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.
biventricular assist device (BVAD) a ventricular assist device with the combined functions of both left and right ventricular assist devices. contraceptive device one used to prevent conception, such as a barrier contraceptive, an intrauterine device, or a means of preventing ovulation (e.g., birth control pill). intrauterine device (IUD) a plastic or metallic device inserted in the uterus to prevent pregnancy.