Residential HVAC · Sausalito, CA
Whole-home heat pump systems for Sausalito remodels, retrofits, and substantial HVAC replacements — with mechanical planning around existing homes, hillside access, equipment placement, architecture, and long-term serviceability.
Remodels · Retrofits · Heat Pumps · Multi-Zone Systems
Project Inquiry
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Project fit
Whole-home heat pump retrofits, remodel mechanical scopes, ducted and multi-zone systems, ventilation, and residential projects where equipment placement and routing need to be considered as part of the house — not after the fact.
New system
New ducted or ductless heat pump systems sized for your home, comfort goals, and how the house is built.
Heat pump installationFull upgrade
Replace aging furnace and AC together, or convert gas heat to a heat pump with ducts, electrical scope, and controls planned as one job.
Replacement & conversionCentral
Central heating and cooling through existing or updated ductwork, with loads and airflow checked before equipment is selected.
Ducted heat pumpsRoom-by-room
Mini-splits and multi-zone layouts when zoning, architecture, or tight routing make ductless or mixed systems the better fit.
Ductless & multi-zoneCoordinated
Mechanical design and rough-in coordinated with your architect or builder while walls and ceilings are still open.
HVAC for remodelsFresh air
ERV/HRV, filtration, and balanced ventilation coordinated with your heating and cooling scope when the project needs it.
Ventilation & IAQRelevant Marin work
High-end residential remodel
A representative Marin or Bay Area project showing the equipment planning, routing, coordination, and field execution we bring to design-sensitive Sausalito residential work.
The six-zone Fujitsu ductless system was installed, permitted, inspected, and completed as part of the home’s remodel-for-sale scope — delivering zoned heating and cooling without a conventional ducted retrofit.
Representative published remodel scope — location, photos, and full details on the project page.
View projectBuilt around the house
Sausalito homes can combine sloped sites, limited exterior space, existing construction, and architecture where mechanical equipment cannot simply be placed wherever installation is easiest. Outdoor-unit location, refrigerant and duct routes, service access, noise, and visible mechanical elements all deserve attention early.
3rdGen evaluates the heating and cooling loads together with distribution, equipment locations, access, zoning, ventilation, and routing so the finished system works with the property rather than becoming an afterthought.
Sausalito's planning process places substantial emphasis on architectural compatibility, and the City states that planning permits are required for almost all changes to residential buildings. Its current housing planning also specifically prioritizes preservation of the historic district.
Slopes, stairs, tight exterior areas, and limited access can influence equipment locations, routing, staging, and the practical installation strategy.
Heat-pump placement should consider service access, sound, appearance, clearances, and how the equipment relates to neighboring properties and the home itself.
Existing framing, ductwork, mechanical spaces, and previous remodels can all affect whether a ducted, concealed, or multi-zone approach makes the most sense.
When the home is already being redesigned, early HVAC input can protect ceilings, finishes, equipment access, and mechanical routes before construction is committed.
Homeowner reviews
207 Google reviews
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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.
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Devin is meticulous, methodical, and knowledgeable. Professional crew and a heat pump install we trust completely.
Photos from the installs above
Read all 207 reviewsHow we work
On many Sausalito projects, the important decisions happen around the home, the existing system, and the distribution — not from copying the equipment that came out.
Plans, goals, existing system, remodeling scope, and known constraints.
Manual J / system sizing where appropriate, zoning strategy, equipment selection, and distribution.
Indoor equipment, outdoor equipment, duct / refrigerant routing, ventilation, access, and serviceability.
Equipment locations, GC/architect coordination, and permit requirements where they apply.
Rough-in and finish installation coordinated around the project.
Startup, controls, commissioning checks, inspection coordination, and homeowner handoff.
Complete project delivery
A Berkeley electrification project can touch the furnace, ducts, electrical service, controls, equipment locations, permits, and finished interiors. We plan those connections as one scope.
The result is a complete system designed for the home, installed to the plan, and tested before handoff.
Tell us about the projectRemoval and replacement planned around the complete conversion.
Reused, modified, or replaced according to what the design requires.
Capacity, circuits, documentation, inspections, and other trades coordinated with the HVAC scope.
Operation and airflow checked before the project is handed back to you.
Cost
On a Sausalito project, the equipment itself may only be part of the scope. Site access, existing construction, ductwork, number of zones, equipment siting, routing, electrical requirements, ventilation, and remodel conditions can materially change the work required to integrate the system cleanly.
Complex whole-home and design-build projects can exceed these ranges. Rebates and incentives may reduce your net project cost.
Project inquiry
Planning a whole-home heat pump, remodel, major HVAC replacement, or multi-zone system? Send us the home, project goals, timeline, and plans if they are available.
Project Inquiry
Thanks — your project details are on their way to 3rdGen. We’ll review them and follow up about the next step.
Project teams
On Sausalito remodels, mechanical decisions can intersect with architecture, exterior appearance, structural conditions, access, and builder sequencing. Working through those decisions early gives the HVAC system a better chance of fitting the project cleanly.
We work within existing project teams in Sausalito and across Marin — or directly with homeowners when that is the right path.
Mechanical systems coordinated around architecture, ceiling conditions, equipment locations, routing, and finish requirements.
Explore HVAC for architectsClear scope, scheduling, rough-in coordination, submittals, inspections, startup, and project handoff.
Explore HVAC for builders & GCsField execution, equipment selection, controls coordination, submittals, installation, and commissioning aligned with the mechanical design.
Explore engineering coordinationAlready assembling your own project team? We can take ownership of the mechanical scope and coordinate directly with the other professionals involved.
Start a residential projectMitsubishi Electric
As a Mitsubishi Electric Diamond Contractor, we design and install ducted, ductless, and multi-zone systems for Bay Area homes, with factory-trained crews and longer warranty options on qualifying residential installs.
Mitsubishi is not automatically the answer to every home. We start with what the project requires and recommend the system that makes sense.
12 Year Parts &
Compressor Warranty
Extended parts & compressor coverage on qualifying Diamond installations.
Ongoing manufacturer training on the latest hyper-heat systems.
Direct factory escalation if anything ever needs attention.
FAQ
Straight answers on heat pumps, remodels, and design-sensitive HVAC scope in Sausalito.
Yes. Hillside conditions do not prevent a heat-pump installation, but access, outdoor-unit location, refrigerant routing, drainage, serviceability, and the existing home should be evaluated before the system is finalized.
Often. Outdoor-unit placement, concealed indoor equipment, ducted systems, and careful routing can all help reduce the visual impact of the mechanical system.
Sometimes. We evaluate the existing ducts for sizing, condition, leakage, airflow, return-air capacity, and compatibility with the new equipment before recommending reuse.
Mechanical work generally requires the appropriate City review and permitting. Sausalito also notes that planning review applies broadly to changes to residential buildings, so the exact approval path depends on the scope and property.
Yes. Architect- and builder-led residential work is a strong fit for 3rdGen, particularly where HVAC decisions affect architecture, ceilings, equipment locations, or construction sequencing.
Project Inquiry
Thanks — your project details are on their way to 3rdGen. We’ll review them and follow up about the next step.
