3rdGen Building Systems

High-End Residential HVAC Design-Build

Residential HVAC for Remodels, Retrofits, and New Construction

3rdGen Heating & Cooling supports Bay Area homeowners, residential GCs, and architects on full-system HVAC projects where comfort, equipment placement, duct design, finish details, and long-term performance matter.

Built for Full-System Residential Projects

Residential HVAC should be planned around the home, not forced into it after the design is already set. Remodels, retrofits, and new construction projects all require decisions about load, equipment, ductwork, zoning, access, aesthetics, and comfort.

3rdGen is best suited for full-system residential work where those decisions matter. We are not structured around small service calls, emergency repair, or low-ticket equipment swaps.

Best-fit scopes

  • Full-system HVAC retrofits
  • Major remodels
  • New construction
  • Heat pump conversions
  • VRF and multi-zone systems
  • Projects with a GC or architect involved
  • Homes where comfort and finish details matter
  • Projects requiring Manual J/S/D support

What 3rdGen Supports

3rdGen helps residential project teams make HVAC decisions around the actual home, not generic equipment assumptions.

Load and Design Input

Provide Manual J, Manual S, and Manual D support where appropriate so sizing, equipment selection, and duct design are based on the home.

System Planning

Support equipment placement, duct routing, zoning, heat pump conversions, VRF options, access, and comfort strategy.

Builder and Architect Coordination

Coordinate with residential GCs and architects around framing, ceilings, soffits, access panels, equipment locations, electrical needs, and finish conditions.

Installation and Startup

Execute the residential HVAC scope with attention to workmanship, comfort, serviceability, startup, and long-term performance.

Residential HVAC Coordination Considerations

High-end residential HVAC affects comfort, architecture, finish details, and long-term usability. The right system needs to fit the home and the project team's plan.

  • Manual J load calculations
  • Manual S equipment selection
  • Manual D duct design
  • Equipment placement
  • Duct routing and distribution
  • Zoning strategy
  • Heat pump conversion requirements
  • VRF and multi-zone options
  • Ceiling and soffit conditions
  • Access and serviceability
  • Electrical coordination
  • Finish-detail impact

Residential Project and System Types

Project types

  • High-end residential remodels
  • Full-system retrofits
  • Residential new construction
  • Heat pump conversions
  • Builder-led projects
  • Architect-led projects
  • Larger custom homes
  • Design-sensitive residential scopes

System types

  • Heat pump systems
  • Split systems
  • Ducted systems
  • Ductless systems
  • VRF systems
  • Multi-zone HVAC systems
  • Ductwork and distribution
  • Ventilation and comfort upgrades

Residential HVAC That Respects the Home

The best residential HVAC projects are coordinated before the field has to solve them. Equipment location, routing, duct design, comfort expectations, access, and finish conditions all matter.

3rdGen's residential work is built for homeowners, builders, and architects who want the system planned properly — not just installed quickly.

Planning a Residential HVAC Scope That Needs Design Input?

Send the project location, timeline, plans if available, and a short description of the HVAC scope. If it looks like a fit, we'll follow up to discuss the right next step.

Discuss a Project