Warranties

3 Months Ended

Mar. 31, 2025

Guarantees [Abstract]

Warranties

Warranties

The Company has product warranties with various terms from one year from the date of first use or 18 months for parts, data center cooling solutions, and cleanroom systems to 25 years for certain heat exchangers. The Company has an obligation to replace parts if conditions under the warranty are met. A provision is made for estimated warranty costs at the time the related products are sold based upon the warranty period, historical trends, new products, and any known identifiable warranty issues.  

Changes in the warranty accrual are as follows:

	Three Months Ended
	March 31, 2025		March 31, 2024
Warranty accrual:	(in thousands)
Balance, beginning of period	$	24,341	$	20,573
Payments made	(3,942)		(2,622)
Warranty expense	3,211		3,398
Balance, end of period	$	23,610	$	21,349

Warranty expense by reportable segment (Note 21) is as follows:

	Three Months Ended
	March 31, 2025		March 31, 2024
	(in thousands)
AAON Oklahoma	$	2,167	$	2,958
AAON Coil Products	399		180
BASX	645		260
Total	$	3,211	$	3,398