Cast Iron Boilers are typically non condensing, atmospheric combustion that is chimney vented. Can be used with Natural Gas, LP Gas and Oil: efficiency ranges from 85-87%
Cast Iron Boilers
These condensing modulating boilers are similar in design to the heat only boilers but offer space heating and hot water all in one box. Backed by the industries largest rebates, and cost savings by eliminated gas piping and venting of an additional water heater.
Condensing, Modulating Boilers are commonly more compact, lightweight and space saving than traditional cast iron boilers. Commonly made out of stainless steel and achieve efficiency rating of 95-96% AFUE. Condensing boilers are ideal for natural gas or propane and can be direct vented; no chimney required.