn't conduct electricity. Yards, lots and loading docks need access points rated for outdoor use.

Give every access point a cable.

Mesh access points relay traffic over the air, and every relay uses airtime your devices need. In a business, each access point should have its own Ethernet cable back to a switch. Keep mesh for the one spot a cable can't reach.

An Ethernet run is good for 100 meters (328 feet) from the switch to the device. Past that, use fiber or put a switch closer to the access points. Cat6 is the usual choice for new runs.

The same cable powers the access point through Power over Ethernet (PoE). Check the PoE standard each model needs. Many Wi-Fi 6 access points run on PoE+ (802.3at). Some Wi-Fi 7 models need 802.3bt for every feature and run with limits on PoE+. The PoE switch guide at /guides/poe-switch-power-budget-and-ups-sizing covers adding up the watts.

Choose the Wi-Fi generation by your devices.

Wi-Fi 6 handles many devices at once better than Wi-Fi 5. It's a sound baseline for a business buying today.

Wi-Fi 6E adds the 6 GHz band. It's less crowded and has room for wider channels, but it doesn't travel as far through walls as 5 GHz, and only devices with a 6 GHz radio can use it.

Wi-Fi 7 adds wider channels in 6 GHz and multi-link operation, which lets a device use more than one band at once. It pays off when your laptops and phones support it and the access point's multi-gig port connects to a multi-gig switch port. Handheld scanners, card readers, printers and cameras usually stay on 2.4 or 5 GHz, so a newer access point doesn't speed them up.

Buying Wi-Fi 7 for a network you plan to keep five years or more is reasonable. Buying it to fix a dead spot isn't. A dead spot is fixed by where the access points go, not by which generation they are.

What to have ready.

Ceiling and wall access points are at /shop/wifi-networking. PoE switches are at /shop/switches, and gateways are at /shop/routers-gateways. For a layout and a quote, send the details below through /rfq?department=network-hardware.

• Square footage for each area, and a floor plan if you have one
• Ceiling height and type: drop tile, open deck or beams
• Wall materials, and which buildings are metal
• Devices per area, and which ones move around while in use
• Where the network closet is, and the distance to the far corners
• The switch and gateway models you're keeping, if any