In a recent year, nearly 2,700 people died and more than 15,000 were injured
because of fires that started in their homes. These fires resulted in property
losses of more than $3.5 billion. Children are particularly vulnerable. Each
year about 700 children under the age of 15 die of fire-related causes and about
400 of these deaths are to children under the age of 5 years. Most deaths occur
from fires that start at night while families are asleep. Four times as many
victims die from inhaling smoke and toxic gases as from burns.
You can prevent tragedies simply by testing and maintaining your smoke alarms and
practicing a fire escape plan. All smoke alarms in your house should be tested
once a month, and their batteries replaced annually. Every family should develop
a fire escape plan and practice it at least twice a year. The U.S. Consumer
Product Safety Commission (CPSC) recommends these measures because working smoke
alarms and a fire escape plan will increase your protection in case of a fire.
Every year in the United States, about 3,000 people lose their lives in residential fires. Most fire victims die from inhalation of smoke and toxic gases, not as a result of burns. Most deaths and injuries occur in fires that happen at night while the victims are asleep.
Properly installed and maintained smoke alarms in the home are considered one of the best and least expensive means of providing an early warning of a potentially deadly fire.
Place one smoke alarm on every floor and in each sleeping room.

Here is a link to follow to see how effective and important it is to have at least one smoke detector in a room.
http://www.firesafetycouncil.com/english/pubsafet/safact.htm
Some people may not know what to look for or how to install a smoke detector for there home; here is the what and how on buying and installing a smoke detector in your on home. Purchasing and Installing a Smoke Detector
A company called Silent Knight
provides fire alarms, they are one of the many companies out there to help provide a variety of fire detection devices.
A little information on the many differences of smoke detectors and they how the smoke detectors work. Information on the workings of Smoke Detectors