Why HVAC is the Biggest Rebate Category in Texas
Texas summers run hot — Houston averages 99 days/year above 90°F, DFW averages 89, Austin averages 91. Cooling is the dominant load on the ERCOT grid, and reducing peak demand is the central goal of every Texas utility's efficiency portfolio.
That alignment is why HVAC equipment carries the largest single rebates. Utilities want you to install higher-SEER2 equipment because it directly reduces what they have to deliver during 4–8 PM summer peaks.
HVAC Upgrades That Qualify
- High-efficiency central air conditioning (typically 16+ SEER2)
- Gas furnaces meeting AFUE 95% or higher
- Variable-speed and multi-stage air handlers
- Matched system replacements (AC + furnace + coil installed together)
- Smart and communicating thermostats (often a separate small rebate)
- Duct sealing and replacement (covered separately under building envelope)
Efficiency Standards That Matter in Texas
Texas utility programs and federal credits both gate eligibility on equipment efficiency. The standards you'll see most:
- SEER2 — Seasonal Energy Efficiency Ratio (current standard since 2023, replacing SEER). Most Texas utility rebates start at SEER2 15.2 minimum, with tiered higher rebates at SEER2 16+ and 17+.
- EER2 — Energy Efficiency Ratio measuring cooling performance under peak conditions. Particularly relevant in Texas because of how often equipment runs at peak design temperature.
- AFUE — Annual Fuel Utilization Efficiency for gas furnaces. Federal 25C eligibility starts at 97% AFUE.
Typical Rebate Ranges in Texas
Single AC replacement (matched system, SEER2 16+):
- Oncor / CenterPoint / AEP Texas / TNMP rebate: $300–$1,800 depending on tonnage and SEER2
- CPS Energy / Austin Energy: $400–$2,500 with higher tiers for SEER2 17+
- Federal 25C credit: up to $600 for central air conditioning
- Manufacturer seasonal rebates: $300–$1,500
- Realistic stacked total: $1,500–$5,000
Installation & Verification Requirements
Most Texas utility programs require:
- Installation by a participating contractor registered with the program
- AHRI certificate matching the indoor + outdoor unit combination
- Manual J load calculation in some weatherization-bundled programs
- Refrigerant charge verification and airflow testing
- Documentation: invoice, equipment model numbers, SEER2 rating, install date
Texas-Specific Tips
- Don't skip the Manual J load calculation. Oversized systems are the #1 reason Texas homes have humidity problems. A right-sized SEER2 16 system often outperforms an oversized SEER2 18.
- Time it with attic insulation. If you're upgrading insulation anyway, do it before the HVAC replacement so the new system can be sized for the improved envelope.
- Check tonnage rules. Some Texas utility rebates cap out at 5 tons or scale by tonnage. A 4-ton replacement may rebate more per ton than a 5-ton.
- Use participating contractors. In most Texas utility programs, only enrolled contractors can submit on your behalf. Going off-list usually disqualifies the utility rebate, even if the equipment qualifies.