Whether you are replacing tract-era equipment that finally gave out or sizing a system for the first time, a new AC is only as good as the installation behind it, especially in a basin city where heat lingers well after sunset. We size every Simi Valley system with a real load calculation, not a square footage guess, and back the work with our installation warranty.
Repairing an aging system is not always the wrong call, but sometimes a new install is the smarter financial decision. These are the clearest signs it is time to stop repairing and start planning a replacement.
Most residential AC systems are built to last 12 to 15 years. Past that mark, efficiency drops and the odds of a major component failure rise sharply, even with regular maintenance.
If you have called for repairs more than twice in the last two summers, or a single repair quote is approaching half the cost of a new system, replacement usually saves money over time.
An aging or undersized system loses efficiency gradually. If your cooling bills have crept up without a change in habits, the system is likely working harder than it should to do the same job.
R-22 was phased out of production in 2020. If your system still uses it, refrigerant for a leak repair is expensive and getting harder to source, and replacement is often the more practical route.
Some rooms cold, others warm, no matter the thermostat setting, often means the system was undersized or poorly matched to the home from the start, not just a maintenance issue.
A system that short cycles or runs nearly nonstop is either the wrong size for the home or losing efficiency fast. Either way, a proper load calculation on a new install usually resolves it for good.
Simi Valley sits in a genuine basin, closed in by the Santa Susana Mountains to the south and the Simi Hills to the west, and that terrain traps heat instead of letting it drain out the way it does in more open parts of Ventura County. A system sized off a generic countywide estimate rather than this specific basin effect is a system that will struggle to keep up once the evening cooldown fails to arrive. We run a full Manual J load calculation for every installation and factor in the terrain, not just square footage.
Location within the basin matters too. Homes closer to the Santa Susana Pass hold heat later into the evening than properties down near Tapo Canyon, since the surrounding hills block the breeze that flatter parts of the county get. Most of Simi Valley was also built out fast between the 1960s and 1980s, so a replacement here often means correcting for decades-old assumptions baked into the original ductwork, not just swapping in new equipment. We evaluate duct condition and static pressure on every installation so a new system is not fighting infrastructure from a different era.
We measure the home, inspect existing ductwork, and run a Manual J calculation to determine the correct tonnage for your specific property.
You get a clear, itemized quote showing the equipment, SEER rating, and total cost before anything is ordered.
Old equipment is removed, new line sets are brazed, and the system is installed to manufacturer and code specifications, typically in a single day.
We verify refrigerant charge with digital gauges, test airflow at every vent, and walk you through the new thermostat before we leave.
Final pricing depends on tonnage, SEER rating, and your home's specific ductwork condition. These are typical ranges for a full installation in Simi Valley.
| System Type | Typical Range |
|---|---|
| 2 to 2.5 ton, standard SEER2 | $5,500 – $8,500 |
| 3 to 3.5 ton, standard SEER2 | $6,500 – $9,500 |
| 4 to 5 ton, standard SEER2 | $8,000 – $12,000 |
| High-efficiency upgrade (18+ SEER2) | Add $1,500 – $4,000 |
| New or replacement ductwork | $2,000 – $6,000 |
TOP CLUB members and financing options are available. Every quote is written and itemized before any work begins.
Free load calculation, written itemized quote, and financing options available.
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