MAH_2019

Protocol for Conducting Measurements of ANSI/AARST MAH 2019 Radon and Radon Decay Products in Homes 5 4.0 TEST CONDITIONS REQUIRED 4.1 Closed-Building Protocol Requirements Closed-building conditions, as they are for occupied conditions in winter heating seasons or summer cooling seasons, are required when short-term test results are used for mitigation decisions. Closed- building conditions in accordance with Tables 4-A , 4-B and Exhibit 1 are required to be: a) initiated 12 hours prior to the test for tests lasting less than 4 days; and b) maintained throughout the test period for tests lasting 2 to 90 days. Table 4-A ESSENTIAL CLOSED-BUILDING PROTOCOL REQUIREMENTS Windows Keep closed on all levels of the building including areas not being tested Exterior doors (except for momentary entry and exit) Heating and cooling systems Set to normal occupied operating conditions with temperature settings between 65˚and 80˚ F (18˚ - 27˚ C) Systems that temporarily ventilate with outdoor air for seasonal comfort or energy savings Set to the lowest seasonal ventilation condition that occurs during the year Whole-house fans Do not operate Fireplaces (that burn solid, liquid or gas fuels unless a primary/normal source of heat for the building) Clothes dryers, range hoods and bathroom fans Avoid excessive operation Required building operation also includes components itemized for clarification in Exhibit 1 Note—Section B of the attached MAH Companion Guidance provides descriptions of ventilation systems. Table 4-B ADDITIONAL REQUIREMENTS FOR NEW CONSTRUCTION, RENOVATIONS AND REPAIRS All openings to the exterior (due to incomplete construction, structural defect or disrepair) These opening to the exterior shall be closed or sealed at least 12 hours prior to initiating the test Heating/cooling systems active and set to a normal occupied temperature These items shall be completed or installed at least 12 hours prior to initiating the test All windows and exterior doors installed with hardware and seals All insulation and exterior siding All wall and ceiling coverings to be completed including interior drywall or paneling; does not include decorative finishing of walls, floors or ceilings All fireplaces and fireplace dampers installed