Henry Fire Department has teamed up with the state of TN to offer free smoke alarms and professional installation at no cost to households in our service area. To request a free smoke alarm we ask that you fill out this form. A member of our team will then contact you within the next 6 months for a installation date. We try doing this twice a year. Each detector has a battery life of 10 years so no need to change the batteries twice a year. We still reques that you test your alarms twice a year for the safety of your household.