Short Term test kits do not expire as long as they are properly stored. Proper storage conditions are an indoor, climate controlled environment where the temperature is between 40 and 80 degrees Fahrenheit and a relative humidity of 50% or less.
Note: while the kit may not expire, some information may become outdated, such as the postage needed to send back your kit. You can find current instructions here and current shipping recommendations here.
Long Term (Alpha Track) test kits generally have a shelf life of about one year. The kit will be labeled with a white sticker stating the expiration date. If you have any concerns about your kit being expired, please contact us with your Test Kit Serial.
Radon in Water test kits do not expire.