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Positioning of Smoke and Heat Detectors

All smoke detectors have similar spacing requirements, heat detectors also all have similar spacing requirements although these are different to smoke detectors. According to BS5839 for general areas the spacing between any point in a protected area and the detector nearest to that point should not exceed 7.5m for a smoke detector and 5.3m for a heat detector.

The above are the maximum areas that can be covered by an individual detector. In order to ensure that coverage is provided into the corners of rooms and to ensure that there is no gap at the junction point of multiple detectors, spacings have to be reduced.