ESFR (Early Suppression Fast Response) is a high-performance sprinkler system designed specifically for warehouses with high-bay racking. Unlike standard sprinklers, an ESFR system can fully suppress a fire rather than merely control it, making it the de facto standard in Class A warehouses with 10 m+ clear height.
Class A standard
K-factor: 14–25
Operating pressure: 3.5–7 bar
No in-rack sprinklers needed
ESFR sprinkler systems are the primary fire safety standard in modern warehouses. They provide fast and effective fire suppression without the need for additional in-rack sprinklers.
How does ESFR work?
ESFR sprinklers discharge a large volume of water at high pressure (up to 7 bar) directly onto the fire source. The thermosensitive element activates faster than in standard sprinklers, ensuring a rapid response even with high-bay racking.
ESFR advantages over standard sprinklers
Standard sprinklers only control a fire and often require additional in-rack sprinkler installation. An ESFR system can fully suppress a fire from the ceiling, which means less complex installation and lower maintenance costs.
When is ESFR required?
ESFR is required when the warehouse clear height exceeds 7.5 m and high-bay racking systems are in use. Insurance companies frequently require an ESFR system as a prerequisite for issuing a policy.
Frequently Asked Questions
Are ESFR sprinklers mandatory in Class A warehouses in Latvia?
They are not legally mandatory, but virtually all new Class A projects are built with ESFR systems because insurers and international tenants (3PL, e-commerce) require them.
What is the difference between ESFR and standard sprinklers?
ESFR sprinklers discharge 3–5 times more water at higher pressure and activate faster. They can suppress a fire rather than merely control it. Standard sprinklers often require additional in-rack sprinklers.
How much does an ESFR system installation cost?
Installing an ESFR system in a warehouse costs approximately €15–€25/m², which is 30–50% more than a standard sprinkler system. However, no in-rack sprinklers are needed, which offsets the cost.