Document mgzvB41oGKjLjyG1r0bxOMB

1595 Garage (tail pipe at servic ing location) Granite cutting, finishing Pneumatic hand tools Surfacing machine Grinders Polishers, buffers, etc Portable Swing frame Kitchen range Laboratory hood (provide with door) Metalizing Mixers Motion picture projector (carbon arc) Local hood slipped over tailpipe 100 cfm through 3-in flexible duct for autos up to 200 hp 200 cfm through 4-in flexible duct lor trucks and autos above 200 hp 400 cfm through 4'/,-m flexible duct for Diesel engines Local hood Local hood 500 cfm 500 cfm for tools up to 2V, in diameter 1000 cfm for 2V, to 2'/, in dia meter 2,000 Ref 15 5,500-6,000 5.500-6.000 Ref 26,27 Typical hood 3 x 8 in open ing with 3 in flange Hood surrounds tool Standard wheel hood Downdraft bench Booth Booth Canopy (See Table 45-1) Bench type, 2-400 cfm per sq ft of exhaust grille but not less than 150 cfm per sq ft of plan working area 100 fpm at face 100-200 fpm indraft through opening in booth face 100 fpm at hood face Booth type Local hood Booth Enclosure Enclosure 50-100 fpm 200 fpm at hood face 125-200 fpm at booth face 100-200 fpm through feed and inspection openings 12-100 cfm (for fume and gas re moval) directly exhausted from projector housing 3,500 Ref 22,28 Ref 15,19,22,29 3,500 3,000 1,500-1,800 3,500 3,000 3,000-3,500 Recommended for larger parts (Usual cfm per gnnder 2,000-4,000) Provide drip gutter on all intenor vertical walls to catch condensed grease Ref 30 Ref 24, 31 Air supply lo cation very critical Ref 15 Not recommended for toxic materials Use higher ventilation rates for toxic materials Ref 19,22 Ref 31 1,000-1,500 cfm or 20-30 air changes per hour for heat removal