Switch to low flow or dual flush toilets. These particular toilets only use 1.28 gallons for liquid flushes. Families typically use 20-40% less water by using them instead of average toilets. On average, a family can save up to 2,000 gallons of water per year! This can provide significant savings to your water bill, every single month.
Air flow is controlled best in homes with storm windows and doors. Storm doors and windows dramatically reduce the amount of drafts and cold air that get into your home. Energy efficiency can be increased up to 45% in a home with storm windows and doors.