les se suši v pečeh toliko časa, da sredica lesa doseže najmanj temperaturo 56 °C za 30 minut v peči, ki jo je v ta namen preizkusil in odobril uradni ocenjevalni/inšpekcijski urad, ki ga je v ta namen odobrila Inšpekcijska služba za zdravstveno varstvo živali in rastlin, Oddelka za kmetijstvo ZDA;
the wood shall be kiln dried over a period of time sufficient to achieve a minimum core temperature of 56 °C for 30 minutes in a kiln tested and approved for this purpose by an official grading/inspection bureau approved for this purpose by the Animal and Plant Health Inspection Service, US Department of Agriculture;