Contingencies

Fuel Tech issues a standard product warranty with the sale of its products to customers. Our recognition of warranty liability is based primarily on analyses of warranty claims experienced in the preceding years as the nature of our historical product sales for which we offer a warranty are substantially unchanged. This approach provides an aggregate warranty accrual that is historically aligned with actual warranty claims experienced.

Changes in the warranty liability for the nine months September 30, 2014, and 2013, are summarized below:



	Nine Months Ended September 30,
	2014			2013
Aggregate product warranty liability at beginning of period	$	596		$	776
Net aggregate (benefit) expense related to product warranties	(147		)	208
Aggregate reductions for payments	(17		)	(89		)
Aggregate product warranty liability at end of period	$	432		$	895