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.
If both types are used at the same time, they're called a biventricular assist device (BIVAD). The LVAD is the most common type of VAD. It helps the left ventricle pump blood to the aorta. The aorta is the main artery that carries oxygen-rich blood from your heart to your body. RVADs usually are used only for short-term support of the right ventricle after LVAD surgery or other heart surgery.