Berkeley, CA
Religious Institution Mechanical Upgrade | Berkeley
- Commercial
- Institutional
- Berkeley
- Existing Building Upgrade
Commercial and Residential Mechanical Design-Build for the Bay Area
Design-led and detail-driven. We plan complex mechanical systems in full before installation begins.
Residential Services
Heat Pump Installation & All-Electric Conversions Bay Area heat pump installation, furnace-to-heat-pump conversions, and gas-to-electric upgrades — ducted, ductless, and full-system projects sized with Manual J-informed design. Full-System HVAC Replacement Complete residential HVAC replacement when sizing, ductwork, comfort correction, zoning, or electrification matter — not emergency or same-size equipment swaps. HVAC for Remodels Residential HVAC planning and installation for Bay Area remodels — heat pumps, ductwork, equipment placement, Manual J/S/D, and coordination with your builder or architect. HVAC for New Construction HVAC planning for new homes and custom residential projects — Manual J/S/D support, equipment selection, duct design, heat pump systems, and builder or architect coordination before rough-in is locked in. ADU HVAC HVAC for ADUs, garage conversions, and additions where comfort, code, equipment placement, and space constraints matter — often compact heat pump or ductless solutions. Manual J / S / D Load Calculations In-house Manual J, Manual S, and Manual D support so equipment sizing, system selection, and duct design are based on the actual home — not guesswork.
Mechanical Services
Commercial HVAC Design-Build Commercial mechanical scopes for tenant improvements, existing-building upgrades, institutional facilities, and new construction — coordinated with the GC, design team, and project schedule. VRF & Multi-Zone Systems Complex commercial and residential VRF systems planned around zoning, equipment placement, refrigerant routing, access, startup, and long-term serviceability. Controls-Ready Mechanical Mechanical systems prepared for BAS or controls integration through BACnet-capable equipment coordination and communication-ready infrastructure. 3rdGen does not perform BAS programming. High-End Residential HVAC Full-system retrofits, remodels, new construction, heat pump conversions, and design-build HVAC for homes where comfort, layout, and finish details matter. Multifamily HVAC Repeatable HVAC systems for multifamily and mixed-use projects, coordinated around unit layouts, ventilation needs, equipment access, and construction sequencing.
Load Calculations & Design Input In-house Manual J, Manual S, and Manual D support for residential scopes, with practical design input before equipment and duct decisions are locked in.
Principal-Led Work
The Same People Responsible for Scope Decisions Stay Close Through Installation.
3rdGen is a lean, principal-led mechanical design-build firm. That structure matters on complex projects, where early decisions around routing, equipment placement, access, documentation, and coordination can create field problems later if missed.
- Lean team, direct accountability
- Scope decisions connected to field execution
- Built for GC, architect, and engineer coordination
We are built for project teams that need a mechanical partner who can think through the scope, coordinate with the right people, and execute without turning the work into a management burden.
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01 Scope
Decisions made early stay accountable through install.
Routing, equipment placement, access, documentation, and coordination risks are reviewed before pricing and field work lock in preventable problems.
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02 Coordination
The right people stay aligned before installation starts.
We work with the GC, architect, engineer, and owner to reduce clashes, RFIs, and coordination gaps that show up on complex mechanical scopes.
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03 Field
The same leadership stays close through execution.
Principal-led structure keeps scope intent connected to sequencing, workmanship, startup, and closeout — not handed off to layers of management.
11 Years Bay Area Design-Build C-20 HVAC · C-36 Plumbing CA Lic. 1086898 Lean Principal-Led Team
11 Years Bay Area Design-BuildC-20 HVAC · C-36 PlumbingCA Lic. 1086898Lean Principal-Led Team
Project Proof
Selected Work
View all work → 
Berkeley, CA
Hearst Remodel — Berkeley
- High-End Residential HVAC
- Residential Remodel HVAC
- Ductless Multi-Zone Systems
- Heat Pump Systems
Berkeley, CA
San Pablo Ave Retail TI — Berkeley
- Commercial HVAC
- Commercial Tenant Improvement
- Berkeley Commercial HVAC
- Mitsubishi Multi-Zone System
Process
How We Work
A principal-led commercial mechanical process built around clear scope, early coordination, and reliable field execution.
- Drawings reviewed early
- Coordination before install
- Startup + closeout support
Built to reduce field conflicts, schedule delays, and preventable rework before installation starts.
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01 Scope Review
We review drawings, site conditions, schedule, specifications, and mechanical intent before moving into pricing or equipment planning.
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02 Design Input
We help clarify HVAC system approach, load requirements, equipment placement, routing, access, and coordination risks early.
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03 Coordination
We coordinate with the GC, architect, engineer, owner, and other trades to reduce clashes, RFIs, and preventable field issues.
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04 Installation
Our team executes the mechanical scope with attention to sequencing, workmanship, startup, testing, and closeout.
Field Notes & Mechanical Insights
What we're learning in the field.
Practical notes on commercial coordination, VRF systems, load calculations, controls-ready infrastructure, and design-build HVAC decisions that affect real Bay Area projects.
