For Mechanical Engineers
The Engineered Design
Shouldn't Stop at Submittal.
3RDGEN executes engineer-led mechanical projects from submittals and field coordination through installation, startup, TAB, commissioning, and closeout—without losing the intent of the engineered documents.
- Commercial
- Institutional
- VRF / Multi-Zone
- Multifamily
- Engineered Residential
The Standard
A Good Mechanical Contractor Shouldn't Drift from the Drawings.
Specification Adherence
Equipment, controls, accessories, performance requirements, and installation details are reviewed against the issued documents before procurement and installation.
Drawing Interpretation
We work from the mechanical drawings, schedules, details, specifications, and applicable RFIs—not assumptions made in the field.
Submittals & Shop Drawings
Equipment selections, technical data, substitutions, and coordination drawings are documented and routed for review before installation.
Startup, TAB & Commissioning
Startup, controls verification, TAB coordination, deficiencies, and commissioning requirements are carried through closeout.
Project Fit
Where We Fit on Engineer-Led Work
We support mechanical engineers during bidding, construction, and closeout by turning engineered documents into coordinated field execution. Our role is to identify conflicts early, document changes correctly, install to the approved design, and close the loop through startup and commissioning.
- Constructability Review
- Equipment + Controls Coordination
- Submittal Preparation
- Shop / Coordination Drawings
- RFIs + Field Clarifications
- Approved Substitutions
- Installation to Contract Documents
- TAB Coordination
- Startup + Commissioning
- Punch List + Closeout
Selected Work
Relevant Work
Selected residential and commercial projects where engineered drawings, equipment selection, and field execution had to stay aligned through commissioning.
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Custom Residence — Berkeley
Fujitsu multi-zone ductless heat pump
Field coordination · installation · startup · closeout
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Institutional — Berkeley
Commercial split system + ventilation
GC coordination · installation · startup · commissioning support
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Commercial TI — Bay Area
Tenant improvement HVAC + equipment coordination
Submittals · RFIs · field coordination · installation
Integration
How We Work With the Engineer of Record
Engineer-led construction works when the documentation chain remains intact. We route technical questions, proposed substitutions, coordination issues, and field conditions through the appropriate review process rather than resolving design questions informally in the field.
Construction Administration
Present through CA — 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 VE proposals routed cleanly with technical backup — engineered decisions stay engineered.
Documented Coordination
As-builts, equipment data, O&M manuals, TAB records, and commissioning documents compiled into a closeout package that matches the scope.
Coordination
What We Coordinate
Mechanical scope crosses structural, architectural, electrical, plumbing, and life-safety boundaries. We coordinate these interfaces against the issued documents before they become field conflicts.
- Structural penetrations
- Architectural clearances
- Ceiling / soffit conditions
- Electrical requirements
- Controls interfaces
- Plumbing / condensate
- Equipment access
- Service clearances
- Roof penetrations
- Fire / smoke interfaces
- TAB requirements
- Other trade conflicts
Scope
Mechanical Scope We Can Carry
HVAC, ventilation, controls, and related mechanical systems we can carry from coordination through startup, TAB, and closeout on engineer-led commercial, institutional, multifamily, and custom residential work.
- VRF / heat recovery
- Ducted heat pumps
- Split systems
- Packaged equipment
- Ventilation / exhaust
- ERV / HRV
- DOAS
- Hydronic interfaces
- Controls
- Refrigerant piping
- Sheet metal / ductwork
- Equipment replacement
- Startup
- Commissioning support
Accountability
One Team Through Closeout
Our responsibility doesn’t stop when the equipment turns on. We stay involved through startup, controls verification, TAB coordination, deficiency correction, punch-list completion, and required closeout documentation so the installed system can be reviewed against the engineered intent.
Where applicable: startup reports · TAB · commissioning · as-builts · O&M documentation · punch list
Project Inquiry
Inquiry Sent
Thanks — your project details are on their way to 3rdGen. We’ll review them and follow up about the next step.