This is a very tough situation, and unfortunately, not uncommon in NYC. You're right, the interplay between older building codes and newer fire alarm requirements can create significant cost burdens. Here's a breakdown of how you might approach this, and what others in similar situations have done

Understanding the FDNY Position & Relevant Codes:
2014 NYC Building Code & Fire Code

You need to carefully review the specific sections of the 2014 NYC Building Code (specifically Chapter 9 - Fire Protection) and the 2014 NYC Fire Code related to fire alarm systems and secondary power sources. Your architect/engineer should be well-versed in these.

NYC DOB Interpretation

The FDNY interpreting the code is just as crucial as the code itself. They often have specific interpretations that go beyond the literal wording. This is where understanding their reasoning is vital.

ATS Requirement

The Automatic Transfer Switch (ATS) requirement is indeed designed to switch the fire alarm system to a reliable secondary power source (usually a generator) when the primary power fails.

Generator Justification

The FDNY's rationale is based on ensuring life safety. They want a highly reliable power source for the fire alarm during extended power outages.

Pre-2022 Code Cycle

Since your initial application was filed before the 2022 code cycle, you are indeed held to the 2014 codes in effect at that time.

Potential Strategies & Alternatives


Challenge the FDNY Interpretation (with Professional Support)



Detailed Code Analysis

Have your architect/engineer prepare a comprehensive code analysis demonstrating that the existing system meets the intent of the code, even without a generator. Focus on the reliability of the existing electrical service.

Documentation of Building's Electrical Reliability

Gather data on the building's historical power reliability. If the building rarely experiences outages, you might have a stronger argument.

Professional Engineer Letter

A letter from a licensed professional engineer (PE) arguing for an alternative solution, based on the specific circumstances of your building, carries significant weight with the FDNY. This letter should directly address why a generator is not essential and why an alternative provides equivalent or better life safety.

Meeting with FDNY

Request a meeting with the FDNY plan examiners to present your case and discuss alternative solutions. Be prepared to thoroughly explain your reasoning and answer their questions. This is often a necessary step.2.

Explore Alternative Secondary Power Options (UPS/Battery with Modifications)



High-Capacity UPS System

While you say batteries are not acceptable, this might depend on the type and capacity of the battery system. A Uninterruptible Power Supply (UPS) designed for emergency power with a substantial battery bank could be a viable alternative, especially if you can demonstrate its reliability. It needs to meet the NFPA 72 requirements.

Address FDNY Concerns

You need to specifically address the FDNY's concerns about battery-based systems, which usually revolve around:

Maintenance

Demonstrate a robust maintenance plan for the batteries (regular testing, replacement schedule).

Capacity

Prove the batteries have sufficient capacity to power the fire alarm system for the required duration (usually 24 hours in supervisory mode + 5 minutes in alarm).

Supervision

Implement a system to monitor the battery's health and charge level and provide alerts if there are any issues.

Consider a "Hybrid" System

Could you combine a smaller generator (if feasible) with a high-capacity UPS? The generator could provide power for extended outages, and the UPS could provide immediate backup and bridge the gap while the generator starts.3.

Staged Approach/Phased Implementation



Minimize Scope

Can you minimize the scope of the fire alarm upgrade to only the areas absolutely required by the code? This might reduce the load on the secondary power system, making a UPS more feasible.

Future Proofing

Plan for a future generator installation, but implement the fire alarm upgrade now with a UPS, with provisions in place to connect to a generator later. This requires very careful planning and coordination with the FDNY.4.

Code Variance



Formal Variance Request

In rare cases, you can apply for a formal code variance, arguing that strict compliance with the code would create an undue hardship without a corresponding increase in life safety. This requires a compelling argument and significant justification. This is a long shot, but worth considering if other options fail.5.

Cost-Effective Generator Options (Explore All Possibilities)



Smaller Generator

Instead of a full building-sized generator, could you install a smaller generator dedicated solely to the fire alarm system? This would significantly reduce the cost and complexity.

Outdoor Installation

Can the generator be installed outdoors (on a roof, in a courtyard, etc.) to avoid the costs associated with interior installation (ventilation, noise attenuation, etc.)? Check zoning regulations and noise ordinances.

Lease/Rent a Generator

While not ideal for long-term reliability, could you lease/rent a generator during extended power outages as a temporary solution (while pursuing a more permanent fix)?

Key Considerations



Documentation is King

Everything needs to be meticulously documented: code analysis, engineering calculations, alternative solutions, maintenance plans, etc.

Professional Expertise is Essential

You need a qualified architect, engineer, and fire alarm contractor with experience navigating NYC's complex codes and FDNY requirements. Don't cut corners on these professionals.

Communication is Critical

Maintain open and consistent communication with the FDNY throughout the process. Understand their concerns and be willing to address them.*

Early Consultation

The sooner you engage with the FDNY, the better. Bringing them into the process early can help you avoid surprises and wasted effort.

In conclusion: There is no magic bullet here. This will require a strategic approach, a thorough understanding of the codes, strong professional expertise, and a willingness to negotiate with the FDNY. Good luck! Flag for review