Residential HVAC · Alameda, CA
Heat pump design and installation for Alameda’s Victorians, bungalows and post-war houses. We size each system with Manual J, plan around plaster and salt air, and handle the permit and Alameda Municipal Power details.
Remodels · Retrofits · Heat Pumps · Multi-Zone Systems
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Alameda scopes
Alameda’s mild weather and older houses lead to a particular set of jobs. Here is what we see and build most.
Historic
Concealed or slim-profile equipment that adds comfort without cutting through original plaster or changing the street-side look.
Heat pump installationConversion
Take out a closet or crawlspace gas furnace and put in a ducted heat pump that also adds cooling, with ducts tested before they are reused.
Replacement & conversionMini-split
Multi-zone mini-splits for older houses that were heated by wall furnaces and have no good place for ductwork.
Ductless & multi-zoneSmall unit
A quiet single-zone system for a backyard unit, with its own load calculation for the permit.
ADU heating & coolingPlanned early
Equipment, chases and condensate paths laid out with your designer before framing is closed.
HVAC for remodelsFresh air
ERV or HRV ventilation for houses that have been tightened, plus filtration for damp, bay-side air.
Ventilation & IAQReference project
High-end residential remodel
This project was in Berkeley, not Alameda. It is a good picture of how we handle an older house where there are few places to put equipment and the interior finishes matter.
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 projectLocal projects
Real jobs our own crew designed and installed. Street names only — we keep clients' addresses private.
Mitsubishi ductless heat pump system replacing gas heat, installed and finaled with the City of Piedmont. Homeowner left a 5-star review.
Mitsubishi Diamond Contractor →Removed the old gas furnace, crawlspace asbestos abatement, new 240V circuit and a 58-gallon LG heat pump water heater (3.93 UEF) under a Piedmont permit.
Heat pump installation →Full mechanical scope for a whole-house renovation: heat pump heating and cooling, new supply and return ducting, and dedicated ventilation ducting coordinated with the GC.
Full system replacement →Mitsubishi 60k multi-zone with branch box feeding a 12k slim ducted unit, an 18k vertical air handler and 9k one-way ceiling cassettes, with fabricated return plenums.
Mitsubishi Diamond Contractor →Alameda houses
The City’s own historic-building guidance notes more than 10,000 Alameda buildings were constructed before 1930. Those houses have tall ceilings, original windows and plaster that nobody wants to cut open.
Alameda’s winters are mild and its summers are cooled by bay wind, so loads are low. The risk is oversizing. A smaller variable-speed system that stays on at low output is usually quieter and more comfortable than a large one that cycles.
Alameda is served by Alameda Municipal Power rather than PG&E. That shapes service upgrades, interconnection and which incentives you can use.
We avoid cutting finished ceilings and look at attic, basement and closet routes before any other option.
Near the shoreline, outdoor units get coil protection and are raised off the ground.
Design temperatures of 42°F and 79°F mean modest loads. Right-sizing matters more than raw capacity.
Service changes and programs follow Alameda Municipal Power, not PG&E.
HVAC design in Alameda
Alameda is a city of Victorians, Craftsman bungalows, Spanish-style stucco houses and post-war tract homes, all on an island with salt air and a municipal electric utility. Each of those details affects how we size, place and power a heat pump. We start by finding out which kind of house you have.
Design temperatures for Alameda are 42°F in winter and 79°F in summer, among the mildest in the Bay Area. Heating hours dominate, and cooling is a modest load. A small, high-efficiency system with a good low-speed range is what these numbers call for.
ACCA Manual J design data · Alameda NAS
The City’s historic-building guidance notes more than 10,000 buildings in Alameda date from before 1930. Many of those are wood-frame Victorians and Craftsman houses with raised floors, tall ceilings and original plaster.
Mid-century Alameda looks different: single-story stucco ranch homes and duplexes on slab or short crawlspaces, often with a furnace in a closet or a garage. Bay Farm Island and Harbor Bay have newer homes with attic ducts.
Island living brings salt air. Outdoor units near the shoreline benefit from coil coatings and a mounting plan that keeps them off wet ground.
Old Alameda houses often have high ceilings, original wood windows and little wall insulation. Those details matter more than floor area, so we capture them room by room.
With low design loads, an oversized unit cycles on and off. We look for equipment that can modulate down to a fraction of capacity, which is quieter and uses less power.
Cutting into Victorian ceilings is rarely worth it. We look at attic, basement and closet routes first and consider concealed ductless or slim ducted units where paths are blocked.
Alameda Municipal Power serves the island, so service upgrades and some incentives follow its process instead of PG&E’s. We check early whether your project needs a service change.
Heating and cooling for houses with plaster, high ceilings and limited chases, using concealed or low-impact equipment.
Heat pump installation →Replace a gas furnace and add cooling with a ducted heat pump, reusing duct paths that test well.
Replacement & conversion →A room-by-room Manual J that reflects the real windows, floors and ceilings of an old house.
Manual J load calculations →Single-zone systems for detached and converted units on Alameda’s deep, narrow lots.
ADU heating & cooling →Mechanical design coordinated with architects on historic and design-sensitive projects.
HVAC for remodels →Factory-recognized installation with extended coverage on qualifying systems.
Diamond Contractor →Heat pump work in Alameda is permitted through the City of Alameda’s building division. We prepare equipment specs, Title 24 documents and the load calculation, and we schedule inspections.
Alameda is not served by PG&E or Ava Community Energy. Alameda Municipal Power is both the city’s electric utility and its generation provider. Its rebates and electrification programs are separate from PG&E and Ava programs, and they change over time, so we check what AMP is offering when we quote. Statewide and regional programs may still apply. See our rebates page for the general picture.
The East End, West End, Park Street and Webster Street areas, Bay Farm Island and Harbor Bay, plus Oakland’s Fruitvale and Jingletown neighborhoods nearby.
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 reviewsAlameda project steps
We start from the house you have and finish with equipment that would pass a second look from an inspector.
We identify the era of construction, the existing heat source, the crawlspace or attic access and the panel or service size.
Room-by-room loads using Alameda design temperatures and the house’s actual windows, walls and ceilings.
A heat pump matched to those loads, with attention to low-speed capacity for the mild climate.
Duct and line-set paths drawn to preserve finishes, and permit documents prepared for the City of Alameda.
Gas capped and old equipment removed, new system installed, ducts sealed and electrical completed with Alameda Municipal Power requirements in mind.
Airflow, charge and controls checked, inspection completed, and a handoff covering how to use it.
Install details
Outdoor equipment is mounted off the ground and, near the water, specified with corrosion protection. Condensate, line sets and electrical are routed so they do not cut across the front of a historic façade.
We test airflow and charge before leaving and give you the paperwork.
Tell us about the projectOutdoor pad or bracket set for drainage, clearance and corrosion exposure.
Ducts or line sets run through attics, closets or crawlspaces rather than through plaster.
Service and circuits checked against Alameda Municipal Power requirements.
System verified and documented for the inspector and for you.
Cost
A smaller, well-sized system for a mild climate often costs less in equipment than people expect. The bigger swings come from routing through old framing, concealed installation, electrical service work and the number of zones.
Complex whole-home and design-build projects can exceed these ranges. Rebates and incentives may reduce your net project cost.
Alameda estimates
Let us know the year of the house, the current heating, any rooms that never get comfortable, and whether a remodel is planned.
Project Inquiry
Thanks — your project details are on their way to 3rdGen. We’ll review them and follow up about the next step.
Working with designers
Many Alameda remodels involve preserving original features. We coordinate with your designer so vents, line sets and equipment are placed with the house’s character in mind.
We work with project teams in Alameda and across the East Bay, or directly with homeowners.
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
What Alameda homeowners ask about municipal power, old houses and heat pump sizing.
Neither for generation. Alameda Municipal Power is the city’s electric utility. Rebates and service rules differ from PG&E and Ava areas, so we check AMP’s current programs when we quote.
Often. We look at attic and basement duct paths, slim concealed fan coils and ductless layouts so most of the work stays out of finished ceilings and walls.
Usually smaller than people expect. Design temperatures of about 42°F in winter and 79°F in summer keep loads modest. We calculate it with Manual J instead of copying the old furnace size.
Near the water, it can shorten the life of unprotected coils. We discuss coil coatings, raised mounting and placement away from wet ground.
Yes. The City requires mechanical and electrical permits for this work. We prepare the documents and handle the inspections.
Yes. We size a single-zone or small multi-zone heat pump to the unit’s own load and provide the calculation for the permit.
Sometimes. We calculate panel capacity for the heat pump and any EV charger or induction range you plan to add, and check what Alameda Municipal Power requires for a service change.
Nearby service areas
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