Can ESFR sprinklers be used in dry systems?

The use of Early Suppression Fast Response (ESFR) sprinklers in dry systems is contingent upon specific listing and approval for that service. The design and application of sprinklers must always adhere to the manufacturer's specifications and local fire codes. ESFR sprinklers are generally tailored for specific environments and applications, and not all ESFR models are suitable for dry pipe systems.

When a sprinkler is listed for use in a dry system, it means that it has been tested and approved to operate effectively under those conditions. Dry pipe systems, which contain pressurized air or nitrogen in the pipes until the sprinkler is activated, can pose unique challenges for sprinkler performance. Therefore, only those ESFR models that are explicitly listed and tested for dry service can be utilized in such systems.

This highlights the importance of reviewing the manufacturer's guidelines and the National Fire Protection Association (NFPA) standards to ensure compliance and safety in fire suppression systems.