If you made energy efficiency improvements to your home in 2014, you may be eligible for a substantial tax credit. Here are the six areas for which tax credits have been made available:
- Biomass stoves (this would mainly be wood or wood pellets, though there are some other, less common kinds)
- Upgrading to a more efficient heating or cooling device (a more efficient boiler, a heat pump, etc.)
- Improving efficiency of your roof
- Non-solar water heater
- Sealing/improving windows and doors
Full information is available on the Energy Star site, here.