Boiler Efficiency & Fuel

Are you burning more fuel than you should? High stack loss means wasted money and excess emissions. This calculator shows exactly what your boiler costs to run and where efficiency is lost. Enter boiler output in HP or MBH, fuel type (natural gas, propane, fuel oil, coal), fuel cost, and thermal efficiency. Calculates input BTU per hour, fuel consumption rate, annual fuel usage, annual operating cost, and stack loss percentage. FUEL TYPES SUPPORTED: - Natural gas (100,000 BTU/therm) - Propane (91,500 BTU/gal) - Fuel oil #2 (140,000 BTU/gal) - Coal (12,000 BTU/lb) KEY FEATURES: - Annual operating cost projection - Stack loss percentage - Fuel consumption rate - Works completely offline - No account or login required Built for boiler operators, facility managers, and HVAC engineers.