AC installation Orange County
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New AC systems sized and installed for Orange County homes, from a real load calculation and ductwork check to the final startup and airflow test.
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AC Installation
A new AC install isn’t just swapping the old box in the side yard for a new one. We start with a load calculation on your actual home, factoring in square footage, insulation, window count, and how many people are usually cooking dinner in that kitchen. A unit that’s too big will short-cycle and leave your rooms clammy, and one that’s too small will run nonstop chasing a 95-degree August afternoon in Lake Forest. Most Orange County homes built before the 1990s have undersized ductwork for today’s higher-efficiency systems, so we check static pressure before we ever quote equipment. Depending on your setup, that might mean a straightforward condenser swap, or it might mean adding a return, sealing leaky duct joints in the attic, or moving to a variable-speed system that handles our coastal humidity swings better than a single-stage unit. Homeowners usually call us when their current system is over 12-15 years old, repair costs keep climbing, or they’re finally tackling a room addition that needs its own cooling capacity.
The wrong size unit costs you every summer for the next 15 years.
Once we’ve sized the system, we walk you through equipment options and get a firm number in writing before anyone touches a wrench. Installation day usually runs 6-10 hours for a straight swap, longer if we’re modifying ductwork or relocating the condenser pad. A good installation means proper refrigerant charge verified with gauges, not guessed at, a level pad so the compressor doesn’t vibrate itself loose, and a startup check confirming the temperature split across the coil. A bad one is a unit that’s plugged in and left running with nobody checking the numbers, which is how you end up with a system that’s technically installed but never actually working right.
When It's Time to Replace Instead of Repair
If any of this sounds like your system, a new install is probably the better math than another repair bill.
- Your system still uses R-22 refrigerant, which is being phased out and getting expensive to source
- You’ve called for repairs two or more times in the past 12 months
- Energy bills have crept up even though you haven’t changed your thermostat habits
- The unit is 13+ years old and the compressor is starting to sound labored on startup
- You’re finishing an attic room, ADU, or addition that the current system wasn’t sized for
- Rooms on the far end of the house never quite reach the temperature you set
If you’re on the fence, we’ll give you an honest read on repair-versus-replace costs before recommending anything. Sometimes the right answer really is one more repair.
A properly sized, correctly installed AC system is one of the few home upgrades where doing it right actually pays you back in lower bills, fewer repair calls, and a system that lasts the 15 to 20 years it’s supposed to. Cutting corners on installation shows up later as a comfort problem you can’t quite explain, and by then it’s harder to trace back to day one. If you’re comparing a repair against a full new installation, our AC repair team can give you an honest read before you decide.
Why Choose Hana Hou Home
Accurate Load Calculations
We size every system to your actual home, square footage, insulation, and duct condition, not a same-as-last-time swap.
Startup & Airflow Verified On-Site
Refrigerant charge checked with gauges and temperature split confirmed before we call the job done.
30-Day Encore Promise
If the same issue shows up within 30 days of installation, we come back and fix it at no charge.
Central Split-System AC Installation
The Right Fit for Most Orange County Homes
A central split system, an outdoor condenser paired with an indoor coil and your existing ductwork, is still the most common install we do, and usually the most cost-effective when your ducts are in good shape. See our full AC services overview for how it compares to the options below.
Ductless Mini-Split Installation
No Ductwork? No Problem
Room additions, ADUs, and older homes without ducts are usually better served by a ductless mini-split, which cools individual rooms or zones without tearing into walls or ceilings for new ductwork. We size and place the indoor units based on the room, not a generic layout.
Heat Pump Installation
One System for Heating and Cooling
A heat pump handles both sides of comfort from one system, which is worth considering if you’re replacing an aging AC and furnace at the same time. See our heating installation page for how we approach sizing a heat pump for Orange County’s climate.
Frequently Asked Questions
How much does a new AC installation cost in Orange County?
It depends heavily on tonnage, efficiency rating (SEER2), and whether your ductwork needs work alongside the equipment swap. We won’t give you a number until we’ve actually measured your home and checked the ducts, because a phone quote on HVAC is usually wrong in one direction or the other.
How long does installation actually take?
A straightforward like-for-like swap typically takes 6-10 hours in one day. If we’re adding returns, resizing ductwork, or relocating the condenser, plan on it stretching into a second day.
Do I need a permit for a new AC system?
Yes, most Orange County cities require a permit for full system replacement, and we pull it as part of the job so it’s inspected and documented correctly rather than something you’d have to explain later if you sell the house.
Will a bigger unit cool my house faster and better?
No—oversizing is one of the most common mistakes homeowners ask for. An oversized unit cools the air fast but shuts off before it pulls humidity out, so the house feels cold and clammy at the same time. Correct sizing based on a load calculation beats going bigger every time.
Can my existing ductwork handle a new high-efficiency system?
Sometimes, sometimes not. Older Orange County homes, especially in areas like Santa Ana and Tustin built before modern code updates, often have ducts sized for less airflow than today’s variable-speed systems move, which is why we test static pressure before finalizing your quote.
What's covered if something goes wrong after installation?
Under our Encore Promise, if the same issue shows up again within 30 days of the install, we come back and fix it at no charge. Beyond that window, manufacturer warranties on parts and our labor coverage still apply depending on the equipment you chose.
How is a new AC installation different from an AC repair?
A repair fixes or replaces a failed part on the system you already have. An installation means the existing equipment is being replaced entirely, usually because it’s older, undersized, unreliable, or no longer worth repairing. If you’re not sure which one your home needs, our AC repair team can take a look and give you an honest answer before you commit to either one.
Will you help me decide between repairing my current AC and replacing it?
Yes. Before recommending a full installation, we walk through the repair-versus-replace math with you, covering the age of your system, how many repairs it’s needed recently, and what a comparable repair would cost. Sometimes the honest answer is one more repair, not a new system.
Does a new AC installation come with any ongoing service plan?
New systems still need an annual tune-up to run at peak efficiency, which is exactly what our ‘Ohana Membership plan covers for $14.99 a month, along with priority scheduling and a discount on any future repairs. See the membership page for full details.
How do I get a firm quote for AC installation at my home?
Call us or request service online and we’ll schedule an in-home visit to measure your space, check your existing ductwork, and walk you through equipment options. You’ll have a firm, written price before any work begins.