Trusted Home Energy Audit for Santa Ana Homeowners
If your energy bills keep climbing and certain rooms in your Santa Ana home never seem to hold the right temperature, the problem usually isn’t your HVAC system — it’s the building envelope around it. Our Home Energy Audit in Santa Ana finds exactly where your house is leaking conditioned air, under-insulated, or letting heat pour in through the attic and walls. Coastal Insulation Santa Ana, led by owner Ruben Castellano, performs diagnostic audits that give you a room-by-room picture of what’s actually going on. Call (714) 793-0570 to schedule yours.
This isn’t a visual walkthrough with a clipboard. We bring calibrated diagnostic equipment — blower doors, thermal imaging cameras, duct testers — and measure real numbers. That’s the difference between guessing you need insulation and knowing exactly where it belongs, what type, and how much.
What Our Home Energy Audit Service Includes
Every home energy audit in Santa Ana we perform combines four diagnostic tests, each one measuring a different way your home loses energy. Together they give you a complete performance map of your house. We don’t skip any of them, and we don’t charge you extra to combine them.
Blower Door Test
The blower door test measures how leaky your home is as a whole. A calibrated fan mounts into an exterior door frame, depressurizes the house, and lets us calculate exactly how many cubic feet of air escape per minute. When you need to know if your Santa Ana home is too tight, too loose, or just right, this test gives you the hard number. Ruben Castellano runs the test himself, then walks you through where the biggest leaks are located — often can lights, top plates, plumbing penetrations, and wall outlets.
Thermal Imaging Inspection
An infrared camera shows temperature differences inside walls, ceilings, and floors, revealing where insulation is missing, compressed, or settled. In Santa Ana’s older neighborhoods like Floral Park and Washington Square, we routinely find wall cavities with no insulation at all — something you’d never know without this scan. Coastal Insulation Santa Ana uses this data to target insulation installation at the exact voids, not blanket-spray areas that already perform fine.
Insulation Inspection
We document the type, depth, and condition of every bit of insulation in your attic, crawl space, and accessible walls. That inspection includes checking for moisture damage, rodent contamination, and compression from stored boxes or foot traffic. When we find issues, we don’t just note them — we explain which material from our lineup would best replace or supplement what’s there, whether that’s Rockwool mineral wool, Johns Manville fiberglass, or Knauf blown-in.
Duct Leakage Test
Heating and cooling ducts in Santa Ana attics commonly lose 15 to 30 percent of conditioned air through gaps at joints and seams. A duct leakage test quantifies that loss by pressurizing your duct system and measuring airflow at a fixed pressure. If your ducts are leaking, the audit report will tell you exactly how much air is being wasted and where sealing makes the biggest impact. We can then coordinate the fix with your insulation work so your newly insulated attic isn’t compromised by leaky ducts running through it.
What happens when you call
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A real person answersNo phone trees — you reach a local pro.
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You get an upfront price rangeHonest numbers before anyone is dispatched.
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A background-checked tech heads outLicensed & insured, dispatched right away.
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You approve before work beginsNothing starts until you say go.
Brands We Service for Home Energy Audit
We work with Johns Manville fiberglass and Knauf blown-in products more than most because, in Santa Ana’s mix of 1920s bungalows, 1950s ranchers, and newer McMansions, those two brands cover the widest range of real-world conditions. Johns Manville’s batt and blown products hold their R-value well. Knauf’s blown fiberglass performs consistently in big open attics where we need to get depth quickly. We know how to inspect, diagnose, and work around both, and we can tell you whether the insulation already in your home is doing its job.
We also inspect and spec Rockwool mineral wool and CertainTeed products regularly. Rockwool’s density and fire resistance matter for Santa Ana homes near busy roads and in high-wind zones. CertainTeed’s insulation fits across a lot of the mid-century construction we audit in North Tustin — Home Energy Audit and Villa Park. Whatever brand is in your home now, our audit evaluates its condition honestly. And if it’s time to replace it, your options come from eight industry-leading manufacturers — not just whatever one brand happens to be in stock.
Signs You Need Home Energy Audit Right Now
- Rooms that never match the thermostat. If one bedroom is always five degrees warmer in July or colder in January, your home has uneven heat gain and loss. That usually means missing insulation above that room or leaky ductwork nearby. An audit pinpoints the cause in an afternoon.
- Energy bills that rise without explanation. Santa Ana summers stress air conditioners hard. If your usage keeps going up despite the same habits, you’re paying for treated air that’s escaping through the attic, walls, or ducts. Our blower door and duct tests measure exactly how much.
- Dust that never seems to go away. Excess dust often comes from air leaking in through your attic, crawl space, and wall penetrations, carrying insulation fibers and particles with it. That’s a symptom of a leaky home, not just a busy household. Sealing fixes it.
- Attic temperature extreme enough to store candles. If your attic hits 130°F in summer and 40°F on winter nights, heat is driving into and out of your living space. In Santa Ana, where temperature swings between seasons are mild but summer attics cook, that heat load matters. A thermal scan shows the transfer points clearly.
- Evidence of rodents in or below the attic. Rodent droppings, nesting material, or chewed wires mean damaged, compressed, contaminated insulation. That insulation needs removal, not more layered on top. Our audit includes an inspection that documents the full extent of the damage so the fix is thorough.
Our Home Energy Audit Process — Step by Step
You’ll know exactly what’s happening at each stage. Here’s how a home energy audit with Coastal Insulation Santa Ana works, from first call to final report.
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Initial walkthrough and question session. Ruben Castellano starts by listening — which rooms bother you, what your bills have looked like, any moisture smells, any history of rodents or water damage in the attic. This tells us where to focus and what to measure first.
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Blower door and pressure testing. We install the blower door in an exterior frame and depressurize your home to measure total air leakage. Then we walk the interior with a smoke pencil and thermal camera to find exactly where outside air enters. Those locations become our air sealing priority list.
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Thermal imaging scan of walls, ceilings, and floors. The infrared camera captures temperature anomalies across your building envelope. We scan every room — not just a few spots — and document insulation voids, moisture issues, and thermal bridges.
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Attic and crawl space inspection with documentation. We get into the spaces most contractors skip. Attic depth measurements, insulation condition photos, ductwork joint checks, and venting assessment all happen now. If we find rodent activity or moisture, we document it with photos and include it in your report.
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Findings review and prioritized recommendations. You get a written report with our findings, photos, and recommendations ranked by impact. There’s no pressure to buy everything. We’ll tell you which fixes matter most for your house, what they cost, and what can wait. If you move forward with work, the same owner who ran your audit also leads the installation.
How Much Does Home Energy Audit Cost in Santa Ana?
A complete home energy audit in Santa Ana — including the blower door test, thermal imaging scan, insulation inspection, and duct leakage test — typically runs $350 to $600 depending on home size and access conditions. A smaller single-story home on a standard lot in central Santa Ana usually lands at the lower end. Larger two-story homes, or homes with difficult attic access, complex duct runs, or multiple HVAC systems, land at the higher end because the testing takes longer and requires extra setup.
What affects your price: square footage and number of zones, attic and crawl access difficulty, age of the duct system, and whether you want a full written report with repair recommendations (we include that). To avoid overpaying, ask any contractor whether their “audit” includes a blower door test or is just a visual inspection — many so-called home energy audits are a walkthrough with a flashlight. Ours includes calibrated diagnostics, full documentation, and a prioritized fix list. Call (714) 793-0570 for a free estimate. We’ll give you an exact price before we schedule anything, and there’s no obligation if you decide to wait.
Home Energy Audit Near Santa Ana — Our Service Area
We’re based in Santa Ana and perform home energy audits in Santa Ana neighborhoods including Floral Park, Heninger Park, Washington Square, and Riverview West, as well as the unincorporated areas around the city. We also regularly audit homes in Tustin, Fountain Valley, North Tustin, Westminster, Villa Park, Stanton, and Newport Beach. Most audits near Santa Ana can be scheduled within a week. For homes in central and west Santa Ana, same-week service is usually available. If your home sits in a 15-mile radius of downtown Santa Ana, call us to check current scheduling.
Serving Santa Ana, CA — Our Local Coverage Area
We’re based in the Santa Ana area and know this community well. Use the map below to see our service coverage — if you’re nearby, we can almost certainly help.
Frequently Asked Questions — Home Energy Audit in Santa Ana
A home energy audit is a diagnostic evaluation of how your home uses and loses energy through its building envelope, including the attic, walls, floors, ducts, and crawl space. In Santa Ana, Coastal Insulation performs four specific tests during an audit: a blower door test to measure air leakage, thermal imaging to locate insulation voids, a visual insulation inspection to document condition and depth, and a duct leakage test. The result is a room-by-room report with prioritized recommendations for air sealing, insulation, and duct fixes.
Most home energy audits in Santa Ana take between two and four hours, depending on home size and access. A standard single-story home with an accessible attic typically finishes in about two hours. Larger two-story homes, homes with multiple HVAC systems, or crawl spaces that need encapsulation inspection will take longer. We’ll give you a time bracket when you schedule so you can plan around it.
A complete home energy audit in Santa Ana runs $350 to $600, with most single-story homes falling in the $350 to $450 range. The variable factors are square footage, crawl space access, duct system complexity, and how much of the house we can reach without removing finishes. This includes all diagnostic testing, thermal imagery, written documentation, and a prioritized fix list. Call (714) 793-0570 for an exact quote for your home — estimates are free.
Yes, we inspect, diagnose, and work around Johns Manville, Rockwool, Knauf, and CertainTeed products regularly. If your home has any of these brands installed, our audit will evaluate whether it’s still performing to spec, how much depth you have, and whether it’s been compromised by moisture or rodents. Since we stock and install materials from eight different manufacturers, your replacement options are based on what’s right for your house, not what’s on our truck that day.
We keep same-week and sometimes next-day slots open for Santa Ana homeowners dealing with urgent issues like water leaks, post-rodent attic damage, or a sudden spike in energy bills. Emergency same-day service depends on crew availability, but if you call (714) 793-0570 early, we’ll do our best to fit you in. For urgent cases involving active moisture or rodent damage, our audit can be paired with an insulation removal inspection.
Our diagnostic work is backed by our commitment to accuracy, and the written report you receive at the end gives you a documented baseline of your home’s performance. If we recommend repairs and you hire us to perform them, Ruben Castellano personally oversees the installation and stands behind the work. We don’t promise specific energy savings percentages because every home responds differently — what we promise is honest, accurate measurement and a clear path to a better-performing house.
Clear access to your attic hatch, crawl space entrance, water heater closet, and HVAC equipment helps the audit go faster. Close all windows and exterior doors before we arrive, and turn off any exhaust fans. If you have a list of rooms that feel uncomfortable or a history of moisture problems, jot those down so we can focus on them during the walkthrough. No need to move furniture — the blower door and thermal camera work around your normal setup.
Schedule Your Home Energy Audit Service in Santa Ana Today
Stop guessing where your energy dollars go. A diagnostic home energy audit from Coastal Insulation Santa Ana gives you the exact measurements, photographs, and prioritized recommendations you need to fix your home’s performance the right way. Call (714) 793-0570 now for a free, no-obligation estimate. Ruben Castellano will be on-site for your audit — the person who sells you the work is the person who does it.
Written by Ruben Castellano, Owner at Coastal Insulation Santa Ana, serving Santa Ana and surrounding Orange County cities.