Heating is the largest energy expense in most homes, accounting for 35-50% of annual energy bills in colder parts of the country. Reducing your heating energy use is the single most effective way to save money and reduce your home’s contribution to global climate change. Sealing your home from the weather can reduce your heating and cooling costs by 15 to 30%. It will also make your home more comfortable inside. You might want to consider conducting a do-it-yourself energy audit, hiring a professional, or checking to see if your city or utility offers free or reduced-cost programs. Check out the Local Resources section to find services available in your area.