Access control and building security upgrade
With Pentillion Construction, I helped coordinate an access-control and security-system upgrade for a commercial building. The work included access-controlled doors, elevator access, cameras, wiring routes, and the operational requirements needed by both the landlord and tenants.
The project was not just a matter of selecting hardware. The scope had to balance security, usability, cost, code requirements, tenant disruption, and long-term building operations. I helped define which access points needed to be controlled, what the system needed to do, and how the work could be coordinated across the security contractor, electricians, elevator company, automated door contractor, tenants, and landlord.
One of the key constraints was elevator access. The building needed more controlled access to certain areas, but a full elevator-control upgrade would have added cost and complexity beyond the practical scope of the project. I worked through the requirements with the contractor and helped shape a solution that controlled access where it was needed without overbuilding the system.
The project also required code interpretation around the building’s crossover floor. Because the crossover floor formed part of the life-safety and exiting strategy, the access-control approach had to preserve the required function of that floor rather than treating every door as a simple security device. That added an important check on the design: the system still had to support safe movement and code-required access while improving security.
I also coordinated wiring routes with the contractor and helped manage the system after installation. That included programming useful operational automations, such as event-based actions that supported day-to-day security and reduced manual steps for building management.
The result was a more practical access-control system that served landlord and tenant needs without turning the project into a larger elevator-modernization or building-wide security rebuild. It shows the value of defining the real operating requirements before selecting a technical solution, then coordinating the trades and code constraints needed to make the system work.
HVAC controls retrofit and system troubleshooting
With Pentillion Construction, I helped audit, explain, and coordinate upgrades to an older HVAC control system. The building had existing controls and hardware that could not simply be replaced all at once, so the project needed a clear understanding of what was already there before the new work could be planned.
Understanding the old system before replacing parts of it
My role was to bridge the gap between the existing controls, the HVAC contractor, the controls contractor, and the practical needs of the building. I reviewed and documented how the system operated, helped explain the existing logic, and supported the retrofit so new equipment could be integrated without losing compatibility with parts of the older setup.
The upgrade included four new heat pumps. Because I had built much of the internal understanding of the existing controls, I became a practical reference point during the work. The value knowing what equipment was present and helping the contractors understand how the old controls, operating logic, and building requirements fit together.
Troubleshooting the shaking air handlers
That same system knowledge carried into troubleshooting. The building had two large air handlers that were shaking under certain operating conditions, and the cause had not been identified.
One proposed path was to bring in an engineering audit to measure resonant frequencies using specialized equipment. That may have been needed eventually, but before jumping to that step, I worked through a more direct inspection of the system.
Looking for the real field condition
I checked likely mechanical causes, including whether the air-handler shafts appeared to be off balance, the dampening system, and used a 360 camera and thermal imaging camera to inspect areas that were difficult to access directly.
That investigation pointed toward a loose sheet-metal wall dividing the large duct that supplied hot and cold air to the building. Under certain airflow and pressure conditions, the loose partition deflected until it relieved the pressure differential, then snapped back, allowing the pressure to rebuild and repeat the cycle. This created a low-frequency pulsation that transmitted vibration into the air-handler area and surrounding building structure.
A logical conclusion
I documented the old controls, identified what still had to work, coordinated the contractors around the real operating logic, and investigated the field condition before assuming the next step had to be expensive or abstract.
The result was a building system that became easier to explain, upgrade, maintain, and hand off.
Fire panel relocation and life-safety retrofit
With Pentillion Construction, I helped coordinate a fire alarm system retrofit in an occupied commercial building. The existing fire panel was outdated and located inside a secure tenant area, which created access and operational constraints for building management, contractors, and emergency-related service work.
The project involved more than simply replacing equipment. The panel needed to be upgraded and relocated to a more appropriate building service area, while related alarm devices such as bells and pull stations also needed to be reviewed and upgraded as part of the broader retrofit.
I engaged multiple contractors to understand the available paths forward and help shape a practical scope. The work required coordination between the fire alarm contractor, security contractor, electrician, tenants, and building operations. Because the existing panel location was inside a secure space, access had to be planned carefully and coordinated with the affected tenant and other building users.
The crossover-floor requirements added another important layer. Because crossover floors form part of the building’s life-safety strategy, the access and fire alarm work had to be considered in that context rather than treated as a simple equipment swap. The retrofit needed to improve serviceability and bring the equipment into a better location while preserving the required life-safety function of the building.
The result was a more serviceable fire alarm system with the panel relocated out of the secure tenant space and related devices upgraded as part of the work. The project shows the coordination behind a relatively contained building-system upgrade: understanding the operational problem, checking the code-related constraints, aligning the right contractors, and completing the work without exposing tenants or building users to unnecessary disruption.
Enterphone data recovery and audio repair
A building’s Mircom TX3 enterphone failed, and the first risk was not just getting the hardware working again. The resident directory and system configuration also needed to be protected. Replacing the controller board without recovering the data could have turned a hardware failure into a larger setup and handoff problem.
I traced the failure through the power supply, transformer, door strike circuit, phone line, and controller board. The likely failure was in the board’s low-voltage power section, where a small surface-mount capacitor had burned.
Instead of immediately replacing the board and losing the configuration, I powered the damaged board with a current-limited DC bench supply. That let me bring the board up carefully, confirm that the internal 5V and 3.3V logic rails were stable enough to communicate, connect to the TX3 software, and recover the resident names and configuration before replacing the board.
After the new board was installed, I updated the configuration and verified the building functions tied to the panel. That included the postal lock input, door strike operation, grounding, phone-line settings, and relay behaviour. The goal was to leave the system in a known working state, not just swap the failed component.
There was also a call-audio issue where the caller’s voice became quiet after the call connected. I tested microphone gain, speaker level, DTMF sensitivity, and echo-reduction profiles. The issue appeared to be aggravated by sound reflecting inside the panel and around the speaker/microphone assembly, which could cause the echo reduction to clamp down unnecessarily.
I repaired and sealed the broken speaker enclosure and started working on a simple acoustic treatment around the microphone to reduce reflected traffic noise. It was a small repair, but it reflected the same troubleshooting approach as the board recovery: trace the system, protect the important data, verify the handoff, and keep looking when the first fix does not fully solve the user experience.
