Setting your refrigerator temperature below 40 degrees is unnecessary and uses more energy.
Calculation in Completed Actions is actual savings which is updated monthly.
Lowering the thermostat will enable your heating system to use less energy, and is a worthwhile consideration in circumstances where there is little impact to comfort.
Let the warm sunlight in through south-facing windows to lower the heating bill and reduce the need for additional lighting.
Significant amounts of warmth in winter and coolness in summer escapes up the chimney. The damper prevents these losses when closed.
If a limited amount of cooling is needed and the outside air temp is acceptable, a whole house fan is a very economical solution - low initial expense and low running costs. A whole house fan is typically installed in the ceiling in the middle of the house, and is operated by opening windows and doors and turning on the fan; cool air from outside is drawn into the house and the existing warm air is exhausted up through the roof.
Crawlspaces are prone to moisture-related problems and are hard to inspect and maintain. Air seal, insulate, and install vapor barrier on crawlspace floor.
In addition to the protection they provide, storm windows and doors provide a significant additional thermal barrier and halt air leaks.
LED lighting makes more efficient use of electricity than all other forms of commercially available lighting methods, while offering superior functionality over other efficiency lighting (light-up time, color options, dimmable).
Skylights can lose heat in the winter, and gain heat in the summer. This can be reduced by replacing them with multipaned and insulated skylights.
A cool roof will significantly reduce the loss of coolness in the summer. This is especially important in areas where air conditioning is used a lot.
