[ 01 ] Residential HVAC · San Ramon, CA

Residential HVAC in San Ramon, CA

Dougherty Valley and Gale Ranch homes often need zoned heat pumps and duct corrections when builder-grade HVAC cannot balance two-story comfort.

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Project photo

[ img ] San Ramon · residential design-build

2015

In business since

J · S · D

In-house Manual calcs

C-20 · C-36

CA Lic. 1086898

Local context

Heating & cooling designed for San Ramon

San Ramon has many newer suburban homes, large two-story homes, planned communities, and some custom hillside properties. Comfort issues often involve upstairs heat, single-zone systems, builder-grade equipment, and high cooling demand.

Areas we often work in: Dougherty Valley · Gale Ranch · Windemere · Twin Creeks · Bollinger Hills · Norris Canyon Estates

Contra Costa County · permits pulled as part of full-system design-build scopes

Climate

Inland valley heat

San Ramon gets hot inland summers, so cooling performance matters. Zoned HVAC, heat pumps, duct sealing, high-efficiency cooling, attic heat, and filtration for smoke and dust are common drivers.

Capabilities

Full-system HVAC for San Ramon homes

Remodels, whole-home replacements, heat pump conversions, and multi-zone comfort — planned with Manual J, S, and D where the project needs it.

Heat pump conversions

Gas-to-electric and high-efficiency heat pump upgrades sized for your home, with distribution and electrical needs planned up front.

Whole-home HVAC replacement

Full-system retrofits when ducts, equipment, zoning, or efficiency need a real redesign — not a same-size swap.

Ductless & multi-zone

Room-by-room comfort with ductless or ducted multi-zone layouts where the home needs flexible zoning.

Zoned comfort & VRF

Multi-zone ducted and ductless layouts, including VRF where larger or multi-level homes need quiet, flexible zoning.

Duct design & Manual D

Manual D–informed duct layouts so rooms get the airflow the load calculation calls for.

Indoor air quality & filtration

Upgraded filtration, sealed returns, and distribution strategies that help during wildfire smoke and allergy seasons.

Process

From first call to startup in San Ramon

01

Tell us about your home

Share location, timeline, plans if you have them, and what is not working today — or what your builder has scoped.

02

Size & design the system

We use Manual J, S, and D where the project needs it to match equipment, ducts, and zoning to the actual house.

03

Coordinate & install

Principal-led field work with your GC or architect around access, finishes, sequencing, and clean rough-in.

04

Startup & handoff

System startup, basic orientation, and documentation so you know how the new system is meant to run.

Why 3rdGen

Built for whole-home projects in San Ramon

Principal-led installs

Field work led by principals who understand the scope before equipment is ordered.

In-house Manual J · S · D

Load, equipment, and duct decisions based on the home — not square-footage rules of thumb.

Licensed design-build

C-20 HVAC and C-36 Plumbing · CA Lic. 1086898 · in business since 2015.

FAQ

Frequently asked in San Ramon

Why is my upstairs so hot in San Ramon?

Two-story layouts, attic heat, duct imbalance, and single thermostats are common causes.

Are heat pumps good for San Ramon homes?

Yes, especially newer homes with better insulation, but the system must be sized for summer cooling.

Can you upgrade a builder-installed HVAC system?

Yes. Many San Ramon homes benefit from better equipment, zoning, duct sealing, or airflow balancing on a full replacement scope.

Do larger homes need more than one system?

Sometimes. Larger homes may need zoning, multiple systems, or duct redesign to stay comfortable.

Can filtration help during wildfire smoke days?

Yes. A properly selected filter and sealed duct system can help reduce indoor smoke particles.

Service area

Residential HVAC nearby

We serve homeowners and residential builders across the East Bay, San Francisco, and Tri-Valley on full-system design-build projects.

All residential HVAC services →