AC Replacement
Swap a worn-out air conditioner for a correctly sized SEER2 system, with duct testing and permit work handled in one job.
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Chapman Woods sits east of the city of Pasadena, near Huntington Drive and Rosemead Boulevard.
Chapman Woods is an unincorporated part of Los Angeles County with Pasadena mailing addresses, made up mostly of 1940s and 1950s single-story homes. Many still run aging furnaces and air conditioners on original or early ductwork. Marco's replaces worn systems, upgrades ducts and installs heat pumps sized to these homes. We quote the price before starting. Call (626) 879-0711 any hour.
Overview
Chapman Woods sits east of the city of Pasadena, near Huntington Drive and Rosemead Boulevard. Although the mail says Pasadena, it is an unincorporated area of Los Angeles County, which matters for permits and utilities. The neighborhood is flat and quiet, with wide lots, tall trees and mostly single-story homes built in the years right after World War II. It sits between Pasadena, San Marino, Arcadia and East Pasadena, close to the 210 freeway.
Because so many homes went up in the same era, many of their heating and cooling systems are reaching the end of their useful life around the same time. Original ductwork has been patched more than once, and many air conditioners were added in the 1970s through the 1990s. Replacement questions are some of the most common calls we get here. We start with what the house needs and explain the options plainly.

Most Chapman Woods homes are 1940s and 1950s ranch and traditional single-story houses, often on a concrete slab or a short crawlspace, with low-pitched roofs and attics that hold the ductwork. The original heat was commonly a gas furnace in a hall closet or the garage, or a wall or floor furnace in smaller homes. Central air was added later, usually with a condenser in a side or rear yard and a coil set on top of the existing furnace.
Many homes have had additions, converted garages or new backyard units over the years. The original duct system was rarely resized for that extra space, so the newer rooms often run hot or cold.
Common problems
Some homes from this era have ducts wrapped or taped with materials that may contain asbestos. We do not disturb suspect material and will explain the steps before any duct replacement starts.
Older closet and garage furnaces show rusted burners, cracked heat exchangers and worn inducer motors. Repairs become frequent, and safety becomes the main concern.
Air conditioners from the early 2000s and before often use R-22, which is no longer produced. Recharging them is expensive, so a leak often tips the decision toward replacement.
A family room or converted garage tied to the original duct system often gets a single small register. It stays uncomfortable no matter where the thermostat is set.
Low-slope roofs and modest attic insulation let summer heat build up around attic ducts. Cooling capacity is lost before air reaches the rooms on hot afternoons.
Most requested
When a furnace and AC are both twenty or more years old, replacing them together usually costs less overall than two separate jobs and lets us match the new equipment. We run a load calculation for the home, check the electrical panel, and look at the ducts before choosing a size. In many cases we replace the ducts at the same time, because new equipment on leaky old ducts wastes much of its benefit. A heat pump is a strong option here, and adding attic insulation helps any new system run less. New backyard units can get their own ductless system.
Swap a worn-out air conditioner for a correctly sized SEER2 system, with duct testing and permit work handled in one job.
Learn moreAn old furnace swapped for a right-sized new one in the same attic, closet or garage, with venting, ducts and permit handled.
Learn moreNew attic ductwork sized for your rooms and equipment, sealed with mastic and leak tested before we call the job done.
Learn moreNew ducted and inverter heat pumps sized to your Pasadena home, with permits, line sets, electrical and duct checks included in the quote.
Learn moreAir sealing first, then blown-in insulation to the right depth, so your ceilings stop radiating attic heat into the rooms.
Learn moreHeat pump systems for backyard ADUs, garage conversions and junior units, sized correctly for small spaces and built to pass inspection.
Learn moreBecause Chapman Woods is unincorporated, permits for HVAC replacement are handled through Los Angeles County rather than the city of Pasadena, and we handle the permit where the county requires one. Electricity here is typically from Southern California Edison rather than Pasadena Water and Power, and gas is from SoCalGas. Ask about current SCE or SoCalGas rebates and state heat pump incentives when funding is open. California rules can require a duct leakage test when an AC or furnace is replaced.
Summer is the busiest time for AC replacement, so if your system is aging, spring is a calmer time to plan. Most single-story replacements here are finished in a day or two.
Questions
Chapman Woods is unincorporated Los Angeles County, so HVAC permits are issued by the county, not the city of Pasadena, even though the mailing address says Pasadena. When we replace a furnace, air conditioner or heat pump, we handle the permit where the county requires one and schedule the inspection. We explain any required duct leakage testing before the job begins.
If both are around twenty years old, replacing them together is usually the better value. It saves labor, covers one permit, and lets the furnace blower and new coil match properly. If one unit is much newer and in good shape, replacing only the older one can work. We check both and give you prices for each approach before any work.
For a typical single-story Chapman Woods home, a straight AC and coil replacement often falls in a range of about $7,280 to $12,940, and a full furnace and AC system more. Duct replacement, electrical upgrades and heat pump choices change the total. These are typical ranges. The final price comes after a technician sees the home, and we quote it before starting.
Yes. Chapman Woods is a short drive from both of our offices, and we answer (626) 879-0711 24/7, every day. If the AC fails during a heat wave or the furnace stops on a cold night, call and a technician will come out. If you smell gas, leave the home first and call SoCalGas from outside.
Call our Pasadena line any hour. A person answers, asks a few questions about the system, and gives you an arrival window.