A: Fetal pigs are a waste product or by-product of the meat packing industry, where animals are slaughtered and prepared for human consumption. Virginia Tech s fetal pigs come from Nebraska Scientific.
1 An electric water heater can cost $400-$3,000 or more for complete installation of a conventional storage-tank model and $1,800-$4,500 or more for a tankless model (including a 220V/240V outlet). 2  Electric water heaters typically cost less than gas units but are more expensive to operate.
Gas tankless water heaters, which use high-powered burners to quickly heat water as it runs through a heat exchanger, were 22 percent more energy efficient on average than the gas-fired storage-tank models in our tests. That translates into a savings of around $70 to $80 per year, based on 2008 national energy costs.hat can bring average installation costs to $1,200, compared with $300 for storage-tank models. Tankless units might need more care. During our long-term testing, an indicator on the tankless model warned of scale buildup. We paid $334 for special valves and a plumber to flush out the water heater with vinegar.