According to the National Fire Protection Association (NFPA), minimum protection requires a smoke detector outside each sleeping area and on every level of the home, including the basement. On floors without bedrooms, detectors should be installed in or near living areas such as dens, living rooms, or family rooms.
We strongly suggest smoke detectors be installed inside every bedroom; this is a code requirement for new homes but older homes may need additional smoke detectors added. For the hearing impaired, there are smoke detectors that flash a strobe light in addition to sounding an audible alarm.
For extra protection, NFPA suggests installing additional detectors in dining rooms, furnace rooms, utility rooms, and hallways. Smoke detectors are not recommended for kitchens, bathrooms, garages, or attics and other unheated spaces – where cooking fumes, steam, humidity and temperature changes might affect a detector's operation.