Wi-Fi 7: when it's worth the money and when it isn't

We get asked about Wi-Fi 7 on nearly every quote now, usually phrased as "should we just future-proof it?"

The honest answer is that Wi-Fi 7 is a genuine improvement and also completely wasted in a lot of the buildings we survey. Both of those are true at the same time, and which one applies to you comes down to three questions.

What it actually changes

Three things matter.

320 MHz channels. Twice the width of the widest Wi-Fi 6E channel, and where the headline throughput numbers come from. These only exist in the 6 GHz band. There isn't enough contiguous spectrum in 2.4 or 5 GHz to fit them.

Multi-Link Operation. A client can use two bands at once, say 5 GHz and 6 GHz, as a single logical link instead of picking one and committing. This is the genuinely clever part, and it does more for latency and reliability than it does for raw speed. It's also the feature most likely to be noticeable day to day.

4K-QAM. A denser modulation scheme, roughly 20% more bits per symbol than Wi-Fi 6's 1024-QAM. It only engages at very high signal-to-noise ratios, which in practice means close to the access point with little interference.

Question one: do your clients support it?

This settles most arguments. An access point can't deliver Wi-Fi 7 to a Wi-Fi 6 laptop. If your fleet is three-year-old ThinkPads and a pile of iPads, a Wi-Fi 7 access point serves them at Wi-Fi 6 speeds and you've paid a premium for nothing.

Where that flips: if you refresh laptops and phones on a rolling cycle, the fleet will be substantially Wi-Fi 7 within a couple of years, and access points usually outlive laptops. That's a legitimate argument for buying ahead. "We might upgrade someday" isn't.

Question two: can you actually use 6 GHz?

Every real Wi-Fi 7 benefit routes through the 6 GHz band, and 6 GHz has a property people underestimate: it doesn't go through walls well. Higher frequency, shorter range, worse penetration.

In an open-plan office with access points every forty feet, that's fine. In a 1920s building with lath-and-plaster walls, or a warehouse full of steel racking, your 6 GHz coverage will be a series of disconnected bubbles. Clients fall back to 5 GHz, where Wi-Fi 7 buys you very little.

More access points fixes this. More access points also costs more than the upgrade did.

Question three: is wireless even the bottleneck?

The most common cause of "the Wi-Fi is slow" isn't the Wi-Fi. In rough order of how often we find it:

1. The internet circuit is saturated.
2. The access point is uplinked at a gigabit and that's the choke point.
3. Two access points are on overlapping channels and fighting each other.
4. The access point is in a hallway ceiling sixty feet from where people sit.
5. Wi-Fi generation.

We've fixed far more slow-Wi-Fi complaints by moving an access point fifteen feet or redoing a channel plan than by upgrading hardware.

The uplink trap

This deserves its own section, because it's the most common way a Wi-Fi 7 deployment disappoints.

A Wi-Fi 7 access point can plausibly move more than a gigabit of aggregate wireless traffic. Plug it into a gigabit switch port and that gigabit is your ceiling. You've bought a sports car and left it in second.

Getting the benefit means a 2.5 GbE or faster switch port, which often means a new switch, which sometimes means new cable if the runs are old Cat5e.

Cat5e will usually carry 2.5GBASE-T at in-building distances, so you may get away with it. Cat6 is comfortable there and handles 10GBASE-T to about 55 metres. Cat6A does 10 Gig to the full 100. If you're pulling new cable anyway, pull Cat6A. The cable is the part you don't want to touch twice.

So the real cost of "just go Wi-Fi 7" is frequently access points plus a multi-gig switch plus possibly a cabling refresh. Budget the project rather than the access point.

Where we do recommend it

• Dense environments. Conference spaces, classrooms, anywhere with a lot of clients per access point. MLO and wider channels genuinely help.
• New construction and gut renovations, where you're pulling cable anyway and the install labour is already in the budget.
• Latency-sensitive work. Live production, large file transfers, anything where people sit waiting on the network.
• Fleets that already landed on Wi-Fi 7 clients.

Where we don't

• Small offices under twenty-five people with a gigabit circuit and decent existing 5 GHz coverage.
• Any building where the real fix is more access points, or better-placed ones.
• Sites still running Cat5e throughout with no appetite for a cabling project. The money is better spent on cable.

Wi-Fi 7 isn't hype and it isn't a scam. It's a real improvement that needs 6 GHz coverage, capable clients, and a fast uplink before it shows up at all. Get those three right and it's excellent. Miss one and you've bought a line on a datasheet.

If you're not sure which camp your building is in, we'll come survey it and tell you plainly.

• Wi-Fi 7
• Wireless
• Design