A chief area we need to look at when doing a green remodel is in conserving our energy usage. In most climates, air conditioning and/or heating costs will make up the largest energy expenditures in a household. If you have old inefficient equipment then you’ll need to replace it as part of a green remodel. The energy savings produced could pay for the new equipment in a few years. If however, you do not want to invest in new equipment, you can still save energy by doing things such as: using a programmable thermostat to optimize your energy usage; insulating and sealing old windows, attics, doors and walls; changing and cleaning your furnace and air conditioner filters regularly; and insulating your water heater.