COMPLIANCE WITH CLOSED HOUSE CONDITIONS BY OCCUPANT

In order for a short-term radon test to be valid, the US EPA requires that closed-house conditions be maintained during the test period, and for twelve (12) hours beforehand when the testing period is less than four (4) days. A summary of the EPA's definition of closed-house conditions is as follows: All external doors and windows must be kept closed. Doors may be opened only for the time required going in an out of the house. External-internal air conditioning exchange systems (other than a furnace or central air conditioning) must not be operated. Exhaust fans and window air conditioners should not be operated. Fireplaces and wood stoves should not be operated and the dampers should be kept closed. (Fireplaces and wood stoves can be operated only when they are the primary heat source.)

In addition, the detectors should not be touched, moved, or manipulated in any way as to interfere with their performance. Tamper indicating controls may have been installed, and the test results may be ruled invalid if closed-house conditions were not maintained or the detectors were disturbed during the testing period.

We are required to explain the closed-house conditions to a responsible occupant of the house to be tested or their designated representative prior to a short term screening test. If additional information is desired, please call.

LANCASTER HOME INSPECTIONS, INC. at (717)872-2600