5 out of 5 stars
"Up by Castaic Lake, summer hits hard. DC came out same day, swapped a contactor and capacitor, and we were back to 72° before dinner. Honest pricing, no upsell pressure."
Carlos N.
Castaic, CA 91384

Santa Clarita Valley · Los Angeles County
Installing a new AC in Castaic, CA is a design job before it is a labor job. DC Air and Heating installs central air conditioners, heat pumps, and complete AC-and-furnace systems across Castaic, Los Angeles County — sized by Manual J load calculation, permitted with the county, HERS-tested where required, and commissioned with documented readings. Our crews reach most Castaic addresses in about 45–60 minutes.
A full AC installation includes equipment selection matched by AHRI, removal and haul-away of the old system, a new pad and condenser set with proper clearances, a new evaporator coil or air handler, line set replaced or flushed and pressure tested, a new filter drier, plenum and duct transitions sealed with mastic, electrical disconnect and whip brought to code, a new thermostat, nitrogen purge and deep vacuum to 500 microns, and full charge verification by weight and subcooling.
Equipment that survives Castaic has to handle hot canyon afternoons off the I-5 corridor. Around Castaic Lake and Live Oak we plan installations around condensers baking on unshaded pads and duct leakage in vaulted ceilings, which changes condenser placement, coil-guard choice, and line-set routing. For homes in 91384 we typically recommend a two-stage or variable-speed condenser so the system runs long, low-speed cycles instead of hammering on and off through a 105°F afternoon.
Installed AC pricing in Castaic, CA generally lands between $11,600 and $29,400 for a complete system, driven by tonnage, efficiency tier, and any electrical or duct work. AC-and-furnace bundles for a 5-ton home run $14,490–$18,490 good, $16,490–$21,490 better, and $18,990–$24,990 best, with each step down in tonnage reducing the range. Synchrony 0% APR for 24 months is available, and our Instant Quote tool prices your exact options in about a minute.
Castaic runs hot in summer — the I-5 corridor north of Santa Clarita regularly beats the rest of the valley by a few degrees — and the mix of hillside lots and older properties along Castaic Lake means condenser placement is rarely straightforward. Newer subdivisions off Hasley Canyon are conventional tract construction; the older homes closer to the lake are anything but, and several are on well or septic with electrical services that were never intended for modern equipment. Permits are handled by Los Angeles County. Castaic is at the far edge of our radius, so we schedule it with other Santa Clarita Valley work.
We are a locally owned Los Angeles County HVAC contractor headquartered at 5345 West Avenue M8 in Lancaster — about 38–47 miles from Castaic, CA, or 45–60 minutes in normal traffic. That proximity is why same-day service is realistic here rather than aspirational. Every technician lives in the Santa Clarita Valley, every price is flat-rate and shown in writing before work starts, and every repair carries a one-year labor warranty. We hold California C-20 license CSLB #1158770, carry $2M liability coverage, and maintain a 4.9-star Google rating across 127+ verified reviews. Whatever it takes.
That comes from a Manual J calculation, not square footage alone. Insulation, window orientation, ceiling height, duct condition, and Castaic's design temperature all move the number. Oversizing is the most common mistake we correct in the Santa Clarita Valley — it short-cycles and never dehumidifies. See A/C System Maintenance in Castaic, CA.
Most Castaic changeouts finish in one day. Add a half to a full day for duct modifications, electrical upgrades, or converting to a heat pump. Permit inspection is scheduled after completion and we handle the coordination. See A/C System Maintenance in Castaic, CA.
Our trucks dispatch from 5345 West Avenue M8, Lancaster, CA 93536, roughly 38–47 miles from Castaic, CA — typically 45–60 minutes door to door. Calls placed before 4 PM are normally handled the same day, seven days a week, and dispatch texts you a live tracking link with your technician's name and ETA. See A/C System Repair in Castaic, CA.
Yes. DC Air and Heating LLC holds California C-20 HVAC contractor license CSLB #1158770, carries $2M general liability, full workers' compensation, and a $15,000 contractor's bond. We pull permits with the Los Angeles County building department and complete Title 24 / HERS verification where the work requires it. See A/C System Maintenance in Castaic, CA.
Installed AC pricing in Castaic, CA generally lands between $11,600 and $29,400 for a complete system, driven by tonnage, efficiency tier, and any electrical or duct work. AC-and-furnace bundles for a 5-ton home run $14,490–$18,490 good, $16,490–$21,490 better, and $18,990–$24,990 best, with each step down in tonnage reducing the range. Pricing is flat-rate and identical for every Castaic address — Installed systems roughly $11,600–$29,400 depending on tonnage and tier. You see the number in writing before any work begins, and there is no trip charge inside 91384. See A/C System Repair in Castaic, CA.
Yes. Approved Castaic homeowners can use Synchrony plans through DC Air and Heating: 0% for 24 months, 5.99% for 58 months, or 7.99% for 115 months. Applications run soft-pull first, take about two minutes, and can be completed at your kitchen table before the technician leaves. See A/C System Repair in Castaic, CA.
We cover all of Castaic, CA including Castaic Lake, Live Oak, Hasley Canyon, Val Verde, serving ZIP codes 91384 plus the surrounding Santa Clarita Valley. Our shop at 5345 West Avenue M8, Lancaster, CA 93536 is roughly 38–47 miles away, about 45–60 minutes in normal traffic, so Castaic is a daily route for our trucks rather than an occasional trip.
Every repair carries a one-year labor warranty, and installed equipment carries the manufacturer's parts coverage — typically ten years when we register it for you, which we always do. Extended labor coverage is available on installations. Warranty work in Castaic is scheduled at the same priority as paid service calls. See A/C System Maintenance in Castaic, CA.
Verified jobs in Castaic, CA · ZIP 91384
5 out of 5 stars
"Up by Castaic Lake, summer hits hard. DC came out same day, swapped a contactor and capacitor, and we were back to 72° before dinner. Honest pricing, no upsell pressure."
Carlos N.
Castaic, CA 91384
5 out of 5 stars
"Got three quotes for a heat pump conversion. DC was the only one who actually did a load calc instead of just sizing off square footage. The system runs quieter than the old AC ever did."
Lisa & Anthony M.
Saugus, CA 91350
5 out of 5 stars
"Two-story house in Stevenson Ranch, upstairs always 8° hotter. They installed zoning + a new return run and now both floors hold within 1°. Best HVAC decision we've made."
Sara L.
Stevenson Ranch, CA 91381
The work Castaic homeowners most often book alongside this service — matched to local conditions (hot canyon afternoons off the I-5 corridor) and ZIPs 91384.
$129 single-system tune-up; $19/mo Club Membership covers two visits a year
View a/c system maintenanceMost repairs $185–$895 flat-rate; $89 diagnostic waived on approval
View a/c system repairMost HVAC repairs $185–$895 flat-rate; $89 diagnostic waived on approval
View repair hvacMost heating repairs $185–$795 flat-rate; $89 diagnostic waived on approval
View heating system repairDispatching from 5345 West Avenue M8 in Lancaster — 38–47 miles away, about 45–60 minutes door to door. Flat-rate pricing in writing before work starts. CSLB #1158770.
Castaic, CA and the surrounding Santa Clarita Valley — ZIPs 91384. Neighborhoods covered daily: Castaic Lake, Live Oak, Hasley Canyon.
Monday–Sunday, 7:00 AM – 8:00 PM. Same-day appointments in Castaic when you call before 4:00 PM. After-hours emergency dispatch available.