Should I redo my HVAC when I remodel my Pleasanton kitchen or great room?
Often it makes sense to at least recalculate. New windows, vaulted ceilings or removed walls change the load and airflow. With walls open, duct changes are far cheaper.
Residential HVAC · Pleasanton, CA
Remodeling in Pleasanton? We plan the heat pump with the project: new loads, duct routes, equipment placement and electrical capacity, all settled before the walls close.
Remodels · Retrofits · Heat Pumps · Multi-Zone Systems
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Pleasanton scopes
Remodels and additions lead the list, followed by full replacements, backyard units and design-only calculations.
With your builder
Revised load calculations and duct reroutes for kitchen, great-room and primary-suite projects before demolition begins.
HVAC for remodelsNew square footage
Dedicated heat pump capacity for the added space, so the original system is not asked to carry it.
Additions & remodelsWhole home
Furnace and AC replaced by variable-speed heat pumps, with ducts reviewed and electrical capacity checked.
Replacement & conversionDetached units
A small heat pump selected from the unit’s own Manual J, with Title 24 paperwork support.
ADU heating & coolingDesign only
Calculation and design documents for architects, permits or comparing bids.
Manual J load calculationsFiltration
Better filters and balanced fresh air for homes that see wildfire smoke.
Ventilation & IAQRemodel example from Berkeley
High-end residential remodel
A published Berkeley remodel with a six-zone ductless system. It is not in Pleasanton, but shows how we coordinate equipment placement and rough-in with a general contractor.
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
Recent installs by the 3rdGen crew that serves Pleasanton: ducted and ductless heat pumps, air handlers and ductwork.
Before the walls close
Pleasanton has a wide mix of homes: older houses near downtown, subdivisions from the 1970s and 80s, custom homes in the hills and newer communities. A lot of them are in some stage of remodel or addition.
Every change to windows, ceilings or floor area changes the heating and cooling load. We recalculate for the finished house, then design the equipment and ducts around that, ideally while the framing is still open.
Additions often share a trunk with the original house. We separate or resize so the far rooms get their share of air.
Design cooling temperature is about 93°F with wide daily swings. Variable-speed equipment handles the peak and idles efficiently afterward.
Outdoor units on slopes need level pads, drainage and line-set routes that avoid obstacles.
Homes near the ridge benefit from higher-capture filters and a fresh-air plan that works with the windows shut.
Pleasanton HVAC planning
Pleasanton homeowners tend to invest in their houses: kitchen and great-room remodels, second-story additions, backyard units and whole-house energy upgrades. Each of those changes the load. We treat HVAC as part of the project, so equipment, ducts and electrical are settled before walls close.
ACCA lists Pleasanton at 32°F winter and 93°F summer design, with a daily range around 35°F. Hot, dry afternoons are the sizing driver. Cool nights mean a heat pump spends many evenings at low speed, which is where a well-matched variable-speed unit earns its keep.
ACCA Manual J design data · Pleasanton, CA (ACCA micro-climate)
Pleasanton has everything from older homes near downtown to 1970s and 80s subdivisions, larger custom houses in Ruby Hill and the hills, and newer communities. Equipment ages differently across all of these, and so do the problems.
Older downtown-area homes may have crawlspace construction, additions that were bolted on, and duct systems that grew in stages. The load has changed, and the system often has not.
Hillside and ridge-adjacent properties raise two extra questions: how smoke affects indoor air during wildfire season, and how to site outdoor equipment on a slope.
Larger windows, vaulted ceilings or a new second floor can push the cooling load up. We redo Manual J for the finished house, not the one the old system was installed in.
Manual S checks capacity at the 93°F design point and at partial load. We favor variable-speed equipment that can handle the peak and still run efficiently the rest of the time.
Manual D starts with a look at what exists. Where additions share a trunk with the original house, we separate or resize so far-end rooms get the airflow their load calls for.
Hill-side and ridge-adjacent homes can see smoke. We spec higher-efficiency filtration and discuss controlled fresh air so a closed house still has clean air.
Duct reroutes, load updates and equipment placement worked out with your contractor before demolition.
HVAC for remodels →Dedicated heat pump capacity for new floor area so it does not overload the existing system.
Additions & remodels →Replace gas furnace and AC with variable-speed heat pumps designed around the whole house.
Replacement & conversion →A right-sized heat pump for an accessory dwelling, with Title 24 support.
ADU heating & cooling →Manual J, S and D documents for permits, architects or a second opinion.
Manual J load calculations →Filtration and fresh-air ventilation for hillside homes.
Ventilation & IAQ →Mechanical permits in Pleasanton are issued by the City’s Building and Safety Division. We provide the load calculation, equipment documentation and site plan. If a remodel permit is already open, we can coordinate so the HVAC work rides on the same inspection schedule where possible.
Pleasanton customers get generation from Ava Community Energy by default, with PG&E delivering the power. Rebates such as TECH Clean California and BayREN are subject to change. We confirm what is open before you buy.
Pleasanton neighborhoods from downtown to Ruby Hill and the hills, plus nearby Dublin, Livermore and San Ramon.
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 reviewsProcess
On Pleasanton remodels, we line up our steps with your builder’s so the mechanical work never holds up the schedule.
We read the drawings, visit the home and note existing equipment, ducts and any planned changes.
Loads based on the new windows, ceilings, insulation and floor area, not the house as it was.
Equipment is selected for the loads and duct layouts are drawn so they can be coordinated with framing.
Submittal to Pleasanton Building and Safety, and a shared plan for chases, closets and outdoor pads.
Ducts and line sets go in before insulation and drywall. Equipment is installed after finishes.
We verify charge, airflow and zoning, then walk through the system with you.
Coordinated scope
When HVAC is part of a remodel, timing matters. We rough in before insulation and drywall, and finish after, so you do not pay to open walls twice.
At the end, each system is commissioned and documented.
Tell us about the projectEquipment and duct locations agreed with your builder before framing inspection.
Ducts and line sets installed while walls and ceilings are open.
Panel capacity and circuits coordinated with the electrician.
Equipment set, charge and airflow verified, controls demonstrated.
Cost
On Pleasanton jobs, scope matters more than the equipment line: new floor area, duct rework, electrical capacity, outdoor pad on a slope and any ventilation. Planning HVAC with the remodel keeps those costs predictable.
Complex whole-home and design-build projects can exceed these ranges. Rebates and incentives may reduce your net project cost.
Project inquiry
Share your plans or a description of the house and what you want changed. We will review and tell you whether it is a fit.
Project Inquiry
Thanks — your project details are on their way to 3rdGen. We’ll review them and follow up about the next step.
Team coordination
We give Pleasanton design teams load results, equipment dimensions and duct routes early, so ceiling heights, soffits and electrical rooms are decided with HVAC in mind.
We work with architects and contractors in Pleasanton and the Tri-Valley, 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
Answers about remodels, additions and heat pumps in Pleasanton.
Often it makes sense to at least recalculate. New windows, vaulted ceilings or removed walls change the load and airflow. With walls open, duct changes are far cheaper.
Usually not without changes. A Manual J for the finished house will show whether a separate system or a zoned replacement is the better route.
ACCA lists about 93°F for cooling design and 32°F for heating. Equipment is selected against those numbers and the home’s actual load.
The City of Pleasanton Building and Safety Division. We prepare the application, including the load calculation and equipment specifications.
Yes. Ava is the default generation provider, and PG&E delivers the power. Rebates like TECH Clean California and BayREN vary, so we check current options when we scope your job.
We can specify higher-capture filtration and add balanced ventilation, so you can keep windows closed during smoky days and still have fresh air.
Sometimes. We total the heat pump load alongside any EV charger, water heater and induction range, and tell you before ordering equipment.
Nearby service areas
Project Inquiry
Thanks — your project details are on their way to 3rdGen. We’ll review them and follow up about the next step.