Can you install a heat pump in an older San Francisco home?
Yes. The bigger question is usually how to integrate distribution, indoor equipment, outdoor equipment, electrical requirements, and routing into the existing building.
RESIDENTIAL HVAC · SAN FRANCISCO, CA
Residential HVAC & Heat Pumps in San Francisco, CA
Heat pump and residential HVAC systems for San Francisco remodels, retrofits, and substantial mechanical upgrades — designed around older buildings, tight equipment locations, limited duct paths, architecture, and the realities of working in the city.
Remodels · Retrofits · Heat Pumps · Multi-Zone Systems
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- 5.0 Google Rating 5.0 out of 5 stars
- Mitsubishi Electric Diamond Contractor
- C-20 + C-36 Licensed & Bonded
- Serving the Bay Area since 2015
Project fit
Residential HVAC projects we handle in San Francisco
Whole-home heat pump retrofits, remodel mechanical scopes, ducted and concealed systems, multi-zone HVAC, ventilation, and substantial residential projects where modern mechanical equipment needs to fit carefully into an existing building.
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New system
Heat Pump Installation
New ducted or ductless heat pump systems sized for your home, comfort goals, and how the house is built.
Heat pump installation -
Full upgrade
Heat Pump Replacement & Conversion
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 & conversion -
Central
Ducted Heat Pump Systems
Central heating and cooling through existing or updated ductwork, with loads and airflow checked before equipment is selected.
Ducted heat pumps -
Room-by-room
Ductless & Multi-Zone Heat Pumps
Mini-splits and multi-zone layouts when zoning, architecture, or tight routing make ductless or mixed systems the better fit.
Ductless & multi-zone -
Coordinated
HVAC for Remodels & Additions
Mechanical design and rough-in coordinated with your architect or builder while walls and ceilings are still open.
HVAC for remodels -
Fresh air
Ventilation & Indoor Air Quality
ERV/HRV, filtration, and balanced ventilation coordinated with your heating and cooling scope when the project needs it.
Ventilation & IAQ
RELEVANT SAN FRANCISCO WORK
Whole-home heat pump remodel
View project →
High-end residential remodel
Hearst Remodel
A representative San Francisco or urban Bay Area project showing the equipment planning, routing, coordination, and field execution required when modern HVAC has to fit into an existing building.
- Home type
- Existing 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 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 BUILDING
San Francisco heat-pump retrofits are often an integration problem before they are an equipment problem
Much of San Francisco's housing predates modern residential HVAC. Existing buildings can offer limited duct space, tight rear yards, constrained roofs, stacked floor plans, finish-sensitive interiors, and few obvious places for mechanical equipment.
3rdGen evaluates load, zoning, distribution, indoor and outdoor equipment locations, duct or refrigerant routes, ventilation, access, sound, and serviceability before deciding which system architecture makes sense for the building.
San Francisco's adopted Housing Element specifically notes that most of the city's housing was built before the middle of the twentieth century.
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Older buildings
Existing framing, narrow cavities, previous remodels, and limited mechanical space can make conventional ducted retrofits impractical without careful planning.
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Ducted, concealed & ductless
The right solution might be central ducted equipment, concealed fan coils, ductless units, or a combination depending on the building.
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Outdoor equipment placement
Rear yards, roofs, light wells, neighboring buildings, visibility, sound, and service access can all influence where equipment belongs.
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Remodel coordination
When walls and ceilings are already open, early mechanical input can create options that may disappear once finishes are installed.
San Francisco treats heat pumps as permitted mechanical work. Depending on the project, mechanical, electrical, and building permits can all be involved, and the City currently handles many heat-pump installations through online trade-permit processes.
Homeowner reviews
Trusted by Bay Area Homeowners
5.0
5 out of 5 stars from 207 Google 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
Heat pump work, start to finish
On many San Francisco projects, the important decisions happen around the home, the existing system, and the distribution — not from copying the equipment that came out.
01 — Project review
Plans, goals, existing system, remodeling scope, and known constraints.
02 — Load & system design
Manual J / system sizing where appropriate, zoning strategy, equipment selection, and distribution.
03 — Equipment & routing
Indoor equipment, outdoor equipment, duct / refrigerant routing, ventilation, access, and serviceability.
04 — Permit / coordination review
Equipment locations, GC/architect coordination, and permit requirements where they apply.
05 — Installation
Rough-in and finish installation coordinated around the project.
06 — Startup & closeout
Startup, controls, commissioning checks, inspection coordination, and homeowner handoff.
Complete project delivery
The whole heat-pump project—not just the outdoor unit
A San Francisco 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 project-
Existing equipment and gas heat
Removal and replacement planned around the complete conversion.
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Ducts, zoning, and controls
Reused, modified, or replaced according to what the design requires.
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Electrical and permitting
Capacity, circuits, documentation, inspections, and other trades coordinated with the HVAC scope.
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Startup and commissioning
Operation and airflow checked before the project is handed back to you.
Cost
What a San Francisco heat-pump project costs — and what moves the number
In San Francisco, installation conditions can move the project as much as the equipment selection. Limited access, long refrigerant routes, concealed equipment, new ductwork, electrical scope, roof or rear-yard equipment, multi-story distribution, ventilation, and finish protection all affect the work required.
Scope Typical 3rdGen Project Range What drives it
Ducted heat pump, existing ducts usable $20k–$30k Equipment tier, capacity, controls, condenser location and access
Ducted heat pump + duct repair or resizing $25k–$45k Amount of ductwork replaced, crawlspace or attic access, return-air changes
Ductless multi-zone, 3–4 heads $25k–$40k Head type, line-set length, routing, concealment and finish conditions
Whole-home ducted + ductless combination $40k–$80k+ Multiple systems, zoning, ductwork, filtration, ventilation and architectural coordination
New construction system $20k–$50k+ Building size, system count, Title 24/design requirements and coordination with the build
ADU system $8k–$15k Zone count, head type, line-set routing, and whether the ADU shares the main house or stands alone
Electrical panel upgrade, when required $8k–$10k+ Service size, meter location, utility requirements and site conditions
Complex whole-home and design-build projects can exceed these ranges. Rebates and incentives may reduce your net project cost.
Project inquiry
Tell us about your San Francisco HVAC project
Planning a heat-pump retrofit, residential remodel, concealed system, or substantial HVAC replacement? Send us the project context, existing system, timeline, and plans if available.
- Reviewed by a project lead, not a dispatcher
- We tell you if your scope is not a fit for us
- No high-pressure in-home sales appointment
Project Inquiry
Inquiry Sent
Thanks — your project details are on their way to 3rdGen. We’ll review them and follow up about the next step.
Project teams
We work with the people designing and building your home
San Francisco remodels reward early coordination. HVAC can compete with structure, stairs, ceilings, lighting, cabinetry, plumbing, and architecture for limited space, so equipment and routing decisions are easier to solve before construction closes those options off.
We work within existing project teams in San Francisco and across the city — or directly with homeowners when that is the right path.
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Architects
Mechanical systems coordinated around architecture, ceiling conditions, equipment locations, routing, and finish requirements.
Explore HVAC for architects -
General Contractors & Builders
Clear scope, scheduling, rough-in coordination, submittals, inspections, startup, and project handoff.
Explore HVAC for builders & GCs -
Mechanical Engineers
Field execution, equipment selection, controls coordination, submittals, installation, and commissioning aligned with the mechanical design.
Explore engineering coordination -
Homeowners
Already assembling your own project team? We can take ownership of the mechanical scope and coordinate directly with the other professionals involved.
Start a residential project
Mitsubishi Electric
Proud Mitsubishi Electric Diamond Contractor
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
12-year warranty
Extended parts & compressor coverage on qualifying Diamond installations.
Factory-trained crews
Ongoing manufacturer training on the latest hyper-heat systems.
Priority support
Direct factory escalation if anything ever needs attention.
FAQ
Common Questions
Straight answers on heat pumps, retrofits, and project scope in San Francisco.
What if there is no room for conventional ductwork?
A ductless, concealed, small-duct, or mixed system may be worth evaluating depending on the architecture and loads.
Where can the outdoor heat-pump unit go?
That depends on the property. Roofs, rear yards, side conditions, sound, access, neighboring buildings, structural support, and visual impact may all affect placement.
Can you coordinate with our architect and GC during a remodel?
Yes. San Francisco remodels are exactly the kind of work where early mechanical coordination can prevent difficult compromises later.
Do heat pumps require permits in San Francisco?
Yes. Heat-pump work falls under the City's mechanical permitting system, and other trade or building permits can apply depending on the complete project scope.
Project Inquiry
Inquiry Sent
Thanks — your project details are on their way to 3rdGen. We’ll review them and follow up about the next step.