Accession Number:

ADA288246

Title:

Air Exchange Measurements in Army Buildings.

Descriptive Note:

Corporate Author:

COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER NH

Personal Author(s):

• Flanders, Stephen N.

Report Date:

1994-07-01

Pagination or Media Count:

35.0

Abstract:

Air exchange measurements in buildings are important for testing the effectiveness of the ventilation system and for characterizing air leakage in the building envelope when the ventilation is off. This report discusses such measurements in nine Army buildings-administrative, maintenance, barracks, hospital and laboratory build- ings-using a tracer gas method that entails releasing a tracer gas in an initial well-mixed concentration and then monitoring its concentration over time. The faster the tracer gas dilutes, the greater is the air change rate. ASTM Standard E741 offers tecliniques for tracer gas measurements in single-zone enclosures, but most Army buildings are multiple-zone enclosures. This study, looking at whether such buildings could approximate single-zone enclosures for tracer gas measurements, found that this is difficult. In addition, a number of buildings were detected in which the mechanical ventilation system was working at a fraction of design capacity.

Descriptors:

• *AIR FLOW
• *ARMY FACILITIES
• *VENTILATION
• MEASUREMENT
• BUILDINGS
• ALASKA
• WIND
• ATMOSPHERIC TEMPERATURE
• NEW YORK
• GAS ANALYSIS
• LEAKAGE(FLUID)

Subject Categories:

• Air Conditioning, Heating, Lighting and Ventilating
• Logistics, Military Facilities and Supplies

Distribution Statement:

APPROVED FOR PUBLIC RELEASE