[ 01 ] Residential HVAC · Lafayette, CA

Residential HVAC in Lafayette, CA

Lafayette whole-home HVAC projects often combine heat pump upgrades with zoning and duct corrections for multi-level and hillside layouts.

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Project photo

[ img ] Lafayette · 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 Lafayette

Lafayette has larger single-family homes, ranch-style homes, custom homes, and hillside properties. Many homes have central systems, but ductwork and zoning often lag behind the size and layout of the house.

Areas we often work in: Happy Valley · Burton Valley · Reliez Valley · Lafayette Hills · Downtown Lafayette · Acalanes Valley

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

Climate

Inland valley heat

Lafayette gets warm inland summers and cooler winter mornings. Cooling capacity, heat pumps, zoning, duct upgrades, attic heat, and smoke filtration matter. Larger homes often need more than a simple equipment swap.

Capabilities

Full-system HVAC for Lafayette 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 Lafayette

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 Lafayette

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 Lafayette

Why is my Lafayette home hard to cool?

Large square footage, attic heat, older ducts, west-facing windows, and single-zone systems are common causes.

Are heat pumps practical in Lafayette?

Yes. A well-designed heat pump system can handle both heating and cooling for many Lafayette homes when properly sized.

Do hillside homes need special HVAC planning?

Often, yes. Equipment access, routing, drainage, sound, and wildfire-smoke filtration should be considered up front.

Should I add zoning to my HVAC system?

If different parts of the home have different temperatures, zoning may help — especially in larger or multi-level homes.

What filtration should I use during smoke season?

Use the highest-efficiency filter your system can handle without restricting airflow, planned as part of the system design.

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.

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