The heating load of a building at winter design conditions is 3 210 000 Btu/hr (with pick-up allowance). From the performance specifications for commercial oil-fired hot water boilers provided in Table 6.3, select a boiler that can efficiently meet this load based on the
a. MBH output rating
b. I = B = R net rating

Table 6.3

Transcribed Image Text:

MBH 420 560 660 770 840 990 1155 1320 1540 1925 2310 2695 3080 3465 3850 4235 4620 5005 5390 5775 6160 6545 6930 Input kW 1433 1911 2253 2628 2867 3379 3942 4505 5256 6570 7884 9198 10 512 11 826 13 140 14 454 15 768 17 082 18 396 19 710 21 024 22 338 23 652 MBH 338 454 532 612 676 798 918 1064 1224 1530 1836 2142 2448 2754 3060 3366 3672 3978 4284 4590 4896 5202 5508 Output kW 1154 1550 1816 2089 2307 2724 3133 3631 4178 5222 6266 7311 8355 9399 10 444 11 488 12 533 13 577 14 621 15 666 16 710 17 754 18 799 I=B=R Net Rating MBH kW 295 395 463 532 588 694 798 925 1064 1330 1596 1862 2129 2395 2661 2927 3193 3459 3725 3991 4257 4523 4790 1007 1348 1580 1816 2007 2369 2724 3157 3631 4539 5447 6355 7266 8174 9082 9990 10 898 11 806 12 713 13 621 14 529 15 437 16 348