San Francisco High Rise

Well Planned EST3 to EST4 Upgrade Minimizes Downtime at a Two-Tower High-Rise

San Francisco High Rise

A two-tower high-rise property in San Francisco needed to modernize its fire alarm infrastructure by upgrading from EST3 to EST4 systems. With EST3 at end of life, property management wanted to avoid the risk of an unexpected system failure and instead move forward with a planned, controlled upgrade.

By partnering with Sciens, the property management team was able to take a proactive approach that minimized disruption, reduced risk, and ensured a smooth transition. Through detailed planning, equipment staging, and advance programming, Sciens completed the cutover with just a single day of downtime per building.

About the Property

This San Francisco property consists of two high-rise towers that required a carefully coordinated fire alarm system upgrade. Because the buildings remained operational throughout the project, the client needed a partner that could manage a complex system transition while maintaining confidence in the process from start to finish.

Challenges

The property’s existing EST3 fire alarm systems had reached end of life, creating a growing concern around long-term serviceability and reliability. Rather than wait for a failure that could lead to unexpected downtime and difficult repair scenarios, property management chose to move forward with a planned upgrade to EST4.

The challenge was not simply replacing legacy equipment. The client needed a partner that could evaluate both towers, build an efficient upgrade strategy, and execute the work with minimal disruption to building operations. Reducing downtime was a top priority, and every phase of the project needed to be carefully planned to avoid delays.

Outcomes

“I wanted to give your team a note of appreciation for the recent upgrade. As a large project goes for me, everything went well from the start of proposal to the completion this week. Also, want to commend Arash on his diligence and professionalism providing us with a product that I see as lasting many years. It’s been a pleasure working with you all. Thank you.” — Jeffery T.

Sciens began with a full review of both buildings and developed a detailed upgrade plan to minimize downtime and support an efficient cutover. Equipment was staged at each node in advance, and programmers prepared the systems weeks ahead of the transition, which helped streamline execution when it was time to switch over.

Drawing on experience with large, complex projects, Sciens created an approach aligned with the client’s operational needs while maintaining close communication throughout the project. The team also collaborated with service technicians across the company to better understand building conditions in advance, reducing delays and supporting a more efficient installation.

As a result of that planning and coordination, each tower was down for only a single day during cutover. The project delivered a controlled, proactive system upgrade that reduced risk, strengthened confidence in the long-term reliability of the fire alarm infrastructure, and reinforced the value of engaging an experienced partner early for complex upgrades in occupied high-rise environments.