Tankless water heaters that use natural gas are about 23 percent more efficient than a traditional storage version, which is about 60 percent efficient, according to the Department of Energy. Most gas-powered tankless water heaters do qualify for a $300 federal tax rebate. Many states offer similar incentives.
An LVAD is a mechanical device that helps people when their heart is too weak to pump blood. An LVAD doesnât replace the heart. It assists the heart in pumping oxygen-rich blood throughout the body so that the organs and muscles can function properly. The LVAD system has parts that work inside and outside the body. Inside, a heart pump is attached to the left side of the heart. Outside, a controller, batteries, and driveline help to power and control the heart pump.
A ventricular assist device (VAD) â also known as a mechanical circulatory support device â is an implantable mechanical pump that helps pump blood from the lower chambers of your heart (the ventricles) to the rest of your body. A VAD is used in people who have weakened hearts or heart failure. Although a VAD can be placed in the left, right or both ventricles of your heart, it is most frequently used in the left ventricle. When placed in the left ventricle it is called a left ventricular assist device (LVAD). You may have a VAD implanted while you wait for a heart transplant or for your heart to become strong enough to effectively pump blood on its own.