CO2 / Smoke / Heat
By mixing the multiple types of alarms to match the location of the home improved coverage is provided while reducing false alarms.
The newest combo alarms talk, warning inhabitants of the particular danger and giving encouragement to leave the area.
In addition, electric powered alarms have battery backup during an electrical outage and the battery requires less frequent changes. Electric powered alarms in bedrooms must be protected by an arc fault circuit interrupter. Each bedroom is required to have smoke detector protection.
The mounting locations of alarms are very important. Rooms contain "dead air" spaces. Be sure to read the instructions before choosing a location.
If you're remodeling, protect the sensing element with the enclosed shower cap to prevent dust contamination. Remove the cap when construction is completed.