Built for Project Teams
Working With
Engineers
For mechanical engineers and consultants who need field execution aligned with the engineered drawings, documentation, equipment schedules, and system requirements — across Bay Area commercial, institutional, and VRF projects.
Built for Engineers
A Mechanical Contractor That Builds the Drawings
On engineered projects, the work an engineer puts into a set of drawings only matters if it survives the field. Equipment gets swapped, dimensions get fudged, controls boundaries blur. 3rdGen is structured for scopes where the engineered design needs to be carried into installation, documented, and commissioned to match.
- Engineer-led commercial projects
- Institutional and educational facilities
- Adaptive reuse and retrofits
- VRF and multi-zone systems
- Multifamily and mixed-use construction
- Custom residential with engineered drawings
- Net-zero and all-electric projects
- Owner-led capital projects
- Public agency and code-driven scopes
What We Bring
Field Execution Engineered to the Drawings
From submittals through commissioning, the engineered design stays the source of truth — specs honored, substitutions vetted, and closeout documentation matched to the basis of design.
Specification Adherence
Installation matches the engineered drawings, equipment schedules, and basis of design. Substitutions are vetted, documented, and routed for approval — not improvised in the field.
Drawing Interpretation
Constructability review, dimension verification, and clearance checks performed before equipment is ordered so field conditions match the engineered intent.
Submittals & Shop Drawings
Clean submittal packages, shop drawings, equipment cut sheets, and product data delivered in the format your review cycle expects — minimal back-and-forth.
Startup, TAB & Commissioning
Startup procedures, test-adjust-balance reports, commissioning support, and closeout documentation aligned with the engineer’s basis of design and owner’s project requirements.
Integration
How We Work With the Engineer of Record
Engineers need a contractor that respects the documentation, communicates in technical language, and treats RFIs and substitutions as engineered decisions — not field shortcuts.
Construction Administration
Present through CA phase — submittal reviews, RFIs, field observations, and punch handled with the engineer’s documentation as the source of truth.
RFI & Substitution Discipline
Structured RFI responses, substitution requests, and value-engineering proposals routed cleanly with full technical backup — engineered decisions stay engineered.
Documentation to Closeout
As-built drawings, equipment data, O&M manuals, TAB reports, and commissioning records compiled into a closeout package that matches the engineered scope.
Coordination
What We Coordinate For
Engineered mechanical scopes touch loads, equipment selection, ductwork sizing, controls, acoustics, code, and commissioning. Our role is to keep all of it tied to the drawings — installed, documented, and verified.
- Design intent vs. field conditions
- Equipment schedule verification
- Dimension and clearance checks
- Manual J load and selection verification
- Refrigerant pipe sizing and routing
- Ductwork sizing and air distribution
- BACnet and controls interface boundaries
- Acoustic and vibration performance
- Title 24, CalGreen, and ventilation compliance
- TAB, commissioning, and performance testing
Scope
Project and System Types
The engineered scopes 3rdGen is built for, and the mechanical systems we install, balance, and commission across the Bay Area.
Project types
- Engineered commercial new construction
- Tenant improvement and existing-building retrofits
- Institutional and educational facilities
- Religious and community facilities
- Multifamily and mixed-use buildings
- Custom residential with mechanical drawings
- Adaptive reuse projects
- Net-zero and all-electric scopes
- Public agency and code-driven projects
System types
- Engineered VRF and multi-zone systems
- Heat pump and electrification systems
- Packaged rooftop and split systems
- Concealed ducted heat pump systems
- Controls-ready mechanical infrastructure
- Energy recovery ventilation (ERV)
- Code-compliant mechanical ventilation
- Custom ducted air distribution
- Hydronic system coordination
Accountability
Drawings Run All the Way to Closeout
The work an engineer puts into a set of drawings only matters if it survives the field. Equipment gets swapped, dimensions get fudged, controls boundaries blur — and the as-built barely resembles the design.
3rdGen stays close to the engineered drawings from submittal through commissioning. Substitutions are vetted with documentation, RFIs are written cleanly, and the closeout package matches the basis of design — not a field improvisation.
Selected Work
Relevant Work
Recent Bay Area projects where engineered drawings, equipment selection, and field execution had to stay aligned through commissioning.
-
Berkeley, CA · Institutional Upgrade
Religious Institution Mechanical Upgrade | Berkeley
Commercial HVAC upgrade for an institutional religious facility in Berkeley, delivered in coordination with VRGC Inc. and the project team around existing building conditions, access limitations, and closeout requirements.
-
Berkeley, CA · Commercial Tenant Improvement
San Pablo Ave Retail TI — Berkeley
GC-led Berkeley retail tenant improvement with a Mitsubishi four-zone ductless system, fresh air supply, exhaust ventilation, and louver coordination in an active commercial space.