How Long Does AC Installation Take?

A straightforward residential AC replacement in Baldwin County takes one day. The crew arrives in the morning, the old system is removed and the new system is installed, refrigerant lines are evacuated and recharged, the thermostat is configured, and you're cooling by late afternoon. That's the typical case, and it's what we plan for on most jobs.

The cases that run longer are predictable. Here's what affects the timeline, what to expect on installation day, and the conditions that push a one-day install into a two-day install.

The typical one-day install

For a one-for-one residential AC replacement on a single-system home — same tonnage, same configuration, same indoor/outdoor unit locations, no ductwork modifications — the day looks roughly like:

• 8-9 AM: Crew arrives, walks the existing system with the homeowner, confirms scope and any last-minute questions, lays floor protection inside.
• 9-11 AM: Old equipment removed. Outdoor unit disconnected, refrigerant recovered per EPA rules, lines disconnected. Indoor air handler disconnected from ductwork and refrigerant lines.
• 11 AM-1 PM: New outdoor and indoor equipment positioned. Refrigerant lines brazed and pressure-tested. Electrical disconnect and condensate drain verified.
• 1-2 PM: Lunch / equipment commissioning. Refrigerant lines evacuated to manufacturer-required vacuum. Refrigerant charged to spec.
• 2-4 PM: System start-up. Refrigerant pressures verified. Airflow measurements. Thermostat configured and paired (smart thermostats). Operational checks across cooling and heating modes (if heat pump).
• 4-5 PM: Walk-through with the homeowner. Manufacturer paperwork handed off (registration confirmation, AHRI certificate, warranty documentation). Old equipment hauled away.

Total time: roughly 6-8 working hours. Plan to have the home accessible for that window.

What affects the timeline

Several conditions can push a one-day install into a longer project. Most of these are identifiable during the in-home consultation, so you'll know going in:

Ductwork modifications

If the existing ductwork is undersized for the new equipment's rated airflow (a common situation when upgrading to a variable-speed system), ductwork modifications add 2-4 hours per modification. A simple second return cut adds half a day. A full duct redesign is a separate, longer project.

We measure static pressure during the in-home consultation specifically to identify whether ductwork modifications are needed — and we'll tell you up front rather than discover it on install day.

Electrical service upgrades

If the new equipment requires different amperage than the existing service (often when upgrading from electric heat to a heat pump, or from a smaller AC to a larger one), the electrical disconnect, breaker, or even the line from the panel may need to be sized up. A licensed electrician sub-contractor handles this — sometimes same day, sometimes scheduled separately depending on permit timing.

Permit inspection

For replacements, the mechanical permit and final inspection typically happen the same day or within a few days. The inspector verifies code compliance — refrigerant lineset, electrical, condensate, equipment clearances, anchoring (matters in Baldwin County hurricane zones). If something fails inspection, the crew returns to correct it. We pull the permit and schedule the inspection as part of every install — that's not optional.

Multi-system installs

Two-system homes or homes with separate zones double the time roughly proportionally. A two-system install is usually a two-day project, not a 12-hour single day. We staff and schedule accordingly.

Equipment access difficulty

Air handlers in tight attics, condensers on rooftops, lineset routing through finished walls — any of these adds time. We assess access during the consultation.

Refrigerant transition

If you're replacing equipment that used R-22 (pre-2010 systems, getting rare), the lineset typically needs to be flushed or replaced because R-22 system oil isn't compatible with newer R-410A or R-454B refrigerants. That's usually a 1-2 hour addition.

What to expect day-of

A few practical things to know about install day:

Power will be off during portions of the work. The crew shuts down the AC circuit during equipment removal and during initial commissioning. Plan for warmer-than-usual indoor temperatures during the middle of the day, especially in summer. Most homes climb 5-10°F during a typical install and recover within 2 hours after start-up.

The crew lays floor protection but expect some foot traffic. Boot covers, drop cloths, and equipment dolly tracks are standard. Heavy traffic in light carpet areas is unavoidable.

Outdoor work generates some noise. Refrigerant recovery pumps run for 15-30 minutes. Brazing torches are quiet but generate brief flame-and-smoke during line connection (this is normal). Vacuum pumps run for an extended period during evacuation.

Crew lunch is typically a working lunch — they don't leave the site. Plan to have the system disrupted for the full window, not just the active-work portions.

You'll be asked to be on-site for the walk-through at the end. The crew goes through warranty paperwork, thermostat operation, filter change schedule, and post-install homeowner items. Budget 20-30 minutes for this — it's the part most homeowners regret skipping later.

Conditions that push past one day

The honest list of things that genuinely turn a planned one-day install into a two-day:

• Ductwork issues that weren't visible during the consultation
• Electrical service that needs an inspection separate from the mechanical inspection
• Equipment delivery delay (rare; we confirm equipment is on the truck before scheduling)
• Coastal-grade equipment ordered but on a different delivery schedule
• Multi-system homes (always plan as two-day)
• Refrigerant line replacement (R-22 to R-410A/R-454B transition)

The right move when one of these surfaces: pause, communicate the new timeline clearly, and finish properly rather than rushing. A rushed install creates years of operational problems that cost the homeowner more than the half-day delay would have.

What we promise on every install

Same-day completion when scope allows. A clear written timeline upfront when scope is bigger than a one-day job. Manual J load calculation on every install. AHRI matching documentation. Manufacturer warranty registration on your behalf. Permit pulled and inspection scheduled. Copies of any applicable utility-rebate or financing paperwork organized for your records.

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Air Solutions Heating & Cooling provides Baldwin County AC and heat pump installations. Family-run, founded in Daphne, licensed AL#23194.

• Schedule a Quote — free in-home consultation
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