I just googled condensing oil boilers and saw a few. I did not research
them closely, a system 2000 is up to 87%, HW boilers definatly go to
98-99% with 96% being easily found, Steam is another issue altogether.
Operating temp vs efficiency on modulating boilers varies max
efficiency, being at lower water temps on some units. Point is there
are alot of ways to save, and my several boiler guys always recommend
whats easy for them and what they sell, not what I want or need, Today
and the future supply of Ng are going to to stay tight with high prices
since no real new drilling is going on, Soon we will be importing more
LNG because of dam invironmentalists blocking drilling we all are paying
out the ass. Anwar is the lastest loss to large reserves, and Im never
going there to see it, its to dam cold there. These high and higher Ng
prices are here to stay.