BK Commercial Condensing Boilers - cost-effective and efficient

Burning diesel oil, kerosene, natural gas or LPG


  • Low cost
  • Year-round condensing
  • Counterflow heat transfer
  • Sulphur content in oil removed by neutraliser
  • Flue gas outlet temperature less than 48°C
  • Boiler efficiency exceeds 92% GCV throughout the year



Performance

ModelBK50BK70BK100BK250
Maximum output4970 120250
Minimum output3350 71130
Maximum flow temperature8080 8080
Oil Full load efficiency %GCV95.394.7 93.295
Oil Part load efficiency %GCV 97.897.0 97.897
Fuel used Oil ltrs/Hr5.47.7 13.233
Fuel used Gas m3/Hr4.97.0 12.030
Exit flue gas @ 40°C Oil ltrs/Hr67.496.2 165412
Exit flue gas @ 40°C Gas m3/Hr73.5104.9 180550
Dry weight kg384384 6281490
Water contents litres110110 200480
Min. water pressure BARS 0.60.6 0.61.2
Standard water pressure3.03.0 4.04.0

Dimensions

ModelBK50BK70BK100BK250
Height mm14741474 16322011
Width mm632632 8421179
Depth mm12331233 14583335
Height (required for passageway)10691069 11222100
Width (required for passageway)585585777950
Depth (required for passageway)1111111114581807
Access front700700 7001000
Access one side600600 600500
Access other side200200 200500
Access rear500500 5001200
Access top350350 350350

Connections

ModelBK50BK70BK100BK250
Fresh air inlet (balanced) mm125125 160125
Flue gas outlet mm8080 110160
Heating flow mm3232 5080
Heating return mm3232 3280
Condensate mm40404040