Residential HVAC · Berkeley, CA
Residential HVAC in Berkeley, CA
Heat pumps, electrification, remodels, additions, ADUs, whole-home HVAC, and new construction — planned with homeowners, architects, and residential GCs who need mechanical work that fits how Berkeley projects actually get built.
Berkeley · residential design-build
- 5.0 Google Rating 5.0 out of 5 stars
- Based in Berkeley
- 11 Years Bay Area Design-Build
- Mitsubishi Diamond Contractor
- Manual J / S / D
- CA Lic. 1086898
Home market
Berkeley is home.
3rdGen Heating & Cooling is based in Berkeley. We work directly with homeowners, architects, residential general contractors, builders, and project teams on serious residential HVAC scopes.
Berkeley residential HVAC is rarely just an equipment swap. Older homes, remodeling constraints, limited mechanical space, additions, ADUs, electrification, electrical coordination, architectural constraints, permitting, and inspection sequencing all shape what will actually work.
We don’t merely “serve Berkeley.” We work here, understand the housing and construction environment here, and know how residential projects move from design through permitting, installation, inspection, startup, and commissioning.
Neighborhoods we often work in: North Berkeley · Elmwood · Claremont · Berkeley Hills · West Berkeley · Thousand Oaks
- Older Craftsman and bungalow stock
- Hillside and fog-influenced microclimates
- Remodels and additions with tight chases
- ADUs needing independent mechanical scopes
- Electrification and heat pump conversions
- Architect- and GC-led project teams
Electrification
Berkeley pushed electrification forward.
That local environment has made heat pumps, all-electric systems, ADUs, renovations, and thoughtful mechanical planning especially relevant for homeowners and project teams here.
3rdGen is a Berkeley-based contractor working inside that transition — designing systems around the actual building rather than simply swapping equipment.
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Replace gas heating with heat pumps
Furnace-to-heat-pump conversions planned with load, distribution, and electrical needs in mind.
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Add cooling while electrifying
Quiet heating and cooling in homes that never had central AC — without forcing a one-size ducted retrofit.
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Plan electrical and mechanical together
Panel capacity, outdoor unit placement, and line-set routing coordinated before construction creates conflicts.
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Modernize older homes carefully
Equipment, registers, and routing planned around architecture — not against it.
Project types
Built for whole-home projects
Heat pump conversions, whole-home replacements, multi-zone comfort, remodels, ADUs, and new construction — planned with Manual J, S, and D where the project needs it.
ADU HVAC
ADUs are a real project category here.
Whether you are a homeowner building an ADU, an architect designing one, or a GC constructing one, 3rdGen can help determine what mechanical approach actually fits — including coordination with the main house when both scopes connect.
System approaches
No single system fits every ADU. We help determine what fits the envelope, site, and project team.
- Compact ducted heat pumps
- Ductless systems
- Multi-zone layouts
- Independent systems where appropriate
Design-build
Designed before it’s installed
Berkeley projects reward early mechanical decisions. We size, select, and plan distribution so the system fits the building — then install, start up, and commission as the same team.
Manual J
Room-by-room loads so equipment matches how the home actually gains and loses heat.
Manual S
Equipment selected to the calculated load — not the nameplate on whatever came out.
Manual D
Duct and airflow planning when distribution is part of making comfort work.
Real Berkeley projects
Berkeley whole-home heat pump remodel
View Project → 
Berkeley, CA · High-end residential remodel
Hearst Remodel — Berkeley
GC-led residential remodel with a six-zone Fujitsu ductless heat pump system and two outdoor units, coordinated around an older existing home being prepared for sale.
- Home type
- Older Berkeley-style home, remodel for sale
- System
- Fujitsu multi-zone ductless heat pump
- Mechanical scope
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- · Six indoor wall units
- · Two outdoor units
- · Wall-mounted outdoor brackets
- · Refrigerant routing and field coordination
Challenge
- Existing older home with limited equipment placement options
- Outdoor units required side-yard wall bracket mounting
- Finish-sensitive interior installation
- Coordination with the general contractor’s remodel schedule
3RDGEN scope
- Six-zone ductless heat pump installation
- GC-led remodel coordination
- Permit and inspection support
- Startup as part of the completed remodel scope
Outcome
The six-zone Fujitsu ductless system was installed, permitted, inspected, and completed in June 2023 as part of the home’s remodel-for-sale scope — delivering zoned heating and cooling without a conventional ducted retrofit.
Homeowner reviews
Trusted on serious residential installs
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“Mitsubishi mini-split installed with outstanding care. Indoor and outdoor units done right. High efficiency meant a meaningful federal tax credit too.”
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“Devin and his crew did a fantastic job installing AC for our whole house. High quality Mitsubishi equipment and a clean installation throughout.”
Project teams
Already have an architect or contractor?
Good.
We regularly work within existing project teams and can coordinate the mechanical scope with the architectural, electrical, structural, and construction requirements of the project — or work directly with the homeowner when that is the right path.
- Homeowners
- Architects
- Residential GCs
- Builders
- Other trades
Local process
We know how Berkeley projects move.
Because we work here, Berkeley permitting and inspection requirements are not an afterthought. Familiarity with local documentation, plan requirements, and inspection workflow helps us plan the mechanical scope before construction creates conflicts.
We do not claim preferential access, influence, or special relationships with the City of Berkeley or the Building Department — only experience with how projects here typically proceed.
01
Tell us about the project
Share location, timeline, plans if you have them, and whether you are a homeowner, architect, or GC.
02
Size & design the system
Manual J, S, and D where the project needs it — matching equipment, ducts, and zoning to the actual house.
03
Coordinate, permit & install
Design-build field work sequenced with your team around access, finishes, documentation, and inspections.
04
Startup & commissioning
System startup, basic orientation, and handoff so you know how the new system is meant to run.
Manufacturer credibility
Mitsubishi Electric Diamond Contractor
Elite Diamond status supports design quality, installation standards, and extended warranty pathways on qualifying Mitsubishi systems — useful proof of technical depth on heat pump projects.
Common Questions
Frequently asked about Berkeley projects
Can heat pumps work in older Berkeley homes?
Yes. Older Craftsman homes, bungalows, and hillside properties are common heat pump candidates when sizing, equipment placement, and distribution are planned around the actual structure — ductless, compact ducted, or mixed approaches depending on the home.
Can existing ductwork be reused?
Sometimes. If ducts are leaky, undersized, poorly balanced, or never designed for the new loads, addressing them during replacement often solves comfort problems that equipment alone cannot fix. We evaluate ducts as part of full-system design.
What HVAC options work for a Berkeley ADU?
Compact ducted heat pumps, ductless systems, multi-zone layouts, or independent systems can all fit depending on layout, code, and coordination with the main house. We help determine what actually fits the project — not one prescribed product.
Do you help with electrification and gas-to-electric conversions?
Yes. Furnace-to-heat-pump and all-electric HVAC conversions are core project types, planned with electrical coordination rather than as an afterthought.
Can you work with our architect or general contractor?
Yes. Many Berkeley scopes are architect- or GC-led. We coordinate mechanical design, rough-in, equipment placement, and sequencing with the existing project team — or work directly with homeowners when that is the path.
Do you handle permits and inspections in Berkeley?
Permit and inspection coordination are part of design-build scopes. Local familiarity helps us plan documentation and field sequencing — without implying special treatment or guaranteed approvals.
Whole-home ducted or ductless — which is better?
It depends on existing ducts, zoning goals, architecture, and remodel constraints. We evaluate both and recommend what fits the building and project — not what is easiest to install.
Service area
Residential HVAC nearby
We serve homeowners and residential builders across the Inner East Bay, San Francisco, Lamorinda, Tri-Valley, and surrounding Bay Area communities on full-system design-build projects.