Scope01
Rooftop-unit replacement
RTU scopes planned around equipment selection, curb compatibility, lifting access, roof protection, electrical service, gas, controls, condensate, outside air, shutdowns, startup, and turnover.
Commercial priority · Greater St. Louis
Commercial HVAC Contractor in St. Louis
Coordinate equipment replacement, distribution, controls, power, drainage, lifting, startup, and occupied-building constraints as one documented commercial HVAC scope.
Occupied-property planning
Written scope + assumptions
Punch + photo closeout
Commercial first
Buildings, facilities, multifamily properties, and substantial component scopes are prioritized.
Bid-ready clarity
Available documents, interfaces, assumptions, access, and closeout needs are organized before award.
Qualified residential too
Residential projects are considered when they are substantial, planned, and within this service.
Commercial HVAC capabilities
Component work with the interfaces included.
These are the substantial, planned scopes Vulcan is built to review. Final inclusions depend on the property, available information, field conditions, jurisdiction, and written proposal.
Scope02
Packaged and split systems
Planned replacement of commercial packaged and split equipment with indoor and outdoor locations, refrigerant piping, drainage, power, controls, access, and restoration clearly assigned.
Scope03
Air-distribution upgrades
Substantial duct, diffuser, return-air, zoning, and air-balance needs documented alongside the equipment scope so a new unit is not expected to solve an unaddressed distribution problem.
Scope04
Controls coordination
Thermostats, sensors, zoning, equipment interfaces, sequences, and any building-control connection requirements identified before procurement and verified during startup.
Scope05
Ventilation and exhaust
Outside-air, make-up-air, and exhaust needs included where they are part of the defined replacement or upgrade, with roof and exterior openings coordinated across trades.
Scope06
Multi-unit replacement programs
Repeatable equipment replacement scopes for multifamily and commercial portfolios, organized around unit data, access, tenant communication, phasing, commissioning steps, and consistent records.
High-intent project review
Go deeper on the exact project type.
These focused pages organize the decisions, inputs, interfaces, and proposal details for substantial commercial HVAC projects that need more detail than a general capability list.
Before comparing bids
Define the decision—not only the price.
Commercial proposals become easier to compare when the owner first identifies the operating outcome, known conditions, interfaces, and acceptable assumptions.
What problem must the system solve?
Comfort complaints, capacity, ventilation, controls, noise, humidity, operating cost, reliability, and end-of-life risk point to different scopes. Start with the owner’s measurable outcome.
Is replacement truly like-for-like?
Existing equipment data is only a starting point. Building use, envelope changes, internal loads, ventilation needs, distribution, and electrical capacity can affect the responsible replacement plan.
How will the building stay operational?
Shutdown windows, temporary conditions, tenant notices, roof or equipment-room access, lifting, delivery, noise, dust, and after-hours work should be decided before the schedule is promised.
Who owns each interface?
Curbs, roofing, structural review, electrical feeds, gas, condensate, controls, ceilings, wall openings, testing, and startup need named responsibility rather than assumptions between bids.
Information that improves the bid
Bring the property, constraints, and target outcome.
Complete information reduces contingency, exposes trade interfaces, and makes the schedule more credible. Send what is available; missing items can be identified during review.
- Property use, occupied hours, comfort or reliability concerns, and target outcome
- Equipment schedules, nameplate photos, service history, controls information, and prior studies
- Available mechanical plans, test-and-balance reports, load information, or tenant requirements
- Roof, ceiling, equipment-room, loading, crane, and after-hours access constraints
- Electrical, gas, condensate, curb, ventilation, controls, and distribution conditions
- Budget range, procurement deadline, shutdown windows, phasing, and turnover requirements
A clearer commercial proposal
Know what the number includes.
The final proposal—not this page—controls the work. Before award, verify the included systems, limits, responsible trade parties, approvals, assumptions, schedule, and turnover requirements.
Where a license, permit, design professional, utility approval, test, or inspection is required, the written scope should identify the responsible party and what is included for the actual jurisdiction.
01
Existing and proposed equipment identified by capacity and key performance requirements
02
Basis for selection plus documented assumptions about building load and use
03
Distribution, ventilation, controls, power, gas, drainage, curb, and roof interfaces
04
Access, lifting, protection, shutdown, temporary-condition, and phasing plan
05
Demolition, disposal, restoration, exclusions, allowances, and alternates
06
Startup, testing, balancing where included, training, product data, and closeout records
One accountable process
From project information to useful closeout.
01
Send the building information
Share the address, property use, requested outcome, available documents, timing, budget, and operational constraints.
02
Verify conditions and fit
The team reviews what is known, identifies missing information, and determines what must be field-verified before responsible pricing.
03
Compare a written scope
Inclusions, assumptions, allowances, exclusions, schedule logic, responsible parties, and change handling are put in writing.
04
Coordinate through closeout
Approved work moves through access, construction, communication, punch, photos, and useful turnover records with one project lead.
Project fit
Commercial priority. Residential considered.
Commercial + multifamily
Vulcan prioritizes planned commercial and multifamily equipment replacements and substantial HVAC upgrades that benefit from coordinated roof, electrical, access, phasing, and closeout planning.
Qualified residential
Qualified residential whole-system replacements and substantial HVAC upgrades are considered. Emergency no-cool/no-heat dispatch and isolated component repairs are not the focus.
See the combined HVAC pageCommercial HVAC questions
Scope questions, answered plainly.
Do you replace commercial rooftop HVAC units?+
Yes. RTU replacement scopes can include equipment, curb and roof interfaces, lifting, power, controls, gas, condensate, startup, and closeout. The exact inclusions are confirmed after available conditions are reviewed.
Can you coordinate HVAC with roofing and electrical work?+
Yes. Those interfaces are a primary reason to plan the work under one documented scope. Vulcan can coordinate the sequence while identifying the responsible trade contractor for each regulated portion.
How do you determine the right replacement equipment?+
The team reviews existing equipment data, building use, known performance issues, available plans or studies, distribution, ventilation, controls, utilities, access, and the owner’s operating goals. Additional design or engineering may be required for some projects and should be identified before award.
Do you provide emergency HVAC repair?+
Vulcan focuses on planned whole-system replacement and substantial upgrades, not emergency dispatch or isolated component repair. Submit the property and equipment details so fit can be confirmed.
Is residential HVAC available?+
Yes. Commercial work is prioritized, but qualified residential whole-system replacement and substantial upgrade projects across Greater St. Louis are considered.
Other commercial systems
Keep connected scopes connected.
Greater St. Louis · projects reviewed for fit
Start with the building and the outcome.
Send the address, available documents, current condition, target date, and what must stay operational. Vulcan will review the commercial HVAC scope and confirm next steps.