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.
PVD is peripheral vascular disease ...could result from any number of things. PAD is peripheral arterial disease and both have very different signs and symptoms. A DVT is a deep vein thrombosis....very different. Sep 18, '12.