Warehouse Protection with ESFR Sprinklers Keeps Safety at the Forefront

Modern warehouses are getting taller, aisles are getting tighter, and the pressure to maximize every cubic foot of storage space has never been higher. But as rack heights increase, fire protection gets more complicated, and the cost of getting it wrong goes up with it.

For designers, engineers, and facility owners working on high-piled storage projects or facing similar challenges, one of the biggest questions is whether you can protect the building from the ceiling alone or whether you’ll need in-rack sprinklers running through the storage racks. In-rack systems add cost, limit racking flexibility, and can slow construction timelines. The alternative is a ceiling-only ESFR (Early Suppression Fast Response) sprinkler system, such as Reliable’s FM Approved N28 ESFR sprinkler.

What Makes ESFR Different

Unlike spray sprinklers that control a fire and keep it in check until the fire department arrives, ESFR sprinklers are designed to suppress a fire by knocking it down fast, before it has a chance to grow.

They do this by delivering high-momentum water droplets that can penetrate the fire plume and reach the seat of the fire, even from ceiling height in a tall warehouse. It’s an aggressive, direct approach to fire protection, and it’s why ESFR sprinklers have become the go-to choice for high-piled storage applications.

The N28: Reliable’s Answer to Taller Buildings and Tighter Aisles

The Reliable N28T6 and N28T3 are pendent sprinklers with a K-factor of 28.0 (400), delivering more water at lower operating pressures.

What the N28 delivers:

• Ceiling heights up to 55 ft (16.8 m) with storage heights up to 50 ft ( 15.2 m): FM Approved as Quick Response Storage sprinkler (N28T6 only).
• Ceiling heights up to 48 ft (14.6 m) with storage heights up to 43 ft (13.1 m), with 4 ft (1.2 m) minimum aisle width: cULus Specific Application Listing.
• 3 in (75 mm) transverse flue spaces: cULus Specific Application Listing (N28T3 only).
• Lower operating pressure: A higher K-factor means less pressure is needed at the sprinkler, which can translate to smaller pipe sizes and reduced pump requirements.
• Durable fusible alloy solder link: No shipping protector required, which means less job site waste and faster installation.
• Now CE Certified.

Why ESFR Matters for Your Next Project

The warehouse and logistics market isn’t slowing down. E-commerce, cold storage, and large-scale distribution continue to drive demand for taller, denser facilities, and they all need fire protection that keeps pace.

For designers and engineers, the N28, which is now FM Approved and cULus Listed, offers more room to work within code requirements while keeping system costs in check. For purchasing agents, fewer in-rack sprinklers and smaller piping mean a more competitive bid and another layer of confidence. And for risk managers and building owners, ceiling-only ESFR protection means racking can be reconfigured without repiping the fire protection system and flexibility that pays off for the life of the building.

Ready to specify the N28 for your next warehouse project?

See Reliable’s ESFR Sprinkler System in Action

Watch how Reliable’s N28 ESFR sprinklers help maximize warehouse space while keeping fire protection at the forefront: N28 ESFR Sprinkler Video.

For a deeper dive into ceiling-only K28 and K34 ESFR protection strategies, check out our recorded webinar: Chasing the Storage Holy Grail

Have questions about the application or system design?