Roof hood Dimensions LHR-1 lindab | roof hoods LHR H 40 B + 100 A x B A + 100 LHR-2 Description LHR is a rectangular roof hood with ribs that is used for both outdoor air and extract air. When used for outdoor air intake it is recommended not to let the air velocity exceed 2 m/s due to risk of rain or snow pull in. The hood is supplied as standard in galvanised form, but is also available painted. LHR is supplied as standard with RJFP joint for guiding. Standard colours black RAL 9005 and grey RAL 7024. When connecting to the roof through connection TGR, the special transition piece TGR-LHR must be used (see last page). LHR-2 fits directly on TGR according to table. Ordering example LHR Product Colour, if desired A in mm B in mm Duct connection Joining metods (Type 1) S 300 300 1 RJFP H 40 50 B A A × B = Duct dimensions Roof through con- nection Num LHR-1 ber Free LHR-1 LHR-2 A B H of area m 50 100 [mm] [mm] [mm] slats m² [kg] [mm] [mm] 300 300 330 5 0,173 5,40 4 5 - 400 400 390 6 0,306 8,70 5 6 3 500 500 450 7 0,475 12,6 6 7 4 600 600 450 7 0,583 15,1 7 8 5 700 700 510 8 0,806 20,2 8 9 6 800 800 570 9 1,066 25,9 9 10 7 900 900 630 10 1,361 32,4 10 11 8 1000 1000 690 11 1,692 47,4 11 12 9 1100 1100 750 12 2,059 56,9 12 13 10 1200 1200 750 12 2,257 62,1 13 14 11 1300 1300 810 13 2,678 72,1 14 15 12 1400 1400 870 14 3,136 84,5 15 16 13 1500 1500 930 15 3,629 97,0 16 – 14 Calculation of the free area for LHR types 1 and 2 LHR-1: F A = (A + B - 0,12) × 0,09 × (n - 1) (m 2 ) LHR-2: F A = (A + B - 0,32) × 0,09 × (n - 1) (m 2 ) F A = free area in m 2 A,B= duct dimension in meter n = number of slats NOTE : To avoid water being sucked in by air intake, should the air velocity does not exceed 2 m / s between the slats. Lindab reserves the right to make changes without prior notice 1 2021-05-18
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