Air conditioning in Texas: climate, SEER2 rules and real costs
The biggest residential cooling load in America — AC drives the ERCOT grid’s summer peaks, and the 2021 grid crisis pushed Texans toward heat pumps with backup strategies in mind — that is how summer arrives in Texas, and how it should be planned for.
| DOE climate zone | 2A–4B (hot-humid to hot-dry) |
|---|---|
| Cooling degree days | ≈ 2,900 per year (approx.) |
| Summer humidity | mixed humid/dry |
| SEER2 region | Southeast — minimum 14.3 SEER2 |
| Cooling demand | very heavy |
Climate facts that drive sizing in Texas
Zone 2A–4B (hot-humid to hot-dry), mixed humid/dry summers, very heavy load (about 2,900 cooling degree days): Texas homeowners do best with modulating equipment that handles both sticky and dry spells, and with a contractor who sizes the actual house rather than the state average.
SEER2 minimums in this state
Texas sits in the DOE Southeast efficiency region: new central air conditioners must meet 14.3 SEER2, and heat pumps 14.3 SEER2 / 7.5 HSPF2 nationwide. Southern rules apply at installation — a lower-rated unit cannot legally be installed here, whatever its manufacture date. Our SEER2 guide does the savings math.
Indicative costs in Texas
| System | Typical use | Indicative installed range |
|---|---|---|
| Central AC (replacement) | existing ducts, like-for-like swap | $5,000–$9,400 |
| Ducted heat pump | cooling + heating in one | $6,600–$12,100 |
| Ductless mini-split | additions, older homes | $3,300–$6,100 / zone |
Reference ranges, not bids: labor markets and duct condition swing real prices widely. See the replacement cost guide for what moves a quote.
Equipment primers: central AC, heat pumps, mini-splits; sizing on our BTU pages; incentives in the rebates guide.
Frequently asked questions
How much does central AC or a heat pump cost in Texas?
Plan on roughly $5,000–$9,400 for central AC, $6,600–$12,100 for a heat pump and $3,300–$6,100 per mini-split zone in Texas — indicative 2026 ranges, with three itemized bids as the only real price discovery.
Does a heat pump make sense in Texas?
Yes — with very heavy cooling demand and mild-to-moderate winters, a heat pump replaces AC one-for-one and heats cheaply. The federal 25C credit (up to $2,000) plus state and utility rebates apply; see our heat pump vs AC guide.
Same efficiency region, see also: Alabama · Arkansas · Delaware · Florida · Georgia.