UL 305:2017 pdf download.Panic Hardware.
8 Elevated Ambient Exposure Test
8.1 A product that incorporates operating parts having a solidus point less than 1000F (538°C) shallcomply with 8.2.
8.2 Two complete samples of the panic hardware are to be placed in the direction intended for installationin an air-circulating oven and subjected to a temperature of 400°F(204C) for a period of 7 hours,Oneof these samples shall comply with the Endurance Test, Section 6, and the Emergency Operation Test,Section 7, prior to this exposure.Following this exposure, the sample is to be cooled to room temperature,may be re-lubricated with the same material that is provided at the factory or recommended by themanufacturer, and then is to comply with 7.2. Immediately upon removal from the elevated ambient, theoperating parts of the second sample are to be manipulated and caused to be actuated to confirm thatthe assembly functions as intended at the elevated temperature and that the exposure results in nomechanical malfunction of the device.The sample shall also be visually examined for signs of degradationof materials such as melting，distortion，warpage and shrinkage. Distortion and warpage is capable ofoccurring to the extent that mechanical functionability is not adversely affected as determined by themanipulation of the sample as noted above.
8.2 revised August 8,2014
9 Low Temperature lmpact Test
9.1 A product that incorporates operating parts having a solidus point less than 1000°F(538°C) shallfunction as intended, show no visible signs of damage, and comply with the Emergency Operation Test,Section 7, after being tested according to 9.2 and 9.3.
