Every home should have smoke and carbon monoxide detectors. They are life savers. Most contemporary furniture and furnishings are made from synthetic materials which burn faster. Smoke and fire detectors give you additional time to escape in the event of an emergency.
BRK smoke alarms are available in a variety of models. Additionally, they have a technology to help distinguish between nuisance cooking alarms and a real fire emergency. BRK hardwired smoke and carbon monoxide alarm has a 10-year battery backup that allows it to function in the event of a power outage. They are available at hardware stores.