Under what condition should sidewall sprinklers not be used?

Sidewall sprinklers are typically utilized in locations where an overhead sprinkler system may not be effective, especially in areas with directional challenges or obstructions. However, they are not suitable for installation under sloped ceilings due to the way they disperse water. The design of sidewall sprinklers is optimized for flat or parallel ceilings; they project water in a specific pattern that may not adequately cover the space under a sloped ceiling. When the ceiling is sloped, the water from the sidewall sprinklers can run off toward the wall instead of dispersing effectively into the room, reducing their effectiveness in achieving adequate coverage.

In contrast, other environments such as basements, storage areas, and high ceilings may still be appropriate for sidewall sprinkler use, provided that the specific conditions and coverage requirements are met. These areas can accommodate the intended operation of sidewall sprinklers without the complications posed by sloped ceilings.