Which groups should not have unvented room heaters installed?

To determine which groups should not have unvented room heaters installed, it is essential to consider the safety and regulatory guidelines regarding the use of such heating systems. Unvented room heaters are designed to operate without a direct venting system to the outside, which means that they can contribute to indoor air quality issues and increase the risk of carbon monoxide buildup if not properly managed.

In the context of the question, groups that should not have unvented room heaters installed typically include places where ventilation is inadequate, where the risk of asphyxiation or toxic gas buildup is significant, and spaces that house certain types of equipment or activities that generate or can be negatively impacted by combustion gases.

The correct choice identifies groups A, E, and I, which may encompass spaces such as sleeping areas, commercial kitchens, or other confined spaces where the use of unvented heaters can pose safety hazards due to a lack of proper air circulation and combustion gas management. These groups often have stricter safety regulations and require more controlled ambient environments to mitigate the risk of hazardous situations.

Adhering to these guidelines is essential for ensuring safety and maintaining good air quality in environments where people work and live.