How to deminish fluid in the lungs due to congestive heart failure?

Why do you have CHF? The answer in part requires your health care provider to determine why you have congestive heart failure and ruling out other possible causes for the fluid, and what other conditions you may have. Among the many important issues: do you have high blood pressure? Any lung disease? Kidney disease? A history of a past heart attack? What's your age? Has treatment been tried before? Did it work?
Diuretics. The most common method is diuretic such as lasix, (furosemide) bumex, or spironolactone. Sodium restriction and rarely dialysis.