serie L High performance air handling unit from 1.000 to 100.000 m 3 /h General features Available in 18 sizes, capable of covering airfl ow rates from 1000 to approx. 100000 m³/h, the L series air handling units offer an optimal solution for all systems that demand air-conditioning and air treatment in general, whether it be utilised in a home or industrial situation. For this reason, the units employ a wide range of materials, components and accessories so that every environmental comfort request is satisfied, while respecting fully the technical regulations of the sector. L series air handling units are also selectable by CD-ROM selection program, which offers the user the ability to choose, within the standard size range, various constructive solutions suggesting an infi nite array of eventual compositions, interacting comfortably between each proposed section, in each of those a complete list of accessories is available. The experience and service of LMF Technical Department can help the Customer for the project. They are available in the following versions: L 42 25 mm panel thickness; L 44 42 mm panel thickness; L 64 45 mm panel thickness; L 66 62 mm panel thickness; L 4H 42 mm panel thickness cleanable type. Constructive features The frame is made from extruded aluminium profiles, connected together by fi breglass-reinforced nylon two-way or three-way joints; the panels, sandwich type, are fastened to the frame using steel screws, not in sight from the inside of the unit; EPDM gasket, threaded into the aluminium profi les, make the structure airtight, while the inspection doors are fi tted with hinges and double handles (closing from the outside/inside) or fully removable type. The unit rests on an aluminium continuous baseframe, ensuring high structural stiffness and enabling the safe transport and on-site moving. The thermal and acoustic insulation is made from 40 kg/ m 3 density polyurethane or 80 kg/m³ density mineral wool and thermal transmission coeffi cient value is 0,38 W/m 2 K (T1 class according to EN 1886) to 1,39 W/m 2 K (T3 class according to EN 1886); average sound attenuation is 23 to 35 db. The material used for panels can be: - galvanized steel - prepainted galvanized steel RAL 7004 - aluminium alloy - stainless steel (AISI 304 or AISI 316) Fan sections, supplied with safety systems, can have inside high effi ciency forward or backward curved centrifugal fans and one or two speed electric motors; in their specific accessory list, frequency converter and explosion proof motor & fan construction are to be marked. L series allows the selection of all common unit air filters, relating to type, effi ciency class and dimensions (i.e., from G3 fi lters to H13 HEPA fi lters); this fl exibility is also for humidifying systems, both water and steam type. Concerning heat recovery, L series offers the possibility to choose from the following system of heat saving (categories according to EN 308): - crossfl ow heat recovery with aluminium plates; up to 60% effi ciency; category 1 - closed circuit twin or multi remote coils; up to 50% efficiency; category 2a - hygroscopic thermal wheel; up to 85% efficiency; category 3.
SELECTION CHART AND DIMENSIONS Size L42 L44 L64 L66 L4H L (mm) H (mm) L (mm) H (mm) L (mm) H (mm) L (mm) H (mm) L (mm) H (mm) 016 780 700 780 700 820 740 800 740 780 700 022 880 760 880 760 920 800 920 800 880 760 026 840 880 840 880 880 920 880 920 840 880 033 900 940 900 940 940 980 940 980 900 940 041 1140 880 1140 880 1180 920 1180 920 1140 880 054 1290 940 1290 940 1330 980 1330 980 1290 940 065 1440 1000 1440 1000 1480 1040 1480 1040 1440 1000 088 1440 1180 1440 1180 1480 1220 1480 1220 1440 1180 110 1560 1300 1560 1300 1600 1340 1600 1340 1560 1300 130 1560 1540 1560 1540 1600 1580 1600 1580 1560 1540 160 1810 1540 1810 1540 1850 1580 1850 1580 1810 1540 210 2160 1660 2160 1660 2200 1700 2200 1700 2160 1660 260 2280 1840 2280 1840 2320 1880 2320 1880 2280 1840 320 - - - - 2320 2300 2320 2300 2280 2260 410 - - - - 2770 2300 2770 2300 2730 2260 520 - - - - 3270 2420 3270 2420 3230 2380 640 - - - - 3920 2420 3920 2420 3880 2380 810 - - - - 5400 2300 5400 2300 5360 2260 W = width (air or water connection excluded) H = height (baseframe included); for two level units, total height is approx. (2H 100)
Extremely easy internal components access for inspections and maintenance Possible use of a big different quantity of fi lter systems It is possible to use all the conventional systems for energy recovery The fan section is mounted on antivibrating mounts. The antivibrating joint between the mouth of the fan and the frame of the unit. The safety guard protection. The electric motor on belt adjuster.
TYPICAL LAYOUT > Air intake with damper. > G4 prefi lter and F7 rigid bag fi lter; > Cu-Al 6 row cooling/heating coil; Condensate drain tray; Airfl ow m 3 /h Pa kw kw kw mm mm mm L42-016 1700 200 0,55 20,3 15,4 1960 700 780 L42-022 2400 200 1,1 28,6 22,0 2030 760 880 L42-026 2800 200 1,1 33,2 24,7 2080 880 840 L42-033 3500 200 1,5 41,6 31,4 2150 940 900 L42-041 4400 200 1,5 52,6 40,6 2150 880 1140 L42-054 5800 200 2,2 68,6 50,6 2230 940 1290 L42-065 7300 200 3,0 87,0 66,4 2310 1000 1440 L42-088 9300 200 3,0 111 84,0 2390 1180 1440 L42-110 11600 200 4,0 139 107 2530 1300 1560 L42-130 14500 200 5,5 173 133 2630 1540 1560 L42-160 17500 250 7,5 210 166 2810 1540 1810 L42-210 23000 250 9,2 270 195 2930 1660 2160 L42-260 27000 250 11 320 234 3110 1840 2280 L64-320 35000 300 15 413 302 3440 2300 2320 L64-410 43000 300 18,5 513 391 3660 2300 2770 L64-520 56000 300 22 672 527 3640 2420 3270 L64-640 70000 300 30 844 679 3640 2420 3920 L64-810 88000 300 2x18,5 1046 796 3660 2300 5400 External air temperature 5 C bs ( >27 C) - water temperature inlet 45 C outlet 40 C. External air temperature 32 C bs 50% ru ( <17 C) - water temperature inlet 7 C outlet 12 C. Confi guration 1 > Air intake with damper; > G4 prefi lter and F7 rigid bag fi lter; > Cu-Al 6 row cooling coil; Confi guration 2 Airfl ow m 3 /h Pa kw kw kw mm mm mm L42-016 1700 200 0,75 18,3 15,4 2360 700 780 L42-022 2400 200 1,1 25,0 22,0 2430 760 880 L42-026 2800 200 1,1 30,1 25,6 2480 880 840 L42-033 3500 200 1,5 37,8 32,3 2550 940 900 L42-041 4400 200 1,5 47,7 40,6 2550 880 1140 L42-054 5800 200 2,2 62,8 55,1 2630 940 1290 L42-065 7300 200 3 76,8 66,4 2710 1000 1440 L42-088 9300 200 3 97,8 84,0 2790 1180 1440 L42-110 11600 200 5,5 123 107 2930 1300 1560 L42-130 14500 200 5,5 153 133 3030 1540 1560 L42-160 17500 250 7,5 187 166 3210 1540 1810 L42-210 23000 250 9,2 248 224 3330 1660 2160 L42-260 27000 250 11 294 266 3510 1840 2280 L64-320 35000 300 15 379 345 3840 2300 2320 L64-410 43000 300 18,5 471 391 4060 2300 2770 L64-520 56000 300 30 615 527 4060 2420 3270 L64-640 70000 300 30 770 679 4060 2420 3920 L64-810 88000 300 2 x 18,5 956 796 4060 2300 5400 External air temperature 5 C bs ( >23 C) - water temperature inlet 80 C outlet 70 C. External air temperature 32 C bs 50% ru ( <16 C) - water temperature inlet 7 C outlet 12 C.
Confi guration 3 steel outside, insulating material; and transmission with belt; > Mixing box with dampers; > G4 prefi lter and F7 rigid bag fi lter; > Cu-Al 6 row cooling coil; Airfl ow m 3 /h Pa kw kw kw mm mm mm L42-016 1700 200 0,75 0,25 15,9 13,0 2800 1300 780 L42-022 2400 200 1,1 0,37 12,1 18,7 2870 1420 880 L42-026 2800 200 1,1 0,55 26,1 21,8 2920 1660 840 L42-033 3500 200 1,5 0,55 32,9 27,5 3090 1780 900 L42-041 4400 200 1,5 1,1 41,5 34,6 3090 1660 1140 L42-054 5800 200 2,2 1,1 54,6 42,6 3170 1780 1290 L42-065 7300 200 3 1,1 66,6 56,4 3350 1900 1440 L42-088 9300 200 3 2,2 88,3 71,3 3530 2260 1440 L42-110 11600 200 5,5 2,2 106 90,7 3670 2500 1560 L42-130 14500 200 5,5 2,2 133 113 3970 2980 1560 L42-160 17500 250 7,5 4 162 142 4150 2980 1810 L42-210 23000 250 9,2 5,5 215 193 4270 3220 2160 L42-260 27000 250 11 5,5 256 231 4550 3580 2280 L64-320 35000 300 15 7,5 330 297 5110 4500 2320 L64-410 43000 300 18,5 11 410 332 5230 4500 2770 L64-520 56000 300 30 15 536 451 5310 4740 3270 L64-640 70000 300 30 15 671 584 5310 4740 3920 L64-810 88000 300 2 x 18,5 2 x 11 834 676 5230 4500 5400 External air temperature 5 C bs ( >30 C) - water temperature inlet 80 C outlet 70 C. External air temperature 30 C bs 50% ru ( <16 C) - water temperature inlet 7 C outlet 12 C. centrifugal fan, three-phase electric motor and transmission with belt. > Mixing box with dampers. > G4 prefi lter and F7 rigid bag fi lter; > Cu-Al 6 row cooling coil; > Evaporative pack eff. 70% humidifier (not recycled water); > Cu-Al 1 row post-heating coil; Confi guration 4 Airfl ow Pre-heating Post-heating power m 3 /h Pa kw % kw kw mm mm mm L42-016 1700 200 0,75 0,25 15,9 13,0 7,7 5200 700 780 L42-022 2400 200 1,5 0,37 22,1 18,7 11,0 5340 760 880 L42-026 2800 200 1,1 0,55 26,1 21,8 12,4 5440 880 840 L42-033 3500 200 1,5 0,55 32,9 27,5 15,7 5780 940 900 L42-041 4400 200 2,2 1,1 41,5 34,6 20,2 5780 880 1140 L42-054 5800 200 3 1,1 54,6 42,6 25,2 5940 940 1290 L42-065 7300 200 3 1,5 66,6 56,4 32,4 6300 1000 1440 L42-088 9300 200 4 1,5 88,3 71,3 41,0 6660 1180 1440 L42-110 11600 200 5,5 2,2 106 90,7 51,4 6940 1300 1560 L42-130 14500 200 7,5 3 133 113 64,3 7540 1540 1560 L42-160 17500 250 9,2 4 162 142 78,5 7900 1540 1810 L42-210 23000 250 11 5,5 215 163 105 8140 1660 2160 L42-260 27000 250 15 5,5 256 196 125 8700 1840 2280 L64-320 35000 300 18,5 9,2 330 253 160 9740 2300 2320 L64-410 43000 300 22 11 410 332 200 9980 2300 2770 L64-520 56000 300 30 15 536 451 262 10140 2420 3270 L64-640 70000 300 37 15 671 584 328 10140 2420 3920 L64-810 88000 300 2 x 22 2 x 11 834 676 406 10140 2300 5400 External air temperature 5 C bs ( >30 C) - water temperature inlet 80 C outlet 70 C. External air temperature 30 C bs 50% ru ( <16 C) - water temperature inlet 7 C outlet 12 C. External air temperature 15 C bs 50% ru ( >28 C) - water temperature inlet 80 C outlet 70 C. 5
Confi guration 5 > G4 prefi lter on the side; > G4 prefi lter on the fresh air side; > Crossfl ow heat recovery with built-in bypass damper for free-cooling mode, fresh air damper and exhaust air damper; efficiency m 3 /h Pa kw % kw kw mm mm mm L42-016 2100 200 0,75 0,75 50,2 7,8 17 2090 1300 780 L42-022 2800 200 1,1 1,1 54,5 11,7 23,5 2260 1420 880 L42-026 3400 200 1,1 1,1 50,5 12,5 27,4 2310 1660 840 L42-033 4200 200 1,5 1,5 55,6 18,0 35,8 2580 1780 900 L42-041 5300 200 2,2 2,2 56,4 23,0 45,2 2580 1660 1140 L42-054 7000 200 3 3 53,9 29,0 59,6 2660 1780 1290 L42-065 8800 200 3 3 56,1 38,0 75,9 2840 1900 1440 L42-088 11000 200 4 4 56,4 47,8 95,0 3120 2260 1440 L42-110 14000 200 5,5 5,5 57,2 61,7 116 3360 2500 1560 L42-130 17500 200 7,5 7,5 55,9 75,3 145 3760 2980 1560 L42-160 21000 250 9,2 9,2 55,9 90,4 176 3940 2980 1810 L42-210 26000 250 11 11 55,4 111 224 4060 3220 2160 L42-260 30000 250 15 15 50,2 117 263 4240 3580 2280 L64-320 37000 300 18,5 18,5 50,1 144 328 4850 4500 2320 L64-410 48000 300 22 22 50,2 187 423 5270 4500 2770 L64-520 58000 300 30 30 50,1 225 525 5250 4740 3270 L64-640 68000 300 30 30 50,1 264 629 5250 4740 3920 L64-810 90000 300 2 x 18,5 2 x 18,5 50,2 350 404 5270 4500 5400 External air temperature -5 C bs - Room air temperature 20 C bs. Inlet air temperature 8 C bs ( >32 C) - water temperature inlet 80 C outlet 70 C > G4 prefi lter on the side; > G4 prefi lter on the fresh air side; > Crossfl ow heat recovery with built-in bypass damper for free-cooling mode, fresh air damper, mixing damper and exhaust air damper; > F7 rigid bag fi lter; > Cu-Al 6 row cooling coil; Confi guration 6 efficiency power m 3 /h Pa kw % kw kw kw mm mm mm L42-016 1700 200 0,75 0,55 53,0 6,9 15,2 13,0 3360 1300 780 L42-022 2400 200 1,1 0,75 56,7 10,5 21,6 18,7 3530 1420 880 L42-026 2800 200 1,5 1,1 52,9 11,4 25,0 21,8 3680 1660 840 L42-033 3500 200 1,5 1,1 52,2 14,1 31,4 27,5 3950 1780 900 L42-041 4400 200 2,2 1,5 52,9 17,9 39,6 34,6 3950 1660 1140 L42-054 5800 200 3 2,2 50,9 22,8 52,2 42,6 4030 1780 1290 L42-065 7300 200 3 2,2 52,8 29,7 63,5 56,4 4210 1900 1440 L42-088 9300 200 4 3 53,0 38,0 84,4 71,3 4590 2260 1440 L42-110 11600 200 5,5 4 53,9 48,2 101 90,7 4830 2500 1560 L42-130 14500 200 7,5 5,5 53,7 60,0 127 113 5430 2980 1560 L42-160 17500 250 9,2 7,5 53,6 72,3 155 142 5610 2980 1810 L42-210 23000 250 11 9,2 52,1 92,4 206 193 5730 3220 2160 L42-260 27000 250 15 11 50,9 106 244 231 6010 3580 2280 L64-320 35000 300 18,5 15 50,3 136 315 297 6770 4500 2320 L64-410 43000 300 22 18,5 50,9 169 392 332 7390 4500 2770 L64-520 56000 300 30 30 50,4 218 512 451 7390 4740 3270 L64-640 70000 300 37 30 50,2 265 629 571 7390 4740 3920 L64-810 88000 300 2 x 22 2 x 18,5 50,7 345 398 338 7290 4500 5400 External air temperature -5 C bs - Room air temperature 20 C bs. Inlet air temperature 8 C bs ( >33 C) - water temperature inlet 80 C outlet 70 C Inlet air temperature 30 C bs 50% ru ( <16 C) - water temperature inlet 7 C outlet 12 C. 6
in galvanized steel inside and prepainted steel outside, insulating material. > G4 prefi lter on the side; centrifugal fan, three-phase electric motor and transmission with belt. > G4 prefi lter on the fresh air side; > Crossfl ow heat recovery with fresh air damper and exhaust air damper; > F7 rigid bag fi lter; > Cu-Al 8 row cooling coil; > Humidifier section with prearrangement for steam diffusers; > condensate drain tray; centrifugal fan, three-phase electric motor and transmission with belt; > H13 HEPA filter. efficiency power m 3 /h Pa kw % kw kw kw mm mm mm L42-016 1700 200 1,1 0,55 57,9 7,6 15,2 15,6 6160 1300 780 L42-022 2400 200 1,5 0,75 55,4 10,2 21,6 20,9 6400 1420 880 L42-026 2800 200 1,5 1,1 52,1 11,3 25,0 25,2 6500 1660 840 L42-033 3500 200 2,2 1,1 55,9 15,1 31,4 30,6 6840 1780 900 L42-041 4400 200 2,2 1,5 56,5 19,1 39,6 39 6840 1660 1140 L42-054 5800 200 3 2,2 54,6 24,4 52,2 53,2 7000 1780 1290 L42-065 7300 200 4 2,2 57,6 32,4 63,5 63,3 7260 1900 1440 L42-088 9300 200 5,5 3 53,1 38,0 84,4 80,6 7620 2260 1440 L42-110 11600 200 7,5 4 57,1 50,9 101 102 8000 2500 1560 L42-130 14500 200 7,5 7,5 53,2 59,5 127 128 8500 2980 1560 L42-160 17500 250 11 7,5 56,5 76,1 155 160 8860 2980 1810 L42-210 23000 250 15 11 54,7 96,9 206 216 9100 3220 2160 L42-260 27000 250 15 11 51,9 108 244 256 9460 3580 2280 L64-320 35000 300 22 15 51,1 138 315 331 10450 4500 2320 L64-410 43000 300 22 18,5 50,1 166 392 375 11050 4500 2770 L64-520 56000 300 30 22 52,4 226 512 507 11050 4740 3270 L64-640 70000 300 45 30 51,3 277 642 653 11050 4740 3920 L64-810 88000 300 2 x 22 2 x 18,5 52,7 357 796 764 11090 4500 5400 External air temperature -5 C bs - Room air temperature 20 C bs. Inlet air temperature 8 C bs ( >33 C) - water temperature inlet 80 C outlet 70 C Inlet air temperature 30 C bs 50% ru ( <14 C) - water temperature inlet 7 C outlet 12 C. Confi guration 7 > G4 prefi lter on the side; > G4 prefi lter on the fresh air side; > Thermal wheels heat recovery with fresh air damper, mixing damper and exhaust air damper; Confi guration 8 Airfl ow efficiency m 3 /h Pa kw % kw kw mm mm mm L42-016 2100 200 0,75 0,75 74,7 18,6 17,0 2360 1300 780 L42-022 2800 200 1,1 1,1 73,6 24,4 22,8 2430 1420 880 L42-026 3400 200 1,5 1,5 73,4 29,5 27,7 2480 1660 840 L42-033 4200 200 1,5 1,5 73,9 36,7 34,7 2650 1780 900 L42-041 5300 200 2,2 2,2 73,6 46,1 43,8 2650 1660 1140 L42-054 7000 200 3 3 73,4 60,7 57,8 2730 1780 1290 L42-065 8800 200 3 3 73,9 76,9 70,1 2910 1900 1440 L42-088 11000 200 4 4 73,7 95,7 88,1 3090 2260 1440 L42-110 14000 200 5,5 5,5 73,7 113 106 3230 2500 1560 L42-130 17500 200 5,5 5,5 73,3 138 132 3530 2980 1560 L42-160 21000 250 9,2 9,2 73,3 182 170 3710 2980 1810 L42-210 27000 250 9,2 9,2 76,8 245 223 3830 3220 2160 L42-260 33000 250 11 11 76,7 298 272 4110 3580 2280 L64-320 42000 300 15 15 77,1 382 347 4720 4500 2320 L64-410 52000 300 18,5 18,5 76,0 466 434 4840 4500 2770 L64-520 65000 300 22 22 76,1 583 552 4920 4740 3270 L64-640 80000 300 30 30 75,6 715 684 4920 4740 3920 L64-810 100000 300 2 x 18,5 2 x 18,5 75,7 849 407 4840 4500 5400 External air temperature -15 C bs - Room air temperature 20 C bs. Inlet air temperature 10 C bs ( >33 C) - water temperature inlet 80 C outlet 70 C 7
> G4 prefi lter on the side and on the fresh air side; > Thermal wheels heat recovery with fresh air damper and air damper; > F7 rigid bag fi lter; > Cu-Al 4 row cooling coil; efficiency power m 3 /h Pa kw % kw kw kw mm mm mm L42-016 1700 200 0,75 0,55 75,7 15,2 14,7 10,3 3300 1300 780 L42-022 2400 200 1,5 1,1 74,2 21,0 20,9 14,5 3300 1420 880 L42-026 2800 200 1,5 1,1 74,2 24,5 24,2 17,7 3300 1660 840 L42-033 3500 200 2,2 1,5 75,1 31,0 30,5 20,8 3300 1780 900 L42-041 4400 200 2,2 1,5 75,1 39,0 38,4 28,2 3500 1660 1140 L42-054 5800 200 3 2,2 74,2 50,9 50,6 34,6 3500 1780 1290 L42-065 7300 200 4 3 75,3 65,0 64,4 45,6 3700 1900 1440 L42-088 9300 200 5,5 4 73,9 81,2 81,7 58,0 3700 2260 1440 L42-110 11600 200 5,5 4 74,2 101 98,2 73,8 3800 2500 1560 L42-130 14500 200 7,5 5,5 73,9 126 123 92,3 4000 2980 1560 L42-160 17500 250 9,2 7,5 74,6 154 150 116 4000 2980 1810 L42-210 23000 250 15 11 73,3 199 199 132 4200 3220 2160 L42-260 27000 250 15 9,2 78,0 248 237 160 4400 3580 2280 L64-320 35000 300 18,5 15 78,6 324 305 206 5000 4500 2320 L64-410 43000 300 22 18,5 78,1 395 379 271 5000 4500 2770 L64-520 56000 300 30 22 77,0 509 497 368 5000 4740 3270 L64-640 70000 300 37 30 76,5 632 622 475 5000 4740 3920 L64-810 88000 300 2 x 22 2 x 18,5 76,1 789 772 548 5000 4500 5400 External air temperature -15 C bs - Room air temperature 20 C bs. Inlet air temperature 10 C bs ( >34 C) - water temperature inlet 80 C outlet 70 C Inlet air temperature 28 C bs 50% ru ( <16 C) - water temperature inlet 7 C outlet 12 C. Confi guration 9 > Fresh air damper and air damper; > G4 prefi lter + F7 bag fi lter on the side and on the fresh air side; > Thermal wheels heat recovery; > Cu-Al 4 row cooling coil; > Humidifi er section with prearrangement for steam diffusers; Confi guration 10 efficiency power m 3 /h Pa kw % kw kw kw mm mm mm L42-016 1700 200 1,1 0,75 75,7 15,2 14,7 10,3 4000 1300 780 L42-022 2400 200 1,5 1,1 74,2 21,0 20,9 14,5 4000 1420 880 L42-026 2800 200 1,5 1,1 74,2 24,5 24,2 17,7 4000 1660 840 L42-033 3500 200 2,2 1,5 75,1 31,0 30,5 20,8 4000 1780 900 L42-041 4400 200 2,2 2,2 75,1 39,0 38,4 28,2 4100 1660 1140 L42-054 5800 200 3 3 74,2 50,9 50,6 34,6 4200 1780 1290 L42-065 7300 200 4 3 75,3 65,0 64,4 45,6 4400 1900 1440 L42-088 9300 200 5,5 4 73,9 81,2 81,7 58,0 4400 2260 1440 L42-110 11600 200 7,5 5,5 74,2 101 98,2 73,8 4400 2500 1560 L42-130 14500 200 9,2 7,5 73,9 126 123 92,3 4800 2980 1560 L42-160 17500 250 9,2 7,5 74,6 154 150 116 4800 2980 1810 L42-210 23000 250 15 11 73,3 199 199 132 4800 3220 2160 L42-260 27000 250 15 11 78,0 248 237 160 5100 3580 2280 L64-320 35000 300 18,5 18,5 78,6 324 305 206 5300 4500 2320 L64-410 43000 300 22 18,5 78,1 395 379 271 5300 4500 2770 L64-520 56000 300 30 30 77,0 509 497 368 5500 4740 3270 L64-640 70000 300 37 30 76,5 632 770 475 5500 4740 3920 L64-810 88000 300 2 x 22 2 x 18,5 76,1 789 772 548 5500 4500 5400 External air temperature -15 C bs - Room air temperature 20 C bs. Inlet air temperature 10 C bs ( >34 C) - water temperature inlet 80 C outlet 70 C Inlet air temperature 28 C bs 50% ru ( <16 C) - water temperature inlet 7 C outlet 12 C. 8