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During the testing period, maintain the following conditions to ensure valid measurement results:
All windows must be kept closed. All exterior doors must be kept closed, except for normal entry and exit. Windows and doors must be kept closed for a period of 12 hours prior to the device placement date and remain closed until the device is retrieved.
Whole house fans must not be operated. Window air conditioning units may only be operated in recirculation mode. Portable window fans must be removed from the window or sealed in place.
Fireplaces or combustion appliances, other than water heaters and cooking appliances, must not be operated unless they are your primary heat source.
Ceiling fans, portable air filters, portable de-humidifiers, portable humidifiers or window air conditioning units operating in recirculation mode must not be operated within 20’ of the measurement device.
If a device is placed in your unit, the measurement device must not be touched, tampered with, covered, removed or altered, and the location of the device must not be changed. Your HVAC system must be operated in the normal range – your thermostat should not be adjusted drastically, and your fan should be set in normal-mode.
Failure to maintain these conditions could result in an incorrect test result. Your assistance in helping to ensure a valid measurement is greatly appreciated, thank you!