What type of temperature sprinkler head is required when installed 5' away from a unit heater?

When determining the type of temperature sprinkler head required in proximity to a heat source such as a unit heater, it is essential to consider the potential for heat exposure and the need for the sprinkler to respond appropriately. In this context, a high temperature sprinkler head is the correct choice.

High temperature sprinkler heads are designed to activate at elevated temperature conditions, which is suitable when installed near a heat source like a unit heater. This type of sprinkler head typically has a higher activation temperature, which prevents unintended discharges that could occur if a sprinkler head with a lower activation temperature were to be used. By using a high temperature sprinkler head, you reduce the risk of the sprinkler activating due to the ambient warmth from the heater during normal operation, thereby ensuring that the system only responds to actual fire conditions.

In contrast, low temperature, standard temperature, and medium temperature heads are designed for environments without significant heat sources nearby. Installing these types of heads near a unit heater could lead to premature activation, which could cause water damage and lessen the effectiveness of the fire protection system. Therefore, a high temperature sprinkler head is the appropriate choice for an installation that is in close proximity to equipment that generates heat.