Minuteman Mirage 27 Propane Burnisher - Manual (Page 19)

Parts and Instruction Manual - Mirage 27” Propane Burnisher Page 12
Based on the CO production rates shown above the TWA would be exceeded in a 100 x 500 x 10 foot
(empty) space after 6 hours with 2 air changes per hour. (Assumes no additional CO exposure during any 8 hour
time period),
The Graph above depicts the relationships of air exchange to time and CO ppm with cubic feet area and percent
CO emissions remaining constant.
Based on the CO production rates shown above the TWA would not be exceeded in a 100 x 750 x 10 foot (empty)
space after 8 hours with 2 air changes per hour. (Assumes no additional CO exposure during 8 hour time period)
The Graph above depicts the relationships of air exchange to time and CO ppm with cubic feet area and percent
CO emissions remaining constant.
1.5% CO 500,000cf Hours of Operation 1 2 3 4 5 6 7 8
TWA (OSHA Method) 0 Change/hr 17 51 103 171 257 380 479 616
1/2 Change/hr 14 35 62 92 123 156 189 223
1 Change/hr 11 26 42 59 76 93 110 127
2 change/hr 7 16 24 33 42 50 59 67
8 Hour Time Weighted Average (OSHA Method)
1.5% CO 750,000cf Hours of Operation 1 2 3 4 5 6 7 8
TWA (OSHA Method) 0 Change/hr 5 14 27 46 69 96 128 154
1/2 Change/hr 4 9 16 24 33 42 50 59
1 Change/hr 3 7 11 16 20 25 29 34
2 change/hr 2 4 7 9 11 13 16 18
8 Hour Time Weighted Average (OSHA Method)