AC Installation & Replacement in Baton Rouge, LA

Signs it may be time

• A failed compressor or leaking coil on a system more than about 12 to 15 years old.
• An R-22 system that needs refrigerant.
• Equipment that was flooded.
• Rising repair bills and electric bills.
• A house that never feels dry, even when the system is working.

Size for moisture, not just heat

In a humid climate, an oversized air conditioner is a real problem. It drops the temperature quickly and shuts off before the coil has had time to pull much water out of the air, so the house ends up cool and clammy. Short cycles also wear parts out. The right size comes from a load calculation (Manual J) that accounts for the home's insulation, windows, orientation, air leakage and where the ducts are. If you have added insulation, replaced windows or rebuilt after a flood since the last system went in, the right size may be smaller than what you have.

Equipment choice matters too. Two-stage and variable-speed systems spend most of their time at low speed, which runs the coil colder for longer and removes more moisture. Many also have a dehumidify mode. In Baton Rouge, those features are often worth more than a few extra SEER2 points.

Efficiency rules

Louisiana is in the Department of Energy's Southern region. Since January 1, 2023, split-system air conditioners installed here must be at least 14.3 SEER2 below 45,000 Btu/h and 13.8 SEER2 above that, and heat pumps must be at least 14.3 SEER2 and 7.5 HSPF2 nationwide (U.S. Department of Energy, 2023 Central Air Conditioner and Heat Pump Standards FAQ).

New refrigerants

New residential split systems manufactured since January 1, 2025 use lower-impact refrigerants, most often R-454B or R-32, instead of R-410A (EPA, Technology Transitions HFC Restrictions by Sector). The indoor coil and outdoor unit need to be designed for the same refrigerant and rated as a combination, so replacing only the outdoor half of an older system is often not an option. The line set may need replacing or flushing.

Baton Rouge installation details

• Attic units: a secondary drain pan under the air handler or furnace, a float switch, and a properly sloped drain line with a cleanout protect the ceiling below.
• Furnace pairings: many homes have a gas furnace with an AC coil on top. When replacing the AC, the coil and often the furnace blower need to be compatible.
• Flood elevation: in flood-prone areas, raising the outdoor unit on a stand and placing indoor equipment higher can protect it. Your parish's floodplain rules may apply.
• Surge protection: storms and grid switching create surges that damage control boards.
• Ducts: a new system on leaky or undersized attic ducts will not deliver its rated performance. See ductwork.

What a complete quote includes

• Model numbers for every component and the AHRI certificate number for the combination.
• SEER2 (and HSPF2 for heat pumps, AFUE for gas furnaces).
• Whether the line set, pad or stand, drain pan, float switch, thermostat and disconnect are new.
• Duct inspection and any sealing or modifications.
• Permit, removal of old equipment, and manufacturer warranty registration.

Related guides

• Your HVAC System After a Flood: A Baton Rouge Guide

Sources: U.S. Department of Energy, 2023 Central Air Conditioner and Heat Pump Standards FAQ; EPA, Technology Transitions HFC Restrictions by Sector; EPA, A Brief Guide to Mold, Moisture and Your Home.