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7

Temperature Options

Spark-Resistant Construction Options

 

The following AMCA Standards apply to fan 
applications that may involve the handling of 
potentially explosive or flammable particles,  
fumes or vapors.

• 

AMCA Type A 

- All parts in contact with the 

airstream are constructed of nonferrous material 
(aluminum). Model SWB does not meet AMCA 
Type A spark resistant construction because the 
fan shaft is steel.

• 

AMCA Type B

 - The fan wheel is constructed 

of nonferrous material (aluminum). A nonferrous 
(aluminum) rub ring surrounds the fan shaft where 

  it passes through the fan housing. Available on all 

SWB sizes with an aluminum wheel and rub ring.

• 

AMCA Type C

 - The inlet cone is constructed 

of nonferrous material (aluminum). A nonferrous 
(aluminum) rub ring surrounds the fan shaft where it 
passes through the fan housing.

The constructions listed minimize the potential of 
ferrous components making contact with each other 
that may produce sparks. However, they do not 
guarantee against the potential of producing sparks. 
The installer must electrically ground all fan and 
system components.

Testing

 

High temperature testing was conducted at 
Greenheck’s Research and Development facility 
with airstream temperatures in excess of 1000°F 

(538°C)

. Temperatures were monitored at the 

following critical locations throughout the tests: 
bearings, bearing compartment, motor, motor 
compartment, airstream and fan housing.

Operating Temperatures

 

Utility set fans are suitable for applications with 
elevated temperature airstreams. Refer to the 
chart at the right for operation temperature 
guidelines and optional accessories.

High Temperature/Emergency Smoke Control

 

The SWB Series 200 sizes 212 to 224 and 
Series 300 may be equipped for emergency 
smoke removal applications by specifying a 
high temperature option. The table below right 
indicates the construction features included in 
the high temperature options enabling exhaust of 
heat and smoke at 500°F 

(260°C)

 for a minimum 

of 4 hours or 1000°F 

(538°C)

 for a minimum of 

15 minutes.

High Temperature Option SWB Series 200 & 300

• 500°F 

(260°C)

 for a minimum of 4 hours

• 1000°F 

(538°C)

 for a minimum of 15 minutes

Temperature ratings tested in accordance to UL 
smoke control systems.

Emergency Smoke Control - UL Listed  
SWB Series 200 & 300

• 500°F 

(260°C)

 for a minimum of 4 hours

• 572°F 

(300°C)

 for a minimum of 2 hours

• 752°F 

(400°C)

 for a minimum of 2 hours

• 1000°F 

(538°C)

 for a minimum of 15 minutes

High Temperature SWB Features 

Series 200 & 300

High 

Temperature 

Option

High 

Temperature 

Option with UL

Steel Construction

9

9

Shaft Seal

9

9

Heat Slinger

9

9

Weatherhood

9

UL Label (Power ventilators for 
smoke control systems)

9

Testing for Emergency Smoke Temperature and Time Guidelines

Code

Class

Tested Temperature

Time 

(Hours)

IRI

500°F  

(260°C)

4.00

SBCCI

1000°F  

(538°C)

0.25

BSI

Class A

302°F  

(150°C)

5.00

Class B

482°F  

(250°C)

2.00

Class C

572°F 

 (300°C)

0.50

Class D

572°F  

(300°C)

1.00

Class E

752°F  

(400°C)

2.00

Operating 

Temperatures  

and Construction

SWB 

Series  

100

SWB 

Series  

200

SWB 

Series 

300

SFD, SFB

Galvanized

Painted 

Steel

Aluminum 

Airstream

Steel

SFD

SFB

-20° to 200°F 

(-29° to 93°C)

 

Standard

9

9

9

9

9

9

201° to 300°F 

(94° to 149°C)

 

Heat Slinger/Shaft Seal

9

9

9

9

301° to 400°F 

(149° to 204°C)

 

Heat Slinger/Shaft Seal

9

9

The maximum continuous operating temperature on the SWB is 400°F. 
For continuous operating temperatures between 401° and 1000°F use an 
Arrangement 1, 9 or 10, backward-inclined centrifugal fan model BISW.

Содержание SFB

Страница 1: ...Centrifugal Utility Fans Model SFD SFB and SWB Direct and Belt Drive November 2011...

Страница 2: ...e ratings shown are based on tests and procedures performed in accordance with AMCA Publication 211 and AMCA Publication 311 and comply with the requirements of the AMCA Certi ed Ratings Program The c...

Страница 3: ...een designed for supply exhaust and return air applications requiring low to medium air volumes and pressures You will receive the following benefits with these fans SFD fans are available in four siz...

Страница 4: ...Supports Housing supports are constructed of heavy gauge steel with formed flanges for extra strength 9 9 9 9 9 5 Mounting Holes Base rails have prepunched mounting holes which allow for easy installa...

Страница 5: ...5 Standard Construction Features SWB 300 Series SWB 100 Series 13 12 11 10 8 7 6 5 4 3 2 SFD SFB and SWB 200 Series 13 13 12 11 10 8 8 7 6 5 5 4 3 3 2 1 13 11 6 4 3 2 8 7 10 12 5...

Страница 6: ...ee during a seismic event Subjecting Greenheck models SWB SFD and SFB fans to this type of testing ensures the fans will operate without problems after a seismic event OSP 0113 10 SWB Series 100 and 2...

Страница 7: ...ature Emergency Smoke Control The SWB Series 200 sizes 212 to 224 and Series 300 may be equipped for emergency smoke removal applications by specifying a high temperature option The table below right...

Страница 8: ...Lubrication lines with grease fittings are extended from shaft bearings to the base of the drive frame panel or weatherhood for easy bearing lubrication Inlet and Outlet Guards Constructed of expande...

Страница 9: ...vertical and horizontal motion restraint Restrained spring isolators can be used for blocking during equipment installation and are provided with leveling bolts Springs provide 50 overload capacity a...

Страница 10: ...r static pressures 2 Forward curved wheels typically have lower performance capabilities compared to the backward inclined and contain Overloading type wheel meaning that changes in performance can re...

Страница 11: ...der elevated temperature conditions Due to high temperatures and grease laden airstreams in commercial kitchen ventilation system designers must be aware of governing codes and guidelines The National...

Страница 12: ...7 93 4 248 SFB 15 211 16 68 179 16 446 1113 16 300 915 16 252 1311 16 348 1211 16 322 107 8 276 163 4 426 145 8 371 105 8 270 SFB 18 41 16 103 233 8 594 1513 16 402 131 4 337 185 16 465 171 8 435 145...

Страница 13: ...248 213 211 16 68 175 8 448 113 4 298 97 8 251 135 8 346 123 4 324 107 8 276 165 8 422 145 8 371 105 8 270 215 31 8 79 191 2 495 131 16 332 11 279 151 8 384 141 8 359 121 8 308 181 2 470 161 4 413 11...

Страница 14: ...op Angular Downblast DB Downblast BAD Backward Angular Downblast BH Backward Horizontal BAU Backward Angular Upblast Wheel Rotation CW Clockwise CCW Counterclockwise Series SWB Only 100 Galvanized Con...

Страница 15: ...3 11 7 10 5 SFD 7 5 6B 1 6 1140 CFM 672 612 549 467 BHP 0 16 0 14 0 13 0 10 Sones 10 6 9 8 9 4 8 6 SFD 7 5 5A 1 2 1725 CFM 1062 1028 988 949 869 775 636 BHP 0 59 0 56 0 53 0 50 0 46 0 38 0 30 Sones 20...

Страница 16: ...334 RPM 1059 1174 1306 1426 1534 1644 1745 1837 1923 BHP 0 30 0 35 0 42 0 49 0 55 0 63 0 71 0 78 0 86 Sones 12 0 12 2 12 6 13 2 14 3 15 8 17 5 19 1 21 1260 2775 RPM 1216 1318 1417 1528 1631 1728 1818...

Страница 17: ...3 12 0 13 3 14 7 1550 2199 RPM 828 946 1049 1142 1229 1309 1383 1456 1531 1603 BHP 0 37 0 46 0 54 0 63 0 73 0 81 0 89 0 97 1 02 1 17 Sones 11 1 11 0 11 3 11 6 12 0 13 0 14 2 15 5 17 0 18 7 1740 2469 R...

Страница 18: ...4 4 16 0 2025 2367 RPM 686 789 883 969 1045 1116 1185 1251 1313 1373 BHP 0 49 0 61 0 74 0 85 0 96 1 07 1 19 1 32 1 44 1 56 Sones 11 0 11 4 11 8 12 2 12 7 14 0 15 5 17 0 18 6 20 2265 2647 RPM 747 837 9...

Страница 19: ...BHP 0 72 0 89 1 07 1 24 1 41 1 57 1 74 1 90 Sones 12 7 13 5 13 2 13 5 14 6 16 0 17 5 19 0 3360 2424 RPM 585 668 742 810 871 928 980 1031 1128 1174 BHP 0 91 1 11 1 29 1 49 1 68 1 87 2 04 2 22 2 58 2 7...

Страница 20: ...17 8 19 7 21 23 4850 2115 RPM 503 573 638 698 756 809 861 910 957 1001 BHP 1 09 1 34 1 59 1 85 2 12 2 38 2 68 2 97 3 26 3 54 Sones 15 5 15 8 14 8 14 8 16 2 18 1 20 22 24 25 5275 2300 RPM 534 601 662...

Страница 21: ...5900 2455 RPM 454 511 564 614 661 704 747 788 BHP 1 52 1 80 2 08 2 38 2 68 2 98 3 30 3 64 Sones 16 1 16 8 15 5 15 3 15 5 17 3 19 0 21 6425 2673 RPM 484 537 587 634 679 722 762 801 877 911 BHP 1 90 2 2...

Страница 22: ...441 491 540 582 620 691 755 BHP 1 60 1 91 2 25 2 61 2 95 3 26 3 92 4 56 Sones 17 2 19 3 20 22 23 24 26 29 7800 2418 RPM 428 475 520 564 608 646 713 776 834 861 BHP 2 25 2 61 2 98 3 37 3 79 4 17 4 88 5...

Страница 23: ...32 4 83 5 76 6 81 Sones 16 1 18 0 19 6 21 22 23 26 29 10750 2554 RPM 349 391 432 471 508 542 605 660 716 743 BHP 3 07 3 58 4 12 4 65 5 19 5 70 6 79 7 78 8 96 9 57 Sones 18 4 20 21 23 24 25 27 30 33 35...

Страница 24: ...83 BHP 3 85 4 46 5 09 5 73 6 41 7 09 8 45 9 86 11 28 12 04 Sones 19 8 22 23 24 25 27 29 32 35 37 14350 2886 RPM 349 382 415 447 478 508 566 618 668 691 BHP 4 83 5 47 6 16 6 83 7 57 8 30 9 80 11 22 12...

Страница 25: ...4 38 40 16100 2816 RPM 342 375 406 437 466 492 539 586 629 649 BHP 5 42 6 18 6 96 7 84 8 69 9 49 11 02 12 74 14 38 15 20 Sones 25 26 28 30 32 33 35 37 40 42 17625 3082 RPM 369 399 428 456 484 510 557...

Страница 26: ...RPM 1550 1681 1830 1993 2155 2318 2470 2614 2751 2880 BHP 0 07 0 09 0 12 0 15 0 19 0 24 0 29 0 34 0 39 0 45 Sones 8 0 9 0 10 2 11 8 13 2 14 5 15 9 17 4 18 8 20 300 395 RPM 1749 1866 1976 2113 2253 239...

Страница 27: ...14 2 15 6 17 0 380 500 RPM 1573 1713 1840 1970 2105 2244 2375 2502 2627 2745 BHP 0 09 0 11 0 14 0 18 0 21 0 25 0 30 0 34 0 39 0 44 Sones 8 6 8 9 9 7 10 7 11 6 12 6 13 7 14 9 16 3 17 6 440 579 RPM 1782...

Страница 28: ...9 2 9 8 10 5 11 1 12 0 12 9 13 9 14 8 600 789 RPM 1504 1673 1825 1965 2105 2234 2356 2471 2579 2681 BHP 0 09 0 14 0 18 0 22 0 27 0 32 0 38 0 44 0 50 0 57 Sones 9 1 9 8 10 5 11 2 11 8 12 3 13 0 13 7 1...

Страница 29: ...2 6 13 1 14 0 15 3 16 7 1100 1447 RPM 1519 1653 1776 1888 1991 2088 2179 2267 2349 2433 BHP 0 18 0 24 0 30 0 36 0 42 0 48 0 54 0 61 0 67 0 75 Sones 12 0 12 7 13 0 13 4 13 9 14 4 15 0 16 1 17 3 18 6 12...

Страница 30: ...5 0 63 0 72 0 81 0 91 1 00 1 09 Sones 11 9 12 7 13 3 13 9 14 7 15 5 16 2 16 7 17 2 17 8 1900 1845 RPM 1569 1659 1745 1828 1907 1984 2057 2126 2194 2261 BHP 0 39 0 48 0 57 0 66 0 76 0 86 0 96 1 06 1 16...

Страница 31: ...1 02 1 13 1 24 Sones 11 1 11 7 12 4 13 0 13 6 14 1 14 7 15 3 16 1 17 1 2250 1800 RPM 1319 1412 1496 1578 1654 1724 1791 1854 1915 1972 BHP 0 42 0 53 0 63 0 75 0 86 0 98 1 09 1 21 1 32 1 44 Sones 12 8...

Страница 32: ...BHP 0 57 0 69 0 82 0 96 1 09 1 36 1 64 1 79 1 93 2 23 Sones 13 5 13 8 14 1 14 6 15 1 15 9 17 4 18 4 19 5 22 3000 1974 RPM 1306 1369 1429 1490 1548 1659 1761 1808 1853 1940 BHP 0 76 0 89 1 03 1 18 1 3...

Страница 33: ...ones 10 9 11 7 12 5 13 2 13 9 14 8 16 3 17 0 16 8 3500 1872 RPM 997 1070 1135 1191 1247 1301 1352 1407 1461 1513 BHP 0 62 0 78 0 95 1 11 1 27 1 43 1 60 1 79 1 99 2 19 Sones 13 1 14 1 14 6 15 2 15 8 17...

Страница 34: ...0 79 0 98 1 17 1 37 1 58 1 80 2 02 2 24 Sones 9 0 10 0 10 9 11 6 12 4 13 0 13 7 14 9 16 4 18 0 4050 1816 RPM 791 873 937 999 1057 1113 1169 1223 1276 1326 BHP 0 59 0 79 0 97 1 17 1 38 1 59 1 82 2 05...

Страница 35: ...5 1 5 1 75 2 2 25 2 5 2800 824 RPM 413 BHP 0 19 Sones 4 9 3400 1000 RPM 464 541 BHP 0 27 0 43 Sones 6 0 6 9 4000 1176 RPM 517 588 651 BHP 0 38 0 56 0 74 Sones 7 5 8 3 9 2 4600 1353 RPM 572 638 696 751...

Страница 36: ...19 7 21 23 24 270 429 RPM 1693 1975 2289 2429 2566 2825 2945 3059 3277 BHP 0 10 0 16 0 25 0 29 0 35 0 45 0 51 0 57 0 68 Sones 9 0 11 8 14 2 15 3 16 7 19 4 20 22 24 320 508 RPM 1921 2138 2395 2529 2659...

Страница 37: ...91 1 03 1 16 Sones 12 6 15 0 16 5 17 9 19 5 21 23 24 25 26 600 952 RPM 2007 2195 2404 2574 2725 2878 3021 3158 3295 BHP 0 26 0 35 0 47 0 57 0 68 0 80 0 92 1 04 1 17 Sones 16 0 17 1 18 9 21 22 24 25 26...

Страница 38: ...7 0 57 0 68 0 79 0 90 1 01 Sones 11 2 12 4 12 9 13 8 14 8 17 8 19 9 22 22 23 850 1349 RPM 2076 2189 2298 2505 2693 2871 3039 3196 3348 BHP 0 24 0 29 0 34 0 45 0 57 0 69 0 81 0 93 1 06 Sones 13 5 14 1...

Страница 39: ...3 15 2 15 9 16 7 17 6 18 8 20 21 1500 2381 RPM 2054 2214 2381 2528 2676 2815 2964 3103 3235 BHP 0 43 0 57 0 72 0 87 1 03 1 20 1 37 1 55 1 73 Sones 14 0 15 1 16 0 16 6 17 3 18 1 18 8 19 6 21 1675 2659...

Страница 40: ...s 10 5 11 7 13 2 14 9 16 0 17 2 18 5 19 8 21 23 1600 1882 RPM 1732 1905 2080 2233 2404 2564 2712 2851 2995 3135 BHP 0 36 0 51 0 67 0 84 1 02 1 21 1 41 1 62 1 83 2 05 Sones 12 8 14 0 15 7 16 5 17 4 18...

Страница 41: ...6 2730 BHP 0 51 0 59 0 69 0 87 1 08 1 29 1 52 1 77 2 03 2 31 Sones 13 7 14 2 15 0 16 3 17 1 17 9 18 8 19 8 21 23 2400 2330 RPM 1807 1874 1938 2063 2184 2307 2423 2543 2665 2790 BHP 0 68 0 78 0 88 1 09...

Страница 42: ...6 17 9 19 3 2600 2080 RPM 1458 1525 1591 1715 1840 1958 2083 2213 2333 2456 BHP 0 62 0 72 0 84 1 07 1 32 1 58 1 86 2 17 2 48 2 83 Sones 13 8 14 3 15 0 16 3 17 2 18 0 19 0 20 21 23 2950 2360 RPM 1620 1...

Страница 43: ...2 1 20 1 52 1 85 2 20 2 57 2 94 3 33 Sones 12 2 12 7 13 3 14 7 15 7 16 6 17 6 18 9 20 21 3450 2270 RPM 1410 1462 1520 1626 1734 1841 1949 2050 2162 2267 BHP 0 90 1 04 1 20 1 51 1 84 2 20 2 57 2 96 3 3...

Страница 44: ...13 6 14 2 15 2 16 8 19 1 22 25 27 29 31 4000 2139 RPM 1218 1322 1423 1525 1626 1727 1828 1927 2020 2108 BHP 0 97 1 32 1 68 2 07 2 51 2 95 3 43 3 93 4 44 4 96 Sones 15 7 16 4 17 3 18 7 21 23 25 27 29 3...

Страница 45: ...2063 RPM 1072 1171 1267 1364 1461 1556 1658 1754 1845 1888 BHP 1 06 1 46 1 88 2 35 2 85 3 38 3 98 4 60 5 23 5 55 Sones 15 2 15 8 16 8 18 4 21 23 26 28 31 32 5250 2354 RPM 1198 1285 1370 1454 1539 1624...

Страница 46: ...27 29 32 35 5500 2007 RPM 976 1065 1158 1249 1339 1432 1518 1598 1674 1746 BHP 1 18 1 64 2 14 2 70 3 30 3 91 4 54 5 18 5 84 6 51 Sones 15 8 16 5 17 5 19 5 22 25 27 30 32 35 6250 2281 RPM 1085 1164 124...

Страница 47: ...4 936 1015 1093 1171 1251 1329 1411 1487 BHP 1 36 1 64 1 92 2 49 3 11 3 77 4 49 5 24 6 10 6 98 Sones 14 5 15 2 15 8 17 0 18 2 20 23 25 27 29 7500 2206 RPM 946 982 1020 1093 1162 1230 1300 1369 1438 15...

Страница 48: ...6 4 96 5 67 6 40 Sones LwiA 12 9 76 14 77 15 2 79 16 6 80 18 2 82 19 9 83 22 85 24 86 26 88 7700 1837 RPM 731 815 900 971 1037 1098 1157 1215 1270 1322 BHP 1 53 2 17 2 83 3 50 4 19 4 91 5 65 6 43 7 22...

Страница 49: ...BHP 2 28 3 03 3 82 4 62 5 45 6 29 7 12 7 94 8 79 9 66 Sones LwiA 18 3 81 19 2 82 19 3 83 19 7 83 20 84 21 84 22 85 23 85 23 86 24 87 10200 2434 RPM 1013 1075 1134 1190 1243 1294 1343 1388 1429 BHP 2...

Страница 50: ...HP 1 67 2 43 3 21 4 00 4 82 5 68 6 58 7 50 8 44 9 40 Sones LwiA 15 1 79 16 80 17 5 81 18 7 82 19 9 83 21 84 23 86 25 87 27 88 29 90 10000 1934 RPM 686 755 831 894 953 1007 1057 1109 1158 1204 BHP 2 12...

Страница 51: ...19 BHP 1 79 2 58 3 40 4 24 5 08 5 93 6 81 7 72 Sones LwiA 14 1 78 15 3 79 16 6 80 18 81 19 5 83 21 84 21 84 22 85 10400 2011 RPM 775 840 900 957 1010 1056 1103 1150 1195 1238 BHP 2 14 2 97 3 85 4 75 5...

Страница 52: ...11 867 919 968 1018 1068 BHP 1 81 2 68 3 57 4 49 5 43 6 47 7 55 8 65 9 83 11 1 Sones LwiA 14 1 77 15 3 78 16 8 80 18 81 19 2 82 21 83 22 85 25 86 28 88 31 90 12000 1916 RPM 606 666 733 794 849 901 950...

Страница 53: ...51 805 858 909 956 1003 BHP 1 84 2 75 3 67 4 62 5 61 6 62 7 63 8 55 Sones LwiA 16 5 79 17 8 81 19 2 82 21 83 25 84 31 86 31 87 31 89 12000 1916 RPM 674 734 789 841 890 938 985 1029 1072 BHP 2 21 3 20...

Страница 54: ...11 BHP 1 77 2 74 3 73 4 76 5 91 7 09 8 34 9 70 11 1 Sones LwiA 13 7 76 14 6 78 16 1 79 17 8 81 19 3 82 21 83 23 85 26 87 30 89 13500 1762 RPM 513 575 638 694 745 794 841 885 926 970 BHP 2 46 3 56 4 72...

Страница 55: ...82 22 83 25 85 28 86 30 87 14000 1827 RPM 586 642 693 742 788 833 876 917 BHP 2 44 3 61 4 77 5 96 7 20 8 48 9 79 11 0 Sones LwiA 18 81 19 6 82 21 83 23 84 26 85 30 87 34 88 34 89 15000 1958 RPM 620 67...

Страница 56: ...75 625 670 712 754 793 829 BHP 2 95 4 25 5 60 6 95 8 34 9 76 11 3 12 9 14 5 Sones LwiA 15 2 77 16 7 78 17 8 80 19 4 81 21 83 22 84 23 84 24 85 26 86 17750 1906 RPM 506 555 603 652 697 738 776 813 850...

Страница 57: ...1 3 12 8 Sones LwiA 15 6 77 16 5 78 17 9 79 19 3 80 19 7 81 20 81 21 82 21 83 18000 1933 RPM 557 602 647 689 730 767 806 842 876 BHP 3 60 5 02 6 48 7 95 9 50 11 1 12 6 14 2 15 8 Sones LwiA 17 6 79 18...

Страница 58: ...95 6 54 8 15 9 81 11 6 13 4 15 3 17 2 Sones LwiA 14 9 76 17 1 78 18 7 80 19 4 81 21 82 23 84 24 85 25 86 27 87 21000 1843 RPM 446 492 537 582 622 659 694 730 763 794 BHP 4 23 5 89 7 67 9 42 11 2 13 1...

Страница 59: ...1668 RPM 447 494 539 581 621 659 694 BHP 3 20 4 74 6 29 7 93 9 57 11 2 12 9 Sones LwiA 14 3 76 15 8 77 17 2 78 18 6 79 19 9 81 21 82 22 82 21000 1843 RPM 485 528 570 609 646 682 717 750 BHP 3 97 5 64...

Страница 60: ...25000 1811 RPM 399 442 483 524 561 595 628 660 690 718 BHP 4 92 6 92 9 03 11 1 13 3 15 5 17 7 20 2 22 6 25 2 Sones LwiA 17 6 79 19 7 80 22 82 23 83 23 84 25 85 26 86 28 87 29 88 31 89 27500 1992 RPM 4...

Страница 61: ...000 1739 RPM 419 461 501 537 572 607 639 BHP 4 24 6 18 8 11 10 2 12 3 14 3 16 4 Sones LwiA 15 6 77 17 78 18 9 80 20 81 21 82 23 83 24 84 26000 1884 RPM 448 486 524 559 592 624 656 686 714 BHP 5 04 7 1...

Страница 62: ...gement 10 with a single width single inlet housing in clockwise or counterclockwise rotation as specified The housing shall be constructed of heavy gauge steel with airtight lock formed seams The hous...

Страница 63: ...zes 206 210 and all Series 100 fans Series 200 and 300 wheels shall be constructed of heavy gauge steel with optional aluminum on Series 200 fans size 212 and larger and all Series 300 sizes Series 30...

Страница 64: ...ovative air related equipment We offer extra value to contractors by providing easy to install competitively priced reliable products that arrive on time And building owners and occupants value the en...

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