Condensing vs Standard Boilers: Illinois Savings

For homeowners in Illinois weighing a boiler replacement, the choice often comes down to one question: will a condensing boiler save enough to justify the higher upfront cost? In many cases, the answer is yes—especially when replacing an older, less efficient “standard” (non-condensing) unit.

Both systems can heat your home, but they do it differently. A standard boiler primarily delivers heat that’s generated during fuel combustion, then vents the remaining heat up the chimney. A condensing boiler is designed to capture additional heat by condensing water vapor in the exhaust, improving overall efficiency.