The coil bypass air-handling unit
is commonplace for underfloor air (2) distribution and displacement ventilation systems and is sometimes used in small cleanrooms.
Carrier, a high-technology heating, ventilating, air conditioning and refrigeration (HVACR) solutions company, introduced to Saudi Arabia its AquaForce 30XV air-cooled screw chiller, along with the XPower variable refrigerant flow system (VRF) and the Airovision 39HQM air-handling unit
at events in Jeddah and Riyadh recently.
Radiant floor heating and an air-handling unit
provide dry air throughout the year.
Quark Communications installed several Echelon LonPoint[R] modules to monitor some of the points on an older air-handling unit
. They also fitted new Trane air-handling units
and VAV boxes in the new addition with Echelon's FTT-10A free topology interface.
The system is comprised of a dedicated fresh air-handling unit
and another recirculating air-handling unit
Alternately, the system could consist of a separate cooling air-handling unit
, a heating air-handling unit
and a heat recovery minimum outside ventilation air package.
For example, the main air-handling unit
has 50,000 cfm capacity, which can supply 100% outside air to support a building ratio of 20% laboratory and 80% office space.
If an air-handling unit
is located in a room adjacent to the corridor, for example, it is unacceptable to place a return grille serving that air-handling unit
directly into the corridor wall, and use transfer openings from each office into the corridor proper.
Peterson, P.E., has crafted an excellent article that essentially puts forth the notion that air-handling unit
selection should consider the coil face velocity (and the air-handling unit
dimensional characteristics that follow from that selection) as one measure of the lifecycle cost of an air-handling unit
Their real estate broker brought them a deal that included a reasonably low rent, a rent abatement of three months to offset the construction period, moving expenses paid directly by the landlord, a build-out allowance of $50 per rentable square foot, and a 20-ton air-handling unit
for central air distribution on the floor.
A ducted connection between the relief duct of the nonlab air-handling unit
and the intake of the laboratory air-handling unit
is shown in Figure 2.