MAMF_with 1-21 Revisions

Normative Appendix A ANSI/AARST MAMF-2017 with 1/21 Revisions A— Reporting Building Operating Conditions 5 Table A-8 n Subarctic Climate Zone 8 The utmost northern portions of North America. This data is based on Fairbanks, Alaska 24 Hour Averages For dwellings and other 24 hour occupancies Operating Condition Prevailing Annually Heating Conditions 100% Cooling Conditions - Mixed Conditions - Normal Operating Condition • Heating Condition s Condition less likely to inhibit characterization of a radon hazard • Heating and air distribution systems active Additional Considerations Avoid radon testing under extreme weather conditions, such as during periods when outdoor temperatures are continually < 0˚ F (-18˚C) Daytime Averages For non-residential ocupancies Operating Condition Prevailing Annually School (prevailing across 9 months) Heating Conditions 92% 100% Cooling Conditions - - Mixed Conditions 8% - Normal Operating Condition • Heating active Condition less likely to inhibit characterization of a radon hazard • Heating and air distribution systems active Additional Considerations Avoid radon testing under extreme weather conditions, such as during periods when outdoor temperatures are continually < 0˚ F (-18˚C)