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What Is a Wireless Site Survey and Heat Map?

Measuring real signal, interference and coverage so access points go where they are needed.

A wireless site survey measures how Wi-Fi actually behaves in your space, including signal strength, interference, coverage gaps and channel overlap, and a heat map displays the results as a floor plan colored by signal quality. It replaces guessing about access point placement with data.

What the survey includes

  • Walkthrough measurement. Signal strength and noise are recorded across the floor plan with survey equipment.
  • Interference analysis. Neighboring networks, microwaves, cordless phones, warehouse equipment and building materials that degrade signal.
  • Coverage and capacity review. Not just "is there signal" but "can 40 people in this conference room all join a video call."
  • Access point audit. Testing each existing AP, checking for overlap and dead zones, verifying spacing and channel plans.
  • Heat map. A visual of signal coverage, weak points and problem areas.
  • Recommendations. Where to add, move or remove access points, what channels and power settings to use, and what cabling is needed.

Predictive vs on-site

A predictive survey models coverage from a floor plan before a space is built or occupied, useful for new offices and moves. An on-site survey measures the real environment. The best results come from a predictive design validated by an on-site survey after installation.

When you need one

  • Moving into or building out a space. See planning IT for an office move.
  • Complaints about slow or dropping Wi-Fi that reboots do not fix.
  • Upgrading access points; see Wi-Fi 6 vs 6E vs 7.
  • Warehouses, clinics and large open offices where coverage and density are hard to eyeball. See how many access points do I need.
  • Adding VoIP, scanners, tablets or other devices that depend on reliable wireless.

Why it saves money

Access points cost money and cabling costs more. A survey prevents buying six where four placed correctly would do, and prevents installing four where the building needs eight.

Mentis Group performs wireless site surveys and heat mapping in Dallas-Fort Worth, and designs and supports business Wi-Fi, including wireless network support on platforms like Cisco Meraki. See what is Cisco Meraki.

Have a question about your own environment? Schedule a consultation with Mentis Group or call (866) 901-7808.