If you’re a building owner or facilities manager, you’ve probably heard of Emergency Responder Communication Enhancement Systems (ERCES) or Bi-Directional Amplifiers (BDAs). These systems ensure that firefighters, police officers, and EMS personnel can maintain reliable radio communications inside your building during an emergency.
Unfortunately, misconceptions abound. Some property owners confuse BDAs with consumer cell boosters, while others assume every building must install one, or that once installed, they never need attention again. Misunderstanding the facts can lead to code violations, unnecessary expenses, or even unsafe conditions during an emergency.
In this post, we’ll clear up the five most common misconceptions about ERCES/BDA systems—so you can make smarter, compliance-ready decisions for your facility.
Misconception #1: “BDAs are the same as cell phone boosters.”
At first glance, BDAs look similar to cellular signal boosters. Both use antennas and amplifiers to extend signal coverage. But that’s where the similarities end.
- Cell boosters improve coverage for commercial cellular networks (like Verizon or AT&T) to help tenants and employees get better reception.
- ERCES/BDA systems specifically amplify public safety radio frequencies used by fire, police, and EMS.
Using the wrong equipment is more than ineffective—it can actually interfere with public safety networks. That’s why ERCES/BDA systems must be designed, installed, and tested by certified professionals who understand the NFPA and IFC codes and coordinate with the local Authority Having Jurisdiction (AHJ).
Bottom line: Cell boosters help your staff make calls, but BDAs help first responders save lives.
Misconception #2: “All buildings are required to have an ERCES/BDA.”
Not every building needs an ERCES/BDA. The requirement depends on the results of an RF (radio frequency) survey performed during construction or major renovation.
Codes like NFPA 1225 and IFC Section 510 don’t automatically mandate systems in every facility. Instead, they set coverage thresholds:
- 95% coverage in critical areas (like stairwells, elevators, fire pump rooms)
- 90% coverage in general areas
If your building already meets these standards, you may not need an ERCES/BDA system. However, most large facilities—such as hospitals, high-rises, warehouses, and schools—often fail the RF survey because of structural materials that block radio waves.
Bottom line: Testing comes first. Systems are only required if your building cannot meet coverage thresholds.
Misconception #3: “Once a BDA is installed, you never have to test it again.”
This is one of the most dangerous myths. ERCES/BDA systems are not “set it and forget it” solutions. Over time, changes in building layout, renovations, or even updates to public safety radio networks can affect performance.
That’s why codes require:
- Acceptance testing after installation (with AHJ oversight).
- Annual testing and recertification to confirm ongoing coverage.
- Battery and backup system testing to ensure the system works during a power outage.
Skipping testing not only risks non-compliance—it could mean the system fails during a real emergency, leaving responders without communication inside your building.
Bottom line: Think of ERCES/BDA like your fire alarm system. It requires regular testing and maintenance to stay reliable.
Misconception #4: “All BDAs are basically the same.”
It’s easy to assume that one BDA system is like another. In reality, BDAs must be carefully engineered for each specific building.
Key factors that vary from project to project include:
- Building size and layout – A 50,000 sq. ft. warehouse needs a very different design than a 20-story office tower.
- Construction materials – Concrete, metal, and glass can block signals in unique ways.
- Local radio frequencies – Each jurisdiction uses different public safety bands, which the system must be tuned to amplify.
- AHJ requirements – Fire marshals may have specific local standards beyond NFPA and IFC codes.
Using a “one-size-fits-all” approach can result in coverage gaps—or worse, interference with the very networks the system is meant to support.
Bottom line: Every BDA system must be custom-engineered, installed, and tested for your facility and jurisdiction.
Misconception #5: “ERCES/BDA systems are just another code requirement with no real benefit.”
Some building owners see BDA systems as nothing more than a box to check for occupancy permits. But the real purpose is far more important.
During emergencies, reliable radio coverage allows responders to:
- Coordinate search and rescue operations.
- Call for backup or medical support.
- Report hazardous conditions.
- Protect both occupants and themselves.
Without clear communication, responders may waste precious minutes navigating blind spots—or worse, be left unable to call for help. In life-or-death situations, those minutes matter.
Bottom line: ERCES/BDA systems are not just about compliance—they’re about saving lives and protecting property.
Final Thoughts
Misunderstandings about ERCES and BDA systems are common, but they don’t have to derail your project or put your building at risk. The key is to separate myth from fact:
- They’re not cell boosters.
- Not every building needs one—but most large or complex structures do.
- They require ongoing testing and maintenance.
- Each system is custom-designed to meet local codes and building needs.
- Above all, they’re about responder safety—not just red tape.
At Koorsen Fire & Security, we specialize in guiding building owners through the entire ERCES/BDA process: from RF surveys and system design to installation, annual testing, and AHJ coordination. With decades of experience and a reputation for compliance excellence, call Koorsen Fire & Security today to help ensure your system is both code-compliant and life-saving.
