HVAC is not exempt from the energy crunch. Efficiency mandates and lower utility bills are just the beginning of environmental and end user demands. To remain competitive, inventive HVAC units are being successfully marketed.
The Energy Information Administration's "2004 Renewable Energy Trends" report showed that 70 percent of renewable energy was consumed for electricity generation, leaving 30 percent for nonelectrical purposes. It also showed that biomass consumption has increased by 4 percent or 105 trillion Btu in 2004 with wood energy leading the way.