Fluid Restriction in Heart Failure Versus Liberal Fluid Uptake

Inclusion Criteria: * Diagnosis of chronic HF with NYHA class II/III according to the prevailing guidelines \> 6 months prior to randomization (1) * Adult (age ≥ 18 years) Exclusion Criteria: * Reversible cause of HF (thyroid disorders, severe anemia, vitamin deficiencies) * Hospital admission for HF within 3 months of randomization * Chronic HF with NYHA class IV * Hyponatremia at baseline (sodium \<130mmol/l) * Changes in HF medical therapy in last 14 days prior to randomization * Estimated Glomerular Filtration Rate (eGFR) of \< 30ml/min/1.73 m2 at baseline * Scheduled cardiac surgery within 3 months of randomization * Recent (within 3 months) coronary intervention (PCI or CABG) or implantation of pacemaker device * Comorbidity for which fluid restriction is advised by a different treating physician (e.g. nephrologist) * Comorbidity with a life expectancy of less than 6 months * The treating clinician believes that participation in the domain would not be in the best interests of the patient * Inability to provide informed consent