Building pressurization

Building pressurization

The air pressure within a building relative to the air pressure outside. Positive building pressurization is usually desirable to avoid infiltration of unconditioned and unfiltered air. Positive pressurization is maintained by providing adequate outdoor makeup air to the HVAC system to compensate for exhaust and leakage.
References in periodicals archive ?
LBFG discovered the causes to be an improperly designed air barrier system, improperly operating humidifiers set so high as to cause excess humidity, and exfiltration of humid interior air through HVAC-induced building pressurization.
The locations of the NPPs in the stairwells are shown in Figure 7 for various levels of building pressurization.
Short adds, however, that no matter how good the seals and R-factor on the docks, energy conservation efforts will fail without building pressurization.
For buildings with commercial HVAC systems, building pressurization is the third component of radon remediation.
As addressed earlier, building pressurization and dehumidification should be considered for both systems.
As such, design of a chilled beam system must include the ability of the operations staff to be informed, under all operating conditions, that building pressurization is maintained.
Some interviews with TAB contractors revealed that in some cases minimum OSA levels would be set to zero or some other arbitrary flow which could lead to building pressurization issues if they did not consider exhaust and exfiltration airflows.
In addition DCV systems interact with other systems and setpoints such as economizers and building pressurization setpoints.
However, the issue of building pressurization with DOAS is a detail that warrants careful attention.
An integrated building pressurization scheme should coordinate the fresh airflow rates to both the floors and stairs so they do not ultimately fight one another or drive smoke into areas intended to be safe havens for the occupants.
The building pressurization approach was recommended to be used in the event of a severe fire involving a substantial portion of one floor of the building, where windows were observed to be broken out (HAI/DCE 1996).
Building pressurization has often been touted as a means of protecting buildings against outdoor release of CBA.
Full browser ?