Gas-Fired Steam Boilers

Products   Energy Efficiency (AFUE) Price
GSB8-E Boiler   up to 82.7  $
Standard efficiency, gas-fired steam boiler 

Gas-Fired Water Boilers

ESTAR ICON ENERGY STAR® Product   Energy Efficiency (AFUE) Price
ESTAR ICON GCWB95 Boiler   up to 95  $$$
High efficiency, modulating gas-fired condensing combination water boiler 
ESTAR ICON GWB9-IH Boiler   90  $$$
High efficiency, gas-fired condensing water boiler 
GWB84-IE Boiler   up to 84.4  $$
Standard efficiency, gas-fired water boiler, with chimney or side wall venting 
GWB84-E Boiler   84  $
Standard efficiency, gas-fired water boiler with chimney venting 

Oil-Fired Water Boilers

Products   Energy Efficiency (AFUE) Price
OWB86 Boiler   86  $$
Standard efficiency, oil-fired water boiler