- P.O. Box 1042 Ballston Lake, N.Y. 12019-1042
- Mon - Fri 09:00am - 06:00pm
- 518-320-2501
I write complete, project-specific HVAC Sequences of Operation (SOO) based on your mechanical design documents, equipment schedules, and control system requirements. Every SOO is written to be accurate, buildable, and immediately usable by controls contractors, commissioning agents, and facility operators — not a repackaged generic template.
The Sequence of Operations is the most critical control document on any HVAC project. It defines how every piece of mechanical equipment starts, operates, responds to changing conditions, and shuts down. A vague or generic SOO leads to field confusion, controls rework, commissioning failures, and costly startup delays. A clear, complete SOO — written by someone who understands both the design intent and how these systems actually behave in the field — keeps projects on track.
With hands-on experience serving as the Cognizant Engineer for all HVAC systems and chiller plants at a major industrial facility, I’ve interpreted, written, and validated SOOs for complex mechanical systems including central chiller plants, air handling units, variable air volume systems, hydronic loops, and building automation platforms. That field background is what separates an SOO written by a practicing engineer from one assembled by someone who has only seen the drawings.
Who need a complete, PE-authored SOO for inclusion in the design documents or for submittal review.
Who are responsible for both the design intent and the installed equipment and need an SOO that bridges both.
Who need a clear, unambiguous sequence to program from — not a three-paragraph narrative that leaves gaps.
Who don’t have dedicated controls engineers on staff but need a professional, complete SOO for their project.
Who want a clear operational document that supports long-term facility management and future troubleshooting.
I have commissioned chiller plants, central HVAC systems, and complex mechanical infrastructure. I understand how control sequences translate from paper to real-world equipment behavior — and where generic sequences fail.
Every SOO is written with the controls contractor and commissioning agent in mind. The language is clear, the logic is complete, and the edge cases are addressed — not left as “coordinate with controls contractor.”
I work from your actual mechanical drawings and equipment submittals. The SOO reflects your specific equipment, not a generic chiller plant or AHU template.
If you also need a Commissioning Plan, I can develop both documents together — ensuring the SOO and the functional performance tests are fully coordinated.
Controls schedules don’t have room for slow documentation. You get a clear delivery timeline and direct communication throughout.
Every SOO is delivered in a professional document format suitable for inclusion in design documents, controls submittals, or commissioning packages.
Based on the actual mechanical design, system configuration, and equipment — not boilerplate.
Ready for inclusion in design documents, controls submittals, or commissioning packages. Revisions are included.
Typically: mechanical drawings, equipment submittals, the controls point list (if available), and any project-specific requirements from the engineer of record or owner. If documents are not yet finalized, I can begin drafting the SOO based on design intent and update it as equipment selections are confirmed. A partial package is never a reason to delay.
Most SOOs are completed within 3–5 business days depending on system complexity and the number of operating modes required. Larger projects involving multiple AHUs, chiller plants, boiler systems, or integrated BAS sequences may require additional time. Timeline and deliverables are confirmed in writing before work begins.
A controls specification defines the equipment, hardware, and performance requirements for the control system. The SOO defines the logic — exactly how the system behaves under every operating condition: startup, shutdown, occupied and unoccupied modes, setpoint offsets, alarm states, and safeties. Both documents are required for a complete controls package. AET develops both independently or in coordination with the engineer of record.
Yes — and this is one of the most common engagements. Many design packages include only a brief narrative or omit the SOO entirely, leaving the controls contractor to interpret or improvise. AET specializes in developing full, commissioning-grade SOOs that bridge the gap between design intent and real-world system behavior, with PE-licensed engineering authority behind every document.
AET develops SOOs for virtually all commercial and industrial HVAC systems, including:
Yes. All SOOs are written to support functional performance testing, TAB procedures, and commissioning documentation. Each operating mode is clearly defined so the commissioning agent has a documented benchmark to test against — not a field interpretation. This is a direct result of AET’s background in advanced commissioning as well as SOO development.
Yes. Reasonable revisions are included in the scope. If equipment selections change, the controls contractor needs additional detail, or commissioning identifies gaps, AET updates the SOO to keep it accurate and field-ready throughout the project lifecycle.
Yes. AET routinely coordinates with controls integrators, commissioning providers, and mechanical contractors to ensure the SOO is clear, implementable, and aligned with the BAS programming strategy. This includes participation in controls coordination meetings and written markup review of BAS programming submittals.
Yes. Many contractors bring AET in mid-construction when an unclear or missing SOO is delaying BAS programming or equipment startup. A clear, field-ready SOO can typically be delivered within 3–5 business days to get the project moving again.
Yes. As a licensed Professional Engineer in New York, New Jersey, and Maine, AET can provide PE-stamped SOOs when required by the owner, Authority Having Jurisdiction (AHJ), or design team. This is a significant differentiator — most controls contractors and commissioning firms cannot stamp engineering documents.
Use the contact form at the bottom of this page or call 518-320-2501. Provide your project documents and I will review the scope, confirm a timeline, and deliver a fixed-fee proposal. Most proposals are turned around within one business day.
If your project needs a complete, accurate, field-ready HVAC Sequence of Operations, I can develop a project-specific document that supports controls programming, commissioning, and long-term facility operation.