Mini-splitENERGY STAR
Senville LETO SENL-12CD
Cooling
12,000 BTU
Covers
550 ft²
Efficiency
21.2 SEER2
Noise
28 dB
$799 est.
typical retail priceHot & Humid · ~12¢/kWh · 9-month season
Air conditioning in Louisiana: sizing, costs & the right units
Louisiana pairs Gulf heat with the highest sustained humidity in the lower 48 — New Orleans dew points sit in the 70s for months. The upside: some of the cheapest electricity in the country, which softens long-season running costs.
Updated June 2026
What to look for in Louisiana
Moisture management is everything: look for strong dehumidification ratings (pints/hour) and run units long and low rather than blasting. In flood-prone parishes, mount mini-split outdoor units above grade. Cheap power makes efficiency less urgent financially — but undersized, short-cycling units still leave rooms clammy.
What cooling costs in Louisiana
Estimated at Louisiana's average residential rate (~12¢/kWh, approximate) and 8 hours/day. "Per season" assumes 9 cooling months. Your utility rate and usage will vary.
| Unit | Efficiency | Est. / month | Est. / season |
|---|---|---|---|
| Senville LETO SENL-12CD Mini-split | 21.2SEER2 | $18 | $162 |
| LG Dual Inverter LW1022IVSM Window | 15CEER | $18 | $162 |
| BLACK+DECKER BPACT14WT Portable | 6.1CEER | $63 | $567 |
Climate-matched
All 58 units Units that fit Louisiana's climate
Best portable
Portable
Midea Duo MAP12S1TBL-A
Cooling
12,000 BTU
Covers
450 ft²
Efficiency
14.7 CEER
Noise
42 dB
$579 est.
typical retail price
WindowENERGY STAR
Frigidaire Inverter FHWW084WD1
Cooling
8,000 BTU
Covers
350 ft²
Efficiency
15 CEER
Noise
52 dB
$449 est.
typical retail priceLouisiana AC questions, answered
Why does my Louisiana room feel sticky even with the AC on?
The unit is likely oversized: it cools the air fast and shuts off before removing moisture. In Louisiana, a right-sized (or even slightly conservative) inverter unit that runs continuously will leave the room drier and more comfortable than a bigger unit that short-cycles.
How much does AC cost to run in Louisiana?
At ~11.5¢/kWh — among the cheapest power in the US — an efficient 12K unit costs roughly $20–28/month at 8 hours/day. The long 9-month season matters more than the rate: annual cooling spend still rivals colder, pricier states.
What should coastal Louisiana buyers watch for?
Salt-air corrosion. Look for coated coils (e.g., gold-fin treatments) and rinse outdoor units seasonally. For window units within a few miles of salt water, expect a shorter lifespan and factor that into the budget-vs-premium decision.
Electricity rates are approximate state averages; check your utility bill for your exact rate.