How many feet from the end of a corridor shall a smoke detector be placed?

Asked By: Pepe Kreuzholz | Last Updated: 6th February, 2020
Category: home and garden smart home
4.5/5 (47 Views . 16 Votes)
Smoke detectors do not have a listed spacing. They have a recommended spacing of 30 feet between detectors. However, smoke detectors can be installed up to 41 feet apart in corridors up to 10 feet wide. The main fact to remember is that all points on the ceiling must be within 21 feet of the detector.

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Also asked, what is the coverage area for smoke detector?

In compliance with the National Fire Protection Association (NFPA), smoke alarms will cover a radius of 21 feet, and an area of coverage of 1,385 square feet. The maximum distance between two smoke alarms should be 30 feet. If a hallway is greater than 30 feet, a smoke alarm must be installed at each end.

Secondly, where should a smoke detector be placed on a ceiling or wall? Smoke alarms should be installed at least 10 feet (3 meters) from a cooking appliance to minimize false alarms when cooking. Mount smoke alarms high on walls or ceilings (remember, smoke rises). Wall-mounted alarms should be installed not more than 12 inches away from the ceiling (to the top of the alarm).

Keeping this in view, how close can a smoke detector be to a return air grille?

NFPA 72 recommends installing smoke detectors a minimum of 3 feet from any air supply or return air grill. They may need to be installed farther away when air velocity is higher than normal.

What is the maximum mounting height of a smoke detector?

According to Section 5.7. 3.2, NFPA 72, 2007 Edition, spot-type smoke detectors can be mounted either on the side wall or ceiling. When using the side wall, mount the device no closer than 4 inches from the ceiling. The maximum distance is 12 inches.

29 Related Question Answers Found

Where should smoke alarms not be placed?

Do not install a Smoke Alarm directly over the stove or range. Clean a laundry room unit frequently to keep it free of dust or lint. Near fresh air vents, ceiling fans, or in very drafty areas. Drafts can blow smoke away from the unit, preventing it from reaching sensing chamber.

How many smoke detectors can you have in one zone?

Any conventional panel zone will be support up to 20 numbers of detectors. Loop word use in addressable panel. Loop detector capacity is depends upon panel manufacturer and its type of protocol. Some addressable loop support 525 devices or some support 126 devices,.

What is the maximum floor area that one heat detector can cover?

With heat detectors this figure is 7.5m x 7.5m, giving an area of coverage of 56m² per device which is rounded down to 50m². BS 5839 states that detectors should be sited no less than 0.5m from a wall.

Which type smoke detector is best?

Best smoke detector overall: First Alert Smoke and Carbon Monoxide Alarm. Best hardwired smoke detector: Kidde Smoke Alarm Dual Sensor. Best dual-sensor smoke detector: First Alert Photoelectric and Ionization Smoke Alarm.

Can you cover smoke detectors?


Fortunately, it's easy to cover a smoke detector and prevent it from going off at an inopportune time. Just place a strip of painter's tape over the unit's sensor chamber, or wrap it up with a shower cap or plastic bag and secure it with a rubber band.

Can you mount a smoke detector vertically?

1 Answer. You can mount them vertically, but they have to be installed 4-12 inches (spacing usually on the instructions) from the ceiling. So it might be better to put in on the column than the beam, depending on how large that beam is.

Do duct detectors go on supply or return?

The International Mechanical Code requires a duct smoke detector in the return for units over 2000 cfm and requires a detector in the supply duct for systems over 15,000 cfm. Many designers require duct detectors in the supply and return in an attempt to meet both conflicting requirements.

How many devices can be on a fire alarm loop?

The standard large panel will be able to handle four loops or circuits, and each loop accommodates 127 to 256 devices. Therefore, depending on what panel and protocol you are using, if you multiply that by four, you will get either 508 or 1024 devices.

What factors determine the response time of a smoke alarm?


It is important that fire size and growth rate, smoke characteristics, ambient temperature, ventilation system induced air flows, and detector response characteristics be considered, as each affects the ability to detect a fire within the time frame desired.

When installing a fire detector What is the minimum distance you can put it from another material?

Wall-mounted alarms should be installed not more than 12 inches away from the ceiling (to the top of the alarm). If you have ceilings that are pitched, install the alarm within 3 feet of the peak but not within the apex of the peak (four inches down from the peak).

Do smoke detectors detect electrical fires?

Ionization Smoke Alarms are able to quickly detect fast moving fires. Think of a candle catching a curtain on fire- it happens quickly. A Photoelectric Smoke Alarm is quicker in sensing a slower, smoky fire- such as an electrical fire that starts within your walls.

Where do you put a smoke and heat detector?

Placing of smoke alarms and heat alarms
  1. Alarms should be sited on the ceiling, as centrally as possible within the room/area they are installed.
  2. Site 300mm away from walls and light fittings – this is to ensure that they are away from any 'dead air' spaces that occur in corners and spaces where the airflow may be blocked.

How close can a smoke detector be to a ceiling fan?

Place smoke detectors at least 3 feet from ceiling fans.

Where do you put a duct smoke detector?


NFPA 90A requires duct smoke detectors to be located in the supply duct downstream of air filters and ahead of any branch connections.

How high should CO detectors be mounted?

In order to ensure that your home has maximum protection, it's important to have a CO detector on every floor. Five feet from the ground. Carbon monoxide detectors can get the best reading of your home's air when they are placed five feet from the ground. Near every sleeping area.