MALB_2014 with 1-21 Revisions

Normative Appendix A ANSI/AARST MALB-2014 with 1/21 Revisions A— Reporting Building Operating Conditions 11 Table A-2 Some Cities In This Climate Zone Note—Exact percentages will vary slightly depending upon location Melbourne, FL Tampa, FL Mobile, AL New Orleans, LA Houston, TX Brownsville, TX Phoenix, AZ Tucson, AZ n Hot Climate Zone 2 Includes portions of FL, LA, TX, AZ and many southern portions of North America. This data is based on New Orleans, LA 24 Hour Averages For dwellings and other 24 hour occupancies Operating Condition Prevailing Annually Heating Conditions 42% Cooling Conditions 42% Mixed Conditions 16% Normal Operating Condition • Virtually equal portions of the year for heating or cooling. Condition less likely to inhibit characterization of a radon hazard • Heating and air distribution systems active • No variance in outdoor air ventilation Additional Considerations Daytime Averages For non-residential occupancies Operating Condition Prevailing Annually School (prevailing across 9 months) Heating Conditions 25% 33% Cooling Conditions 42% 22% Mixed Conditions 33% 44% Normal Operating Condition • Cooling systems active. • Intermittent heating and cooling conditions. Condition less likely to inhibit characterization of a radon hazard • Heating conditions at least some portion of the test period. • No variance in outdoor air ventilation. Additional Considerations • Consider additional testing to evenly account for each condition or an Assessment of Occupied Versus Unoccupied Conditions .