How Long Does It Take to Replace an AC Unit
Replacing an air conditioning unit is a major task that involves planning, preparation, and professional installation. Many homeowners want to know how much time it will take before their new system is ready to use. The installation timeline depends on several factors, including the type of unit, home size, ductwork condition, and the expertise of the HVAC technician.
Average Time for AC Unit Replacement
On average, replacing an AC unit takes between 4 to 8 hours. For a straightforward swap of an old unit with a new one of similar size and design, the process can often be completed in half a day. However, more complex replacements may extend to a full day or even two days.
Factors That Affect Installation Time
Type of AC Unit
Central air conditioning systems typically take longer to replace compared to smaller ductless mini-splits. A central system requires connecting to existing ductwork, electrical wiring, and refrigerant lines, while ductless units need less structural work.
Condition of Ductwork
If ductwork is in good condition, the installation is faster. However, damaged or outdated ducts may need repairs or replacement. This additional work can add 1 to 3 days depending on the extent of changes required.
Size of the Home
Larger homes often need bigger systems, which take more time to install. A small residential system may be installed within a few hours, while larger units designed for multi-level homes take longer.
Accessibility of the Unit Location
If the air conditioning system is located in an attic, crawl space, or tight area, technicians may need extra time for removal and installation. Easy-to-reach locations speed up the process.
Permits and Safety Checks
Some states and cities require permits for AC replacement. HVAC technicians may also need to perform safety checks and inspections, which can extend the total time.
Step-by-Step Timeline of AC Replacement
- Removal of the Old Unit – Disconnecting the refrigerant, electrical wiring, and removing the old system usually takes 1 to 2 hours.
- Preparation Work – This includes setting the new pad, adjusting duct connections, or preparing the site, which may take 1 to 3 hours.
- Installing the New Unit – Placing the system, connecting refrigerant lines, wiring, and attaching ductwork usually requires 2 to 4 hours.
- Testing and Inspection – After installation, the technician checks for leaks, measures airflow, tests electrical systems, and ensures the system runs efficiently. This step takes 1 to 2 hours.
Frequently Asked Questions
How long does it take to install a central AC system in a new home?
Installing a brand-new central AC system in a home without existing ductwork can take 3 to 5 days because technicians need to design and install the duct system.
Can AC replacement be done in one day?
Yes, most replacements where ductwork is already in place can be completed in a single day, usually within 6 to 8 hours.
Does replacing ductwork add more time?
Yes, replacing ductwork can add several days to the project, depending on the size and complexity of the home.
How soon can you use the AC after replacement?
Once installation and testing are complete, the system is ready to use immediately.
Is AC replacement faster for ductless systems?
Yes, ductless mini-split systems can be installed in 4 to 6 hours, making them quicker than central systems.
Conclusion
Replacing an AC unit generally takes 4 to 8 hours, though certain conditions may extend the process. The type of unit, condition of ductwork, and accessibility of the installation site all influence the timeline. For most homeowners, AC replacement is completed in a single day, allowing the new system to operate efficiently and restore comfort quickly. Professional installation ensures safe operation, energy efficiency, and compliance with local regulations.
