AV coordination often starts after construction documents are issued. At that point, a shallow ceiling plenum, a missing conduit path, or a reflective glass conference room becomes a drawing revision instead of a design input.
None of this is the architect's fault. AV is a specialty discipline that gets limited coverage in architecture school. Conference rooms are networked technology environments with infrastructure requirements that affect structural, electrical, and acoustic decisions from day one.
Use this guide during schematic design for meeting spaces, collaboration areas, and public-facing AV systems.
Why AV matters earlier than you think
The most expensive AV problems are architectural problems. A display needs a structural wall that was not reinforced. A ceiling speaker conflicts with an HVAC diffuser. A control room is missing from the space plan. These are coordination failures that become harder to resolve after the design is fixed.
During schematic design, AV requirements can shape drawings that are already in progress. During construction administration, the same requirement can trigger drawing revisions, change orders, or rework.
If a building includes integrated meeting rooms, bring AV into schematic design. The goal at that stage is to flag architectural decisions that will constrain AV performance later.
The architectural decisions that AV depends on
Most architects are surprised by how many of their early design decisions directly affect AV outcomes. Here are the big ones:
Ceiling height and plenum depth. In-ceiling speakers, microphone arrays, and projectors all require plenum space. A Shure MXA920 ceiling microphone array, for example, needs a minimum of 2 inches above the ceiling tile for the device body, plus clearance for cabling and mounting hardware. Ceiling speakers from QSC or Biamp typically need 6-10 inches of plenum depth depending on the model. If the architect specifies a 9-foot finished ceiling with 12 inches of plenum in a space with significant HVAC ductwork, there may not be room for AV devices after mechanical, electrical, and fire protection systems claim their space.
Coordinate plenum allocation during schematic design. Reserve usable space for ceiling-mounted AV equipment and flag rooms where structure, ducts, or other trades reduce the available depth.
Wall construction and backing. Large displays are heavy. A 98-inch commercial display weighs 150-200 pounds and needs structural backing, typically 3/4-inch plywood behind the drywall secured to studs or steel framing. If the architect specifies a display wall without backing, the integrator discovers this during installation and the options are all bad: open the wall and add backing (expensive and messy), use a floor stand (ugly and space-consuming), or mount to a different wall that may not work for sight lines.
Similarly, interactive displays and video bars often require recessed conduit and junction boxes behind the mounting location. These need to be coordinated during the electrical rough-in, not after the walls are finished and painted.
Conduit pathways. AV systems need cable pathways between equipment locations. These include the display wall to the room system, the ceiling microphone to the network switch, and the conference table floor box to the wall plates. In commercial construction, these pathways are typically conduit or cable tray, and they need to be specified on the electrical drawings.
A common miss is no conduit between the conference table and the technology closet or credenza. Modern conference rooms need connectivity at the table for touch panels, table microphones, or cable cubby connections. Without a floor box and conduit path, the remaining choices are surface-mounted raceways or cables under carpet tiles. Neither is acceptable in a finished space.
Room geometry and sight lines. Display placement is driven by sight lines, which are driven by room geometry. The standard guidance for a flat-panel display: the bottom of the screen should be 36-48 inches above the finished floor, and the display size should ensure that the farthest viewer is no more than 8x the screen height away. For a 75-inch display (approximately 37-inch screen height), that means the farthest seat should be within about 25 feet.
In practice, this means the architect needs to think about display placement while laying out the furniture plan, not after. A room can otherwise leave the only viable display wall behind the presenter, place a column in the sight line, or lack space for a second display when one is not adequate.
Window placement and lighting. Windows are the enemy of display visibility. A conference room with floor-to-ceiling glass behind the display location will wash out the screen for most of the day. Automated shading helps but adds cost and complexity. The better solution is to position displays on interior walls and keep glazing on the sides or behind the viewers.
Lighting design matters too. Camera performance depends on even, front-facing illumination of the participants. Recessed downlights directly above the conference table create harsh shadows under people's eyes and brows. Those shadows also cause problems for camera-based speaker tracking. Indirect or edge-lit lighting gives cameras a more even image.
Acoustic considerations architects can't ignore
Acoustics connects architectural design directly to AV performance.
The fundamental metric is reverberation time (RT60), which measures how long sound takes to decay by 60 dB after the source stops. For a conference room used for video calls, the target is 0.4-0.6 seconds. For a training room or boardroom, 0.5-0.7 seconds. For a large multipurpose room or auditorium, it depends on the use case, but generally 0.8-1.2 seconds.
Here's what drives reverberation in architectural terms:
The practical implication for architects is to specify acoustic treatment in the finish schedule for every room that will have AV systems. Work with the AV consultant or an acoustician to identify where absorption is needed and incorporate it into the design. Acoustic ceiling tiles, wall panels, and upholstered furniture all contribute.
Polished concrete floors, glass walls, and exposed ceilings can produce enough reflected sound to undermine microphone coverage. Model the room before finishes are locked, then include the required absorption in the finish schedule.
What to expect from AV consultants at each design phase
Knowing when to involve AV and what deliverables to expect keeps the coordination productive:
Schematic Design. The AV consultant reviews floor plans and provides input on room layouts, display wall locations, conduit pathway concepts, and ceiling plenum requirements. The deliverable is a brief narrative describing AV intent for each room type, with notes on architectural constraints to watch.
Design Development. The AV consultant produces preliminary AV drawings showing equipment locations, cable pathway routing, power and data requirements, and coordination notes for other trades. This is when the AV design gets overlaid on the architectural and MEP drawings to identify conflicts. Deliverable: floor plans with AV equipment locations, reflected ceiling plans showing speaker and microphone placement, and a preliminary equipment schedule.
Construction Documents. The AV consultant issues construction-level drawings and specifications. These include detailed wiring diagrams, rack elevations, control system programming narratives, and coordination details with electrical, mechanical, and low-voltage contractors. Deliverable: a full AV drawing set suitable for bidding and construction.
Construction Administration. The AV consultant reviews submittals, answers RFIs, conducts site visits to verify rough-in and installation quality, and performs final commissioning. They can verify that the installation matches the design and catch deviations before spaces are finished.
Common mistakes architects make
These mistakes usually begin when AV enters the project after architectural decisions are fixed.
Assuming flat-panel displays don't need infrastructure. "It's just a TV. Hang it on the wall." A commercial display needs a dedicated 20-amp circuit, a network drop, an HDMI or HDBaseT connection back to the room system, structural wall backing, and often a recessed junction box. None of this is visible in the finished room, but all of it needs to be planned during construction.
Designing rooms around the table instead of the technology. The table is furniture. The camera, microphone, display, and network connectivity are infrastructure. When room layout starts with the table and treats technology as an accessory, the result is often a room where the camera can't see everyone, the microphone can't hear the far end, or the display is mounted so high that everyone stares at their laptops instead.
Specifying acoustically hostile finishes without compensation. Glass, concrete, and other hard surfaces require acoustic treatment elsewhere in the room. Include that treatment in the design instead of leaving it for post-occupancy remediation.
Undersizing technology closets. AV systems need rack space, typically 6-12 rack units per room for video processing, audio DSP, control systems, and network switches. A Crestron or Biamp DSP alone occupies 1-2 rack units and generates heat that needs ventilation. A 3x3 closet with no cooling and one duplex outlet will not support the AV systems the building needs.
Forgetting about the back of house. Large meeting spaces, boardrooms, and auditoriums often need a dedicated equipment room or closet adjacent to the room. This space houses amplifiers, signal processors, recording equipment, and control system processors. It needs adequate power (often a dedicated 20-amp circuit per rack), cooling (AV equipment generates significant heat), and physical access for maintenance. Planning this space into the architecture from the beginning is straightforward. Retrofitting it after the fact ranges from difficult to impossible.
Power and data: the unsexy essentials
Every AV device needs power and most need network connectivity. The details matter:
The electrical engineer needs this information during design development. The AV consultant should provide a power and data schedule that maps every device to a circuit and network drop, coordinated with the electrical drawings.
Why early AV planning costs less
Compare each requirement with the project phase in which it appears:
Early coordination does not eliminate every change order. It does keep predictable AV requirements out of the construction issue queue.
Beyond the immediate project economics, buildings designed with proper AV infrastructure are more adaptable over their lifecycle. When the collaboration platform, display technology, or room configuration changes, the conduit, backing, power, and acoustic treatment are already in place. The technology refresh becomes an equipment swap instead of a renovation project.
AV equipment will change over a building's life. The pathways, power, and acoustic environment need to be right from the beginning because they are difficult to change later.