Blowdown rate (%) = (feedwater conductivity − condensate conductivity) ÷ (boiler conductivity − condensate conductivity) × 100
Water savings = difference in blowdown rates × steam production × operating hours, at 8.34 lbs/gal
Fuel savings = pounds of blowdown avoided × (steam temperature − feedwater temperature) × 1 Btu/lb·°F, at your gas rate
Sewer and chemical savings = gallons avoided × your sewer rate, and per-1,000-gallon treatment cost
Simplified steam tables (steam temperature ≈ 338°F + 0.3 × psig). Request the specialist review above for an estimate using ASME steam tables and actual enthalpies.