We occasionally have temperatures below freezing, and many of our AHUs are equipped with a hot water preheat coil located after the mixed air plenum
and in front of the cooling coil (see Figure 1).
The rest of the data center then becomes a large hot air plenum
existing ceiling configuration provides air return thru the existing lighting fixtures, into an open air plenum
above the dropped ceiling.
The RLD is decoupled from the interlinked OAD and RCD to form a new control input, while the relief air plenum
static pressure forms a new controlled variable.
The mixed air plenum
of an air handler or rooftop unit may be a dark and windy place, but it's important to regularly test the operation of air-side economizers to ensure their long-term performance.
The existing ventilation openings to the tunnel roadway were retained and enlarged, and the existing fan room was converted into an air plenum
which connected the roadway openings to the new fan room.
Additional trenchless technology services include: large sewer, storm drain and non-circular pipeline renovation; manhole and tunnel repair; CIPP; pressure, gas, force main repair; pipeline cleaning and CCTV inspection; air plenum
ventilation duct renovation; and NSF 61 water main rehabilitation.
The air plenum
includes an abrasion-resistant baffle plate exclusive to the M-Series.
That's because they won't line up with the original compression points on the air plenum
box seal, which will cause gaps in the seal.
Where maintaining the integrity and effectiveness of an under floor air plenum
delivery system is essential to a mission critical facilities energy efficiency, the new Air-Guard 5” Round cable seal incorporates a two-stage sealing system that integrates an (EPDM) “rubber” gasket combined with overlapping brush technology to deliver an airtight seal around cables, helping to eliminate air leakage and control airflow bypass in under-floor cable installations.
The coating module uses the same principle as big production systems and has a fully perforated drum with a high amount of perforated surface, a guided air stream going straight through the tablet bed, as well as a special exhaust air plenum
The dampers are connected to a common air plenum
in the machine base, which is in turn connected to a single exhaust fan, either connected to the base or mounted remotely.