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Custom homes · Title 24 experts
New construction HVAC specialist in San Diego
Custom home specialists and Title 24 experts. From rough-in to start-up, we design and install heating and cooling for custom homes, additions, ADUs and commercial builds across greater San Diego, working alongside builders, contractors and homeowners. Send us your plans for a free estimate.
- Free estimates on new systems
- Residential & commercial
- 5-star Google reviews
Custom home specialists. Custom homes have open layouts, high ceilings, big glass and unique rooms. We design each system around the house as it's drawn, not a one-size-fits-all package, so every room stays comfortable. Request a free estimate →
Title 24 experts
Title 24 compliance, handled
Title 24 is California's building energy efficiency code. HVAC is a big part of it, and getting it right the first time keeps your build on schedule.
Designed to code from the start
We plan equipment, ductwork and controls to meet California's Title 24 energy code, so there are no surprises at inspection.
Proper load calculations
Heating and cooling loads calculated for the actual home, so systems are sized right and meet efficiency requirements.
Sealed, tested ductwork
Ducts installed and sealed to pass duct leakage testing, with the right insulation for attics and other unconditioned spaces.
HERS verification ready
Refrigerant charge, airflow and fan efficiency set up correctly, and we coordinate with your HERS rater for the required testing.
Efficient equipment & controls
High-efficiency furnaces, heat pumps, AC and smart thermostats that fit the energy design for your project.
Paperwork to final
We help with the HVAC documentation your project needs so you can get through inspection and final sign-off.
New construction
What we handle on a new build
Planning HVAC during construction costs less and works better than fitting it in after the walls are closed.
Load calculations & system design
Equipment sized to the home or building's square footage, layout, insulation and sun exposure, so it's comfortable from day one.
Ductwork & rough-in
Supply and return duct runs, boots, plenums and line sets installed during framing, before drywall goes up.
Furnaces & heat pumps
Gas furnace, heat pump and air handler installs matched to the design and your budget.
Central AC & mini splits
Split systems for the whole house, or ductless mini splits for additions, ADUs and bonus rooms.
Commercial rooftop units
Rooftop package units and split systems for new commercial and light-commercial buildings.
Trim-out, start-up & walkthrough
Final connections, thermostats, testing and a walkthrough so the owner knows how everything works.
Builders & homeowners
Why bring us in early
- We work from your plansSend us the plans and we'll put together a free estimate and a system layout that fits the design.
- On schedule with your other tradesWe coordinate rough-in and trim-out around framing, electrical, plumbing and drywall.
- Clean, tidy duct runsProperly sized and sealed ductwork keeps airflow even and the system running efficiently.
- One crew start to finishThe same family-owned team handles design, install and start-up, and we're still here for service later.
Homes & businesses
Residential and commercial
For your home
Custom homes, additions, ADUs and major remodels. We help you choose the right system for the space and install it cleanly during the build.
For your business
New commercial and light-commercial buildings, tenant improvements and rooftop units, planned to fit your general contractor's schedule.
FAQ
New construction FAQ
When should I bring in an HVAC contractor on a new build?
As early as possible, ideally while plans are being finalized. That way duct runs, equipment locations and electrical needs are planned before framing is done.
Do you handle Title 24 requirements?
Yes. We design and install systems to meet California's Title 24 energy code, including duct sealing and leakage testing, and we coordinate with your HERS rater for verification.
Do you work with general contractors and builders?
Yes. We work with builders, general contractors and owner-builders, and coordinate our rough-in and trim-out around the rest of the schedule.
Can you give an estimate from plans?
Yes. Send us your plans and we'll provide a free estimate for the heating and cooling system.
Do you do additions and ADUs?
Yes. We can extend an existing system when it has the capacity, or install a separate system or ductless mini split for the new space.
Building something new?
Send us your plans for a free estimate on the heating and cooling system.
Or email us at mike@75hvac.com