Chandler started downtown. Alexander J. Chandler opened the town-site office in May 1912, and the San Marcos Hotel opened in November 1913. The blocks around the square still hold some of the oldest buildings in the city, and the homes nearby range from early 20th-century houses to mid-century ranches and small infill builds. That mix creates cooling problems the newer master-planned parts of Chandler do not have.
What makes older downtown homes different
- Systems added after construction. Homes built before central air were retrofitted later. Ducts were squeezed into whatever space existed, often undersized and with few returns.
- Low or no attics. Flat roofs and shallow attics leave no room for an air handler, which is why many older Chandler homes use rooftop package units.
- Little insulation. Older walls and roofs gain heat quickly, so equipment sized by a modern rule of thumb can fall short.
- Electrical limits. Older panels may not have the capacity for a larger system or added heat strips. The city’s permit manual includes an electrical load worksheet with a line specifically for air conditioning.
Options that suit downtown houses
Ductless mini-splits. Wall or ceiling heads fed by a small outdoor unit, no ducts needed. They suit additions, converted garages and homes where running ducts would mean opening ceilings.
Rooftop heat pump package units. A like-for-like swap for many flat-roof homes, with heat included. Placement and roof condition matter; a roof that is near the end of its life should be addressed first.
Duct redesign. Where there is some attic space, adding returns and resizing trunk lines can fix rooms that never cool.
Permits
Chandler’s Development Services department handles building permits from 215 E. Buffalo St. The city’s Homeowner’s Building Permit Manual (revised April 2026) exempts like-for-like swaps of water heaters, furnaces and evaporative coolers, but it does not list air conditioners or heat pumps as exempt. If you are unsure whether your job needs a permit, the city’s Plan Reviewer of the Day takes questions at 480-782-3078. We pull the permit when one is required, and we tell you before work starts.
Before you replace anything
- Ask for a load calculation, not a tonnage guess.
- Ask whether your electrical panel can carry the new equipment.
- For rooftop units, ask whether a crane and curb adapter are included.
- Ask how the new system will reach the rooms that are hottest today.
Own an older home near downtown Chandler? Call 480-719-8109 — a real person in the East Valley answers.