Commercial rooftop HVAC equipment on a low-slope roof in Greater St Louis.
Commercial first · residential accepted · Greater St Louis

HVAC replacements planned around comfort, access, and operations.

Whole-system replacements, rooftop units, distribution, controls, and substantial HVAC upgrades for commercial, multifamily, and residential properties.

Project fit

Commercial buildings · Multifamily properties · Qualified residential projects · $15k minimum · Typical project $25k–$250k

Qualified project review

Start your HVAC scope

Commercial projects prioritized. Qualified residential projects accepted. $15k minimum.

Step 1 of 2
Service(s)*

What we do

  • Commercial and residential equipment-replacement scopes
  • RTU, curb, roofing, lifting, electrical, and drainage coordination
  • Distribution, controls, access, shutdown, and phasing plans
  • Startup, punch, photos, and closeout records

What we don't do

  • Emergency no-cool or no-heat dispatch
  • Minor maintenance or isolated component repair
  • Work outside Vulcan’s six listed service categories
  • Equipment-only sales without a coordinated installation scope

HVAC project types

Commercial-first HVAC scopes in Greater St Louis.

Commercial and multifamily properties are the priority. Qualified residential projects are accepted when the scope fits.

Commercial RTU replacement

Equipment, curb and roof interfaces, lifting access, power, controls, drainage, shutdowns, and startup planned together.

Residential system replacement

Complete heating and cooling replacement scoped around equipment, distribution, venting, drainage, controls, access, and startup.

Whole-building HVAC upgrades

Equipment and distribution scopes based on building use, existing conditions, access, comfort goals, and operating requirements.

Multifamily HVAC programs

Phased system replacement for apartment and multi-building properties with repeatable documentation and closeout.

How we scope it

Give us enough to price the real job.

A useful proposal starts with current conditions, access, documents, constraints, and the result the owner needs.

Licenses + permits: regulated work is performed or managed by appropriately licensed contractors. Required credentials, registrations, permits, and inspection responsibilities are confirmed for the project jurisdiction and written into the scope.
01

Mechanical plans, schedules, or equipment information if available

02

Existing unit data, controls, and known performance issues

03

Roof, exterior, ceiling, or equipment-room access constraints

04

Photos, budget range, preferred timing, and turnover date

Commercial-first project fit

Built for planned replacements and substantial upgrades.

Commercial + multifamily priority

Commercial HVAC work is planned around operations, lifting, access, shutdowns, controls, power, drainage, inspections, and startup.

Qualified residential

Residential HVAC focuses on planned whole-system replacement and substantial upgrades—not emergency dispatch or minor component repair.

One accountable process

From first scope to useful closeout.

01

Send the property + scope

Share the ZIP, building type, requested trades, timing, budget, and the documents you already have.

02

Verify fit + conditions

We review the available information, confirm access, and identify the site conditions that require a visit.

03

Approve a written scope

Inclusions, assumptions, exclusions, schedule, payment steps, and responsibilities are put in writing.

04

Build + close out

One project lead coordinates progress, written changes, punch, photos, warranties, and useful records.

Scope questions

Permit and trade clarity first.

Do you handle both commercial and residential HVAC?+

Yes. Vulcan scopes commercial, multifamily, and residential full-system replacements and substantial HVAC upgrades.

Who handles HVAC permits and licensed trade work?+

Mechanical work is performed or managed by appropriately licensed contractors. Vulcan confirms permit and inspection requirements and identifies responsibilities before work begins.

Can HVAC be coordinated with roofing and electrical?+

Yes. Equipment, curbs, penetrations, flashing, lifting, power, controls, and drainage can be managed as one integrated scope.

$15k minimum · Greater St Louis

Have a real HVAC project to scope?