SEER2

Definition

SEER2 is the cooling efficiency rating that replaced SEER on January 1, 2023, under the Department of Energy's updated testing procedure. Both numbers measure the same idea — how many BTUs of cooling you get per watt-hour of electricity — but SEER2 tests the equipment under higher static pressure that better matches what a real duct system imposes on a real home.

Because the test is harder, SEER2 numbers run roughly 4.5% lower than the old SEER for the same equipment. A unit labeled SEER 15 under the old standard would be about SEER2 14.3. For southern states including Texas, the current federal minimum is SEER2 14.3 for split-system air conditioners and SEER2 14.3 / HSPF2 7.5 for heat pumps.

For replacement decisions in Austin, the practical ladder is: SEER2 14.3 (minimum, single-stage), SEER2 15.2 (improved seasonal performance, often single-stage), SEER2 16-17 (two-stage compressor), SEER2 18+ (variable-speed inverter — biggest summer comfort gains).

Why it matters in Austin

Austin's cooling season runs from late March into October, so the AC works hard for roughly seven months a year. A SEER2 jump from 14.3 to 17 typically cuts a household's summer cooling bill by 15-20%, which on Austin Energy or Pedernales Electric rates is meaningful money over a 12-15 year unit life.

SEER2 also matters at sale: appraisers, home inspectors, and buyers in the Austin market increasingly notice the SEER2 rating because of how much it affects monthly carrying cost. Documenting a high-SEER2 install with the AHRI certificate is part of every Cheap Cold Air installation packet.