http://www.spiraxsarco.com/resource...er-house/boiler-efficiency-and-combustion.asp
Have a look at the gas table on this website. It give caalorific values at NTP. Can anyone explain what NTP is for each gas propane ,butane and NG. is it 28,37,20 mBar or is it the pressure/temp of athmosphere.??Thanks Mike
Have a look at the gas table on this website. It give caalorific values at NTP. Can anyone explain what NTP is for each gas propane ,butane and NG. is it 28,37,20 mBar or is it the pressure/temp of athmosphere.??Thanks Mike