Indoor Carbon Monoxide: A Case Study in England for Detection and Interventions to Reduce Population Exposure

Table 1

Issues/faults identified during investigation of CO alarm incidents, November 2011 to April 2012 (𝑛=104).

Issue identified	𝑁	%*
(1) Cooker defective	29	29.9
(2) Boiler defective	10	9.8
(3) Fire defective	1	25
(4) Misuse of cooker/cooking methods	11	10.6
(5) CO alarm faulty/low battery/wrongly sited	40	38.5

∗Denominator for issues 1, 2, and 3 changed depending on whether each gas appliance was reported as present and tested. Number of incidents where a gas cooker was reported as present and tested: 97; number of incidents where a gas boiler was reported as present and tested: 102; number of incidents where a gas fire was reported as present and tested: 4.