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<p>If you've noticed a drop in your <strong>boiler's effectiveness</strong>, maybe it's attributed to various factors that might be lurking inside your program. From issues like insufficient insulation to the effects of <solid> mineral build-up </solid>, your boiler's efficiency may be compromised more than you realize. But don't quit there; there are three even more <strong>essential reasons you need to uncover to ensure your boiler operates at its greatest. Stay tuned to uncover the remaining secrets behind your boiler's performance decline.</strong></p> <strong><h2>Essential insights</h2> <ul> <li>Inadequate insulation prospects to heat reduction.</li> <li>Mineral build-up reduces heat transfer efficiency.</li> <li>Faulty thermostat calibration causes excessive boiler operation.</li> <li>Air flow leaks disrupt combustion, decreasing e