VADDIO Extreme TX Specifications download pdf (Page 484)

Integrator’s Reference Manual for Polycom HDX Systems

A–4 Polycom, Inc.

Ceiling Tiles

These should be high-quality acoustic tiles, ideally 1”- thick compressed

densecore fiberglass. An added benefit of this kind of ceiling tile is that it

works well with the indirect lighting as specified elsewhere in this section. To

reduce any extraneous noise from leaving or entering the room via the ceiling

space, the ceiling tiles can be blanketed completely from the plenum side, with

a minimum of 6”- thick unfaced dense fiberglass batting or mineral rock wool,

(the equivalent of R-15 to R-19). Here again, a barrier layer will improve the

performance, but all local building codes must be followed for allowable

materials in the various aspects of room acoustic modifications. To make entry

and exit from the ceiling space easier, the blanket and barrier do not need to

rest on the ceiling tiles, but may be suspended above it.

Air Conditioning

It is critical that all air-handling equipment (blowers, heat exchangers,

solenoid valves, etc.) be located outside the physical meeting room space. This

will prevent the noise burden associated with such equipment from affecting

the participants of any meetings held in the room. Location of air-handling

equipment within the ceiling space of a conference room often renders that

room unusable for video or audio-only conferencing.

The air vents should be of open construction to eliminate “wind noise” while

the system is running. These vents normally are specified as “low-velocity”

diffusers. The number of air vents within the room should be sufficient to

maintain a consistent temperature throughout the space. All HVAC ducts and

diffusers should be oversized for the general application in the space, with

minimum 2’ diameter insulated flexible ducts and matching 2’ noise

dampening diffusers generally best. All ducts should be installed with gradual

bends and curves rather than rigid 90-degree corners. This will minimize

“thunder” sounds as the initial air pushes through the ductwork and into the

room.

There should be a thermostat to control this specific room system

independently of the rest of the building, and that control should be located

within the room.

Important: Allow an additional 5,000 BTU of cooling capacity for a standard

“roll-about” singlemonitor VC system with extended in-room peripherals

(PC, document camera, scan converter, etc.) and a minimum of 10,000 BTU for

a dual display multimedia presentation system with large screen displays. For

the comfort of the participants, the room must accommodate these heat loads,

plus the heat load of a room full of people, with minimal temperature rise.

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VADDIO Extreme TX Specifications Page 484