Monday - Saturday : 9:00 AM to 6:30 PM 
Call our AC Experts 504-636-8724
If you have never had a central air conditioning system installed before, or if your last installation was years ago, knowing what to expect can make the whole experience much less stressful. New Orleans homes present specific challenges that make AC installation different here than in other parts of the country: intense summer heat, high humidity, older housing stock, raised foundations, and specific city permit requirements all factor in. This page walks through the complete AC installation process from the moment you schedule a visit to the moment your new system passes its final inspection. For a complete picture of the service, visit our AC installation in New Orleans page.
A professional AC installation begins before anyone touches a wrench. The first step is a thorough assessment of your home and a Manual J load calculation, the industry-standard method for determining exactly how much cooling capacity your home requires.
Manual J calculates heat gain in your home based on square footage, ceiling height, insulation R-values, window area and orientation, number of occupants, local climate data, and other factors. In New Orleans, this calculation carries extra weight. The extreme summer heat, high humidity, and long cooling season mean that oversizing or undersizing have real consequences beyond just comfort.
An oversized system in a New Orleans home short-cycles: it cools the air quickly but shuts off before it runs long enough to dehumidify properly. Because New Orleans humidity routinely exceeds 80 to 90 percent in summer, a short-cycling system leaves the air cool but clammy. Mold loves that combination. An undersized system runs constantly, cannot keep up on the hottest days, and wears out faster.
Any reputable HVAC contractor in New Orleans should perform a Manual J load calculation before recommending equipment. If a contractor simply asks your square footage and quotes a system size, that is a warning sign.
Once the load calculation is complete, your contractor should walk you through equipment options that meet the calculated cooling load. Key decisions include:
Brand: Premium brands like Carrier, Trane, Lennox, and Daikin offer documented reliability and comprehensive warranties. Mid-tier brands like Rheem, York, and Goodman offer solid performance at lower price points. Discuss the tradeoffs with your contractor.
Efficiency rating (SEER2): The federal minimum for new systems sold in the South is 14.3 SEER2. Higher-efficiency systems (16, 18, 20 SEER2) cost more upfront but save significantly on energy bills. In New Orleans, where the AC runs virtually year-round, higher efficiency often pays back its premium within a few years.
System type: Standard split systems (separate indoor air handler and outdoor condenser) are most common. Packaged units (all equipment in one outdoor cabinet) suit some New Orleans homes. Ductless mini-splits work well for additions, historic homes, or spaces without existing ductwork.
Two-stage and variable-speed systems: These run at lower capacity most of the time and ramp up only when needed. They do a significantly better job of dehumidification than single-stage systems, which is particularly valuable in New Orleans.
Before any physical work begins, your contractor must pull a mechanical permit from the City of New Orleans (or the appropriate parish jurisdiction for Metairie, Kenner, Mandeville, etc.). This is not optional and is required by code for all AC installations and replacements.
The permit process typically takes 1 to 3 business days in New Orleans. Most experienced contractors submit permit applications electronically and factor permit lead time into their scheduling. You should never start an AC installation without a permit in hand.
The permit is important for several reasons beyond legal compliance. It creates a record that the work was performed on your property. It triggers a required inspection after installation. And it provides documentation that matters for homeowner’s insurance claims and future property sales. A buyer’s home inspector will look for permit records on significant mechanical work.
On installation day, the first task is removing your existing system. This involves more than simply disconnecting and hauling away the old units.
Your existing system contains refrigerant, a regulated substance under EPA Section 608. Refrigerant must be recovered using certified equipment before any lines are disconnected. A technician with an EPA 608 certification is legally required to perform this step. Venting refrigerant to the atmosphere is a federal violation. When interviewing contractors, confirm that their technicians hold current EPA 608 certification.
After refrigerant recovery, the old air handler and outdoor condenser are disconnected and removed. Electrical disconnects are secured. Old refrigerant lines and line set insulation are evaluated. In many cases, particularly in older New Orleans homes, refrigerant lines from the previous system cannot be reused, and a new line set must be run.
The indoor unit, either an air handler (in a split system with electric heat strips) or an air handler paired with a gas furnace, is typically installed in the attic, a utility closet, or a designated mechanical room.
In New Orleans, attic installations are extremely common but require careful attention to a few details. The unit must be properly supported on a platform or brackets, not resting directly on attic flooring. A secondary condensate drain pan with its own dedicated drain line must be installed to catch overflow in the event the primary condensate drain clogs. Given the volume of condensate produced in New Orleans humidity, this is particularly important. A condensate overflow can quickly cause significant water damage to ceilings and walls.
The air handler is connected to your existing supply and return duct plenum. If the existing ductwork is being replaced or modified, that work happens now as well. Flexible duct connections are used at the air handler to reduce vibration transmission.
The outdoor condenser unit is placed on a concrete pad or elevated platform outside your home. In New Orleans, flood elevation requirements matter here. Condenser units in areas with significant flood risk may need to be elevated above the base flood elevation, either on an elevated pad or wall-mounted brackets.
Clearance requirements must be observed: most manufacturers require at least 18 to 24 inches of clearance on all sides for proper airflow, and at least 4 to 5 feet of clearance above the unit. Units placed too close to fences, walls, or dense plantings cannot reject heat efficiently, which degrades performance and shortens equipment life.
The refrigerant line set (the copper tubing connecting the outdoor condenser to the indoor air handler) is run during this step. Line sets must be properly insulated to prevent condensation and energy loss. In New Orleans, where ambient temperature is high, line set insulation quality is particularly important. Armaflex or equivalent closed-cell foam insulation at minimum 3/4-inch thickness is standard.
Each major component of your AC system requires dedicated electrical circuits. The outdoor condenser typically requires a 240-volt dedicated circuit with a disconnect switch mounted nearby. The air handler requires its own electrical connection. Modern systems also require low-voltage control wiring connecting the thermostat, air handler, and outdoor unit.
In New Orleans, many older homes have older electrical panels that may require evaluation before a new, higher-efficiency system is installed. Higher-efficiency systems sometimes have different amp draw characteristics than older equipment. Your contractor should verify that your electrical service is adequate for the new system and flag any concerns about the existing panel or wiring before installation day.
All electrical work must comply with the National Electrical Code (NEC) and applicable local amendments. In New Orleans, this work is typically performed by the HVAC contractor under the mechanical permit, though some installations may require a licensed electrician for panel work.
After the system is fully assembled and leak-checked, the refrigerant charge is set. This step is more technical and more important than many homeowners realize.
The correct refrigerant charge is determined by the manufacturer’s specifications, typically expressed as a target subcooling or superheat value at specific operating conditions. Technicians measure the actual system pressures and temperatures and calculate the correct amount of refrigerant to add or remove. This is done by weight on a digital manifold gauge set, not by estimating or simply pressurizing to a target pressure reading.
Before adding refrigerant, the system should be pressure-tested with nitrogen to check for leaks in the line set and coil connections. Any leaks found must be repaired before refrigerant is added. Skipping this step is a common shortcut that leads to refrigerant leaks discovered later, often after the system has already lost a significant portion of its charge.
An improperly charged system runs at reduced efficiency. Research consistently shows that a system just 15 percent low on refrigerant operates at roughly 80 percent of its rated capacity. A system significantly overcharged risks compressor damage. Precise charging is not optional.
With the system physically complete and properly charged, the commissioning process confirms that everything is operating within specifications.
Commissioning typically includes:
At the end of commissioning, your contractor should walk you through the new system: how to use the thermostat, what maintenance is required and when, and who to call if you have questions. You should receive all equipment documentation, warranty registration information, and a copy of the permit.
After installation is complete, the City of New Orleans (or applicable parish) requires an inspection by a code official to verify the installation meets mechanical code requirements. Your contractor schedules this inspection. In New Orleans, inspection turnaround times vary but typically occur within 1 to 2 weeks of the permit being issued.
The inspection confirms key code requirements: proper refrigerant line insulation, secondary condensate drain pan, electrical disconnect installation, outdoor unit clearances, and overall workmanship quality.
After the inspection passes, the permit is closed. Keep a copy of the closed permit with your home records. This documentation is valuable if you ever sell your home, file an insurance claim involving your HVAC system, or need warranty service.
Most standard residential AC replacements in New Orleans are completed in a single day, typically 4 to 8 hours from start to finish. A straightforward replacement on a home with accessible equipment locations, functional existing ductwork, and no electrical upgrades needed usually takes a crew of two technicians about half a day.
Factors that extend installation time include:
For complex projects, a two-day installation is not unusual. Your contractor should give you a realistic time estimate during the quoting process, not just a promise that it will take “a few hours.”
Manual J is the ACCA (Air Conditioning Contractors of America) standard method for calculating exactly how much cooling capacity a home requires. It accounts for square footage, insulation, windows, local climate, and more. In New Orleans, proper sizing is especially critical because an oversized unit will fail to control humidity, creating mold risk.
You do not need to be present the entire time, but you or a trusted adult should be available at the start of the installation and at the end for the system walkthrough. The contractor will need access to the interior equipment location and will want to review the system with you at completion.
Yes. Reputable HVAC contractors include removal and disposal of your old equipment in the installation price. Confirm this when reviewing quotes. The refrigerant in your old unit must be recovered by an EPA 608-certified technician before the unit is removed.
Most AC installation work can proceed in light rain. Outdoor condenser installation and refrigerant charging require dry conditions. Your contractor will advise if weather conditions require rescheduling any portion of the work. Most will have protocols for protecting open ductwork and electrical connections from moisture during installation.
Your new system should be operational by the end of installation day once commissioning is complete. There is no “break-in” period required. Your technician will run the system through several cycles before leaving to confirm proper operation.
New AC systems require filter changes every 1 to 3 months depending on filter type and household conditions. An annual professional tune-up is recommended to check refrigerant charge, clean coils, test electrical connections, and verify airflow. In New Orleans, where systems run nearly year-round, annual service is particularly important for maintaining efficiency and reliability.
EPA Section 608 certification is required by federal law for anyone who handles refrigerants used in HVAC systems. Technicians without this certification cannot legally recover, recharge, or handle refrigerant. When interviewing contractors, confirm that all technicians who will work on your system hold current EPA 608 certification.
Handling refrigerants without EPA 608 certification is a federal violation. Additionally, New Orleans requires a licensed contractor to pull mechanical permits for AC installation. DIY AC installation is not a legal option for full system replacement in New Orleans and voids manufacturer warranties on any equipment installed.
Big Easy Air Conditioning handles the complete AC installation process for homes throughout New Orleans, Metairie, Kenner, Mandeville, Madisonville, and surrounding areas. We perform Manual J load calculations, pull all required permits, and commission every system before we consider the job done.
Call 504-636-8724 to schedule your assessment and get a written quote with no surprises.