Can you put central AC in a 1960s Pacific Beach cottage without an attic?
In most cases, traditional central forced-air is not practical in older PB cottages because there is no attic for ductwork and no good wall space for trunk lines. The right answer is almost always a multi-zone ductless mini-split heat pump system, typically two or three indoor units fed from a single outdoor heat pump condenser. These installs handle cooling and heating from one piece of equipment, run quieter than window units, and qualify for SDG&E rebates plus the federal tax credit. Most cottage installs run two to four days and cost $9,000 to $16,000 depending on zones and equipment tier.