The Problem

A building can pass every inspection, receive a certificate of occupancy, and still not work the way it was designed to. Equipment is installed, controls are connected, power is on — but the systems have never been rigorously verified to operate as an integrated whole under actual load conditions. Sequences of operation that looked right on paper were implemented incorrectly by the controls contractor. Equipment was substituted during construction without updating the design. Dampers, valves, and sensors are installed but never calibrated or tested through their full range of operation.

The result is a building that the owner accepts as “complete” but that quietly underperforms from day one. Comfort complaints start immediately. Energy consumption exceeds projections. Warranty disputes begin before the first year is up. And the design engineer, the contractor, and the controls integrator all point at each other.

Proper commissioning prevents this. But not all commissioning is created equal.

What Functional Commissioning Is

Functional commissioning is the process of systematically verifying that a building’s mechanical, electrical, plumbing, and control systems are installed correctly, calibrated properly, and perform according to the design intent under all expected operating conditions. It begins during the design phase and extends through construction, startup, and the initial period of occupancy.

The emphasis is on functional performance — not just “does it turn on,” but “does it do what it’s supposed to do, in every mode of operation, under varying loads and conditions.” This means testing heating mode, cooling mode, economizer operation, morning warmup, unoccupied setback, failure modes, lead/lag sequencing, alarm responses, and every other scenario the system was designed to handle.

Commissioning also serves as a quality assurance process for the owner. It provides independent, third-party verification that the systems the owner paid for are actually delivering the performance they were designed to provide.

Our Approach

Design Phase Review — We engage early to review the basis of design, mechanical drawings, control sequences, and specifications. This is where many commissioning issues can be prevented entirely. We identify ambiguities, gaps, or conflicts in the design documents before construction begins — saving time and money that would otherwise be spent resolving them in the field.

Construction Phase Monitoring — During construction, we conduct periodic site visits to observe installation quality, verify that equipment matches specifications, and flag issues before they get buried behind walls or above ceilings. We review submittals with an eye toward how equipment selections affect system performance, not just spec compliance.

Pre-Functional Testing — Before functional testing begins, we verify that each piece of equipment has been properly installed, started up, and is ready for integrated testing. This includes verifying sensor calibration, valve and damper stroke, electrical connections, and control point mapping.

Functional Performance Testing — This is the core of the process. We develop and execute detailed test procedures for every system and sequence of operation, documenting pass/fail results and identifying deficiencies that need correction. We test under realistic conditions and push systems through their full range of operation.

Issue Resolution & Verification — We track every deficiency through to resolution, verify corrections, and retest as needed. We don’t sign off until the systems are actually performing correctly.

Documentation & Turnover — We deliver a comprehensive commissioning report documenting all testing, results, and resolutions. We also work with the design team and contractor to ensure that the owner’s facility team receives accurate as-built documentation and training on their systems.

Why Our Background Matters

Here’s the difference between a commissioning agent who checks boxes and one who catches real problems: understanding the design intent.

Many commissioning providers came up through the controls trade or the testing and balancing discipline. They’re skilled at executing test procedures and verifying point-to-point functionality. But when a sequence of operation is technically “working” yet fundamentally flawed in its logic — delivering the wrong result under certain conditions — they may not catch it, because they’re testing compliance with the written sequence, not evaluating whether the sequence itself is correct.

We bring over 22 years of HVAC design experience to the commissioning process. We’ve designed the kinds of systems we’re now testing. We understand why a particular control strategy was chosen, what tradeoffs were made, and where the common failure points are for each system type. When we review a sequence of operations, we’re not just asking “is this implemented correctly?” We’re asking “is this the right approach?”

This also makes us more effective at working with design teams and contractors. We speak the same language, we understand the pressures they’re under, and we approach the process as a collaborative quality assurance effort — not an adversarial gotcha exercise. The goal is a building that works, not a list of blame.

Who This Is For

• Building owners who want independent assurance that their investment will perform as designed
• Owner’s representatives managing complex construction projects
• Architects and construction managers who need a commissioning authority they can trust to be thorough and constructive
• Healthcare, higher education, laboratory, and mission-critical facility owners where system performance isn’t optional
• Any project where commissioning is required by code, LEED, or the owner’s project requirements