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During testing: <br />1. Exterior windows and doors, fireplace and stove doors shall be closed, but not sealed, beyond the intended <br />weatherstripping or other infiltration control measures; <br />2. Dampers including exhaust, intake, makeup air, backdraft and flue dampers shall be closed, but not sealed <br />beyond intended infiltration control measures; <br />3. Interior doors, if installed at the time of the test, shall be open, access hatches to conditioned crawl spaces and <br />conditioned attics shall be open; <br />4. Exterior openings for continuous ventilation systems and heat recovery ventilators shall be closed and sealed; <br />5. Heating and cooling systems, if installed at the time of the test, shall be turned off, and <br />6. Supply and return registers, if installed at the time of the test, shall be fully open. <br />