In which location would you most likely find a deluge sprinkler system installed?

A deluge sprinkler system is specifically designed for high-hazard areas where there is a risk of large-scale fires. Such systems are characterized by open sprinklers that are activated simultaneously when the system is triggered. This allows for a powerful and expansive water discharge, making them ideal for locations where fires could spread rapidly due to the presence of flammable materials or large volumes of stored goods.

An aircraft hangar is an excellent example of a setting that would utilize a deluge system, as it typically contains highly flammable aviation fuels and large aircraft that, if ignited, could result in catastrophic fires. In contrast, the other options illustrate environments where the fire risks are significantly lower, making standard sprinkler systems more appropriate. Residential homes, high-rise office buildings, and parking garages generally do not present the same level of fire hazard that necessitates the use of a deluge sprinkler system. Therefore, the installation of such a system in an aircraft hangar is the most logical and effective choice for fire protection in that specific context.