New Construction HVAC in Los Angeles & Ventura Counties
Plan heating and cooling around the building you are creating. Wind Flow AC designs and installs HVAC systems for new homes, additions, ADUs, and light commercial construction across LA County's Valley communities, the 101 Corridor, and Ventura County.
We work with builders, general contractors, and property owners on system sizing, equipment selection, ductwork, installation, and final operating checks. Share your plans and construction stage so we can discuss the HVAC scope and next steps.
California Contractor License #1161400 | C-20 HVAC
Plan the HVAC System Before Construction Limits Your Options
Heating and cooling decisions affect equipment space, ceiling layouts, duct routes, electrical needs, and future service access. Addressing these details while plans are being developed gives the project team time to resolve conflicts before work is concealed.
We review the proposed building and HVAC requirements with you. If an architect, designer, or energy consultant is already involved, share the current drawings and specifications so the installation can be coordinated with that work.
Load Calculations & Equipment Selection
A load calculation estimates the building's heating and cooling needs using information such as window area, insulation, orientation, ceiling height, and local design conditions. Floor area alone does not describe those needs.
ACCA Manual J is one recognized residential calculation method. The appropriate method and equipment selection depend on the building type and applicable requirements. We use the project information to size the system and compare suitable equipment options.
Duct Layout, Airflow & Service Access
Duct planning includes supply and return routes, available space, airflow needs, and the resistance the blower must overcome. Equipment, filters, and serviceable components also need accessible locations.
For homes with architectural ceilings or limited chases, these decisions should be coordinated with the framing and other building systems. Duct sealing and insulation are part of the installation; any required leakage testing evaluates the completed system.
Ventilation, Controls & Utility Connections
Fresh-air ventilation and exhaust need to be considered alongside heating and cooling. They are separate design needs, even when some components work together.
The project team should also establish thermostat locations, any proposed zones, electrical supply, condensate drainage, and outdoor equipment placement. Confirm which contractor is responsible for each connection and any related building work when reviewing the proposal.
HVAC Options for New Homes, ADUs & Light Commercial Spaces
The system choice depends on the layout, heating and cooling loads, available installation space, and the project's energy requirements.
Ducted heat pumps can serve rooms through a planned supply-and-return system. Ductless mini-splits may suit an ADU or another space where a different distribution approach makes sense. Room layout and door positions still matter when deciding how many indoor units are needed.
For an addition, extending the existing system requires an assessment of its available capacity, ductwork, and controls. A separate system may be an alternative. We discuss the options in the context of the actual project.
Light commercial projects also need planning around the intended use of the space, occupancy, operating hours, and ventilation requirements.
Permits, Title 24 & Energy Verification
New construction HVAC needs to follow the approved plans and applicable building and energy requirements. California's 2025 Energy Code applies to projects with permit applications submitted on or after January 1, 2026. The relevant provisions vary by building type and project scope.
Before work begins, establish who will prepare the energy compliance documents, submit permit information, arrange inspections, and coordinate any required independent field verification. We discuss the HVAC responsibilities included in our proposed scope so they can be coordinated with the builder and other project professionals.
For projects under the 2025 Energy Code, the Energy Code Compliance (ECC) program covers applicable field verification and diagnostic testing. Earlier code-cycle documents may still use HERS terminology. Required checks depend on the installed features and compliance requirements; they are separate from the installer's startup checks.
Equipment & Refrigerant Planning
Equipment selection should account for current federal and California refrigerant requirements, along with the selected system's installation instructions. The indoor and outdoor components, controls, and refrigerant must form a compatible system.
Some newer equipment uses A2L refrigerants such as R-32 or R-454B. Any required leak detection, mitigation, and installation-space provisions are specific to the equipment and installation. These details belong in the planning process before equipment is ordered or installation space is finalized.
From Plans to HVAC Completion
The sequence below describes common stages. The approved plans, permit conditions, site readiness, and agreed scope determine the actual work and schedule.
Project Review & Scope
We discuss the plans, system requirements, budget considerations, and construction timeline. The proposal should identify equipment and installation work, coordination responsibilities, and any items that need to be resolved before work proceeds.
Mechanical Rough-In
Depending on the design, rough-in can include ductwork, refrigerant piping, drains, and control wiring. Routes need to fit the approved layout and other trades' work. Required inspections must take place before concealed work is covered; the local building department determines the applicable inspection sequence.
Equipment Installation & Finish Work
Equipment setting, final connections, registers, and controls are completed as the project becomes ready for them. Some equipment may be installed earlier, depending on access and construction requirements. Changes to the floor plan or equipment selection should be reviewed for their effect on the HVAC design and schedule.
Startup, Testing & Handover
We check the installed system's operation and review its controls with the owner or designated project contact. Applicable airflow checks, adjustments, independent verification, and inspection items need to be completed for the project's scope.
HVAC completion contributes to the overall building closeout. Mechanical approval is one part of that process; the building authority determines final occupancy approval.
What Affects New Construction HVAC Cost?
The price depends on equipment capacity and type, the number of systems or zones, ductwork and ventilation needs, access, and the installation work required. Design changes and the division of work between contractors can also affect the proposal.
For a useful estimate, share the latest plans and identify any existing equipment specifications or energy compliance documents. Compare proposals using the same scope, including which design, permit, testing, and related trade costs are included.
New Construction HVAC Across Our Service Area
Our office is in Calabasas, and we serve three broader regions:
Los Angeles County / Valley Area
San Fernando Valley communities including Woodland Hills, Encino, Tarzana, Northridge, and Canoga Park.
101 Corridor
Communities including Calabasas, Agoura Hills, Westlake Village, and Thousand Oaks.
Ventura County
Communities including Ventura, Oxnard, Camarillo, Simi Valley, and Moorpark.
Contact us with the project address and ZIP code to confirm availability.
New Construction HVAC FAQs
Can a homeowner contact you directly, or must the builder arrange the work?
Both homeowners and builders can contact Wind Flow AC. Tell us who is managing the project and whether drawings or specifications are available. That helps establish the right contacts for design decisions, site access, and scheduling.
Can I request a proposal if the project already has approved plans?
Yes. Share the current approved plans, equipment specifications, and any relevant permit or energy documents. If the proposed HVAC work differs from those documents, the project team will need to determine whether revisions or further approval are required before proceeding.
Will one indoor mini-split unit serve every room in an ADU?
That depends on the layout and heating and cooling needs. Separate rooms and closed doors can limit air distribution from one indoor unit. The design should account for how the space will be used rather than assuming one unit can serve every room evenly.
How long does new construction HVAC installation take?
It depends on the scope and construction sequence. Rough-in, equipment installation, and final checks may happen at different stages. Share the target milestones so we can discuss availability and the work needed at each stage.
Discuss Your New Construction HVAC Project
Contact Wind Flow AC with:
- The project address and ZIP code.
- The building type and approximate size.
- The current planning, permitting, or construction stage.
- Any available plans, specifications, and target milestones.
We will review the request with you and discuss the next step toward an HVAC proposal.
Calabasas, CA 91302
Saturday: Closed
Sunday: 8:00 AM–7:00 PM