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Main Title Radon Mitigation in Schools: HVAC Systems in Schools Tend to Have a Greater Impact on Radon Levels Than HVAC Systems in Homes.
Author Leovic, K. W. ; Craig, A. B. ; Saum., D. W. ;
CORP Author Environmental Protection Agency, Research Triangle Park, NC. Air and Energy Engineering Research Lab. ;Infiltec, Falls Church, VA.
Publisher c1990
Year Published 1990
Report Number EPA/600/J-90/009;
Stock Number PB90-219718
Additional Subjects Radon ; School buildings ; Environmental engineering ; Radioactive materials ; Houses ; Comparison ; Air conditioning ; Heating ; Ventilation ; Design criteria ; Operating ; Pressure distribution ; Reprints ; Indoor air pollution ; Air pollution sampling ; Soil gases ; Stationary sources
Library Call Number Additional Info Location Last
NTIS  PB90-219718 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 6p
Abstract The first part of the two-part paper discusses radon entry into schools, radon mitigation approaches for schools, and school characteristics (e.g., heating, ventilation, and air-conditioning--HVAC--system design and operating) that influence radon entry and mitigation system design. The second part discusses specific mitigation systems that were installed by the U.S. EPA in four Maryland schools. HVAC systems in schools vary considerably and tend to have a greater impact on pressure differentials--and consequently on radon levels--than do heating and air-conditioning systems in houses. If the HVAC system induces a negative pressure relative to the subslab area, radon can be 'pulled' into the building. If the HVAC system pressurizes the building, it can prevent radon entry as long as the fan is running. However, school HVAC systems are normally set back or turned off on evenings and weekends and, even if the HVAC system pressurizes the school during operation, indoor radon levels may build up during the setback periods. The primary mode of radon entry into a school with significantly elevated radon levels is normally from soil gas that is drawn in by pressure differentials between the soil surrounding the substructure and the building interior.
Supplementary Notes Pub. in American Society of Heating, Refrigeration and Air Conditioning Engineers Jnl., v32 n1 p40, 42, 44, 45, Jan 90. See also PB90-219700. Prepared in cooperation with Infiltec, Falls Church, VA.
NTIS Title Notes Journal article Feb 88-Nov 89.
Title Annotations Reprint: Radon Mitigation in Schools: HVAC Systems in Schools Tend to Have a Greater Impact on Radon Levels Than HVAC Systems in Homes.
Category Codes 68F; 68A; 89B
NTIS Prices PC A02/MF A01
Primary Description 600/13
Document Type NT
Cataloging Source NTIS/MT
Control Number 019412501
Origin NTIS
Type CAT