Heart failure (HF) is the third most common reason for hospitalization in Canada, where, the direct health care costs of HF are $2.8 billion. HF affects 600,000 Canadians with median survival of only 1.5 years after diagnosis. HF patients stay longer at hospital. Even after discharge, 1 out of 5 of patients returns to the hospital within a month. The major complaint of HF patients is shortness of breath due to extra water in their body and lungs. Thus, monitoring of body water is an important challenge in HF, especially at home settings.