AC installation in Birmingham, AL
Window units in every bedroom, an addition the old system can't reach, or a bungalow that was never built for ducts. We size new central air with a room-by-room load calculation and plan the ducts before any equipment is chosen.
A new central air installation starts with a Manual J load calculation, then a duct plan, an electrical check and a spot for the outdoor unit. Zeltman Heating & Air installs systems in homes that have never had central air, in additions and alongside existing furnaces. New equipment uses A2L refrigerants such as R-454B, and you get a written price before work begins.
What installing central air really involves in a house that never had it
Putting central air into a home for the first time is mostly a planning job. The outdoor unit and the indoor coil are the visible parts, but the ducts, the electrical circuit, the drain route and the refrigerant piping decide whether the system is quiet and even. Getting those right comes before picking a brand.
Sizing comes first. We run an ACCA Manual J load calculation using your square footage, window area, insulation, ceiling heights and which way the house faces. That number tells us the tonnage. Square foot rules of thumb tend to oversize, and an oversized unit in Birmingham humidity short cycles and leaves rooms clammy.
Then the ducts. A Manual D design sets the size of each supply run, the return path and where the registers go. In an older bungalow we look for routes through the attic, the crawlspace and closets that don't mean tearing into plaster. Where ducts truly won't fit, a ductless mini-split may serve part or all of the house better.
New split systems today use A2L refrigerants such as R-454B or R-32, since R-410A equipment is no longer installed new. These refrigerants call for matched equipment, a correctly sized line set and careful brazing and evacuation. Many A2L indoor units also carry a sensor that starts the blower if it ever detects refrigerant. Every system we install meets or beats the 14.3 SEER2 minimum that applies to most split air conditioners in the Southeast.
What we measure and plan before installing a new AC
- Room-by-room Manual J load calculation, including windows and orientation
- Manual D duct sizing, register placement and a return air path for each area
- Electrical panel capacity, a dedicated circuit and an outdoor disconnect
- Line set route, length and size for the refrigerant the system uses
- Outdoor unit location for clearance, noise, drainage and a level pad on sloped ground
- Indoor unit location in the attic, closet or crawlspace with room to service it
- Condensate drain route with a secondary pan or float switch where needed
- Thermostat location away from sun, supply registers and exterior doors
What new AC installation costs in Birmingham
$7,640 to $17,380
The lower end is a cooling coil and outdoor unit added to an existing gas furnace with usable ducts. The upper end is a full system with new ductwork in a home that never had any. Your written price follows the load calculation and duct plan, before any work starts.
Ask for a price (659) 777-4129What moves the number
- Ducts or no ducts
- Running a complete duct system through an attic and crawlspace is often the largest single part of the cost.
- System size and efficiency
- Tonnage from the load calculation, plus higher SEER2 or two-stage equipment, moves the equipment price.
- Electrical work
- A new circuit is standard. An older or full panel may also need upgrading before the system can be connected.
- Access and layout
- Low attics, tall plaster ceilings and long line set runs on sloped lots all add labor.
- One system or two
- Large or two-story homes sometimes need a second system or zoning to cool every floor evenly.
How a new AC installation runs from first visit to startup
Walkthrough and measurements
We measure rooms, look in the attic and crawlspace, check the electrical panel and talk through which rooms matter most to you.
Load calculation and options
You get the Manual J results, a duct plan and one to three equipment options with a written price for each.
Scheduling and permits
We set the install dates and handle the permit and inspection wherever your city requires one.
Ducts first, equipment second
Ductwork and the line set go in first, then the indoor unit, outdoor unit, electrical and drain. A full new system usually takes two to four days.
Startup and walkthrough
We pull a deep vacuum, charge by weight, test airflow and temperature drop, show you the thermostat and help you register the manufacturer parts warranty.
When adding central air makes sense for your home
Window units in several rooms
Three or four window units cost a lot to run, block light and still leave hallways hot. One ducted system, or a ducted and ductless mix, cools far more evenly.
A gas furnace with no cooling
Some older Birmingham homes have a furnace and ducts but never had AC. Adding a matched coil and outdoor unit is often the simplest route to central air.
A new addition or finished space
A sunroom, a primary suite or a finished basement can overwhelm the original system. A second system or a separate zone keeps the rest of the house comfortable.
A renovation with open walls or ceilings
If ceilings or floors are already opened up, it is the easiest time to run ducts and line sets without patching finished surfaces later.
Allergy and humidity trouble
Central air with good filtration pulls moisture and pollen out of the whole house, which window units can't do with any consistency.
An upstairs one system can't carry
When a two-story home has one undersized system, adding a dedicated upstairs unit can fix hot bedrooms that no amount of balancing will.
Adding central air to older Birmingham houses
Many of our installation calls come from Avondale, Forest Park, Highland Park, Norwood and Glen Iris, where homes date to the 1900s through the 1920s. Tall ceilings, plaster walls and little framing space make the duct route the hardest decision. In Woodlawn, inside our own 35212 ZIP, plenty of homes were never built for central air and still run on window units.
In Ensley, where window units are giving way to ductless and central systems, we often pair a ducted system for the main floor with a ductless head for a room the ducts can't reach. Red clay and sloped lots mean outdoor units need a level, well-drained pad, and sometimes wall brackets. Carrier, Daikin and Rheem all make A2L equipment that suits these homes.
Areas we cover most often
We repair and replace equipment from these manufacturers, plus most other makes.
Questions about AC installation in Birmingham
Most installations in homes without existing ductwork take two to four working days. Adding a coil and outdoor unit to an existing furnace with good ducts is often a one-day job. We give you the schedule along with the written price.
If the home has no ducts, yes. If it has old heating ducts, we test their size and leakage first. Some can be sealed and reused, while undersized or crushed runs need replacing so the new system moves enough air.
We decide that with a Manual J load calculation, not a rule of thumb. Insulation, windows, ceiling height and sun exposure all change the answer, so two homes with the same square footage can need different tonnage.
A2L refrigerants like R-454B are mildly flammable, so equipment is built with safeguards such as leak sensors that start the blower. For you, the main change is that installation and service need the right tools and procedures. Day to day, the system runs like any other.
Usually, yes. We add an indoor coil on the furnace, run a line set to a new outdoor unit and confirm the furnace blower can move enough air for cooling. Very old furnaces may be worth replacing at the same time.
It depends on duct routes. If the attic or crawlspace gives good access to most rooms, central air usually costs less per room. If ducts would mean opening plaster walls, ductless heads or a mix of both is often the cleaner answer.
Related services and reading
- Ductless Mini-Split InstallationDuctless comfort for bonus rooms, sunrooms, garages and older homes with no duct space.
- Ductwork ReplacementNew supply and return ductwork designed for the airflow your system actually needs.
- New Construction and Addition HVACLoad calculations, duct design and equipment for new homes, additions and finished basements.
- AC ReplacementSwap an aging or R-22 system for a matched, efficient condenser and coil.
- Why a bigger AC is not a better ACBuying guide
- Mini-splits for bonus rooms, sunrooms and old bungalowsDuctless guide
Need AC installation in Birmingham?
We answer 24/7. Tell us what the system is doing and we will tell you what happens next.