Window Insulators UV Films during summer Films that reflect UV light during summer, making the house cooler Interior plastic films for winter Variety of options for insulating materials Reusable materials can be used (bubble wrap)
High-Efficiency Furnace Modern furnaces only 80% minimum efficiency Very important for older houses with poor insulation Possible to install return ducts in attics
Adding Insulation Adding insulation not terribly effective Only worth it if insulation is non-existent
Single vs. Double Pane Windows Not generally cost-effective Energy savings are minimal in the short-term
Greywater Heat Recovery Systems Used water that can be captured and cycled back into water heating system Primarily used for shower or gardening $200-300 with payback period of 2 to 3 years Can save 10% on total household energy bills