Nine tracked HVAC and water systems companies reported strong second-quarter results, with group revenues exceeding analysts' consensus estimates by 4.7%. Despite these results, share prices in the sector have declined by an average of 5.8% since the latest earnings reports.

Trane Technologies reported revenues of $6.35 billion, a 10.6% increase year on year, exceeding expectations by 2.3%. The company's full-year EPS guidance exceeded analyst expectations, and the stock has risen 1.3% to $452.44 since reporting.

AAON reported revenues of $627 million, up 101% year on year, outperforming analyst expectations by 24.6%. While the company beat analysts' EPS and EBITDA estimates, its stock has fallen 20% since reporting and currently trades at $75.85.

Other company performances included:

• CSW: Reported revenues of $350.7 million, up 33% year on year, beating expectations by 2.4%. The stock is up 21.1% since reporting, trading at $330.
• Advanced Drainage Systems: Reported revenues of $1.00 billion, up 20.6% year on year, beating expectations by 2%. The stock has fallen 5.9% since reporting and trades at $140.80.
• Lennox: Reported revenues of $1.55 billion, up 3% year on year, missing analyst expectations by 1%. The stock has fallen 24.9% since the results and trades at $408.69.

Industry trends such as energy efficiency and clean water are driving incremental demand for innovation, while new installations remain subject to cyclical residential and commercial construction volumes and economic factors like interest rates.