Stay Warm. Save Energy. Cold weather can increase your energy bills. Here are some tips that can help you make a big difference every month.* Lower your thermostat to 68 degrees during the day and 58 degrees when you are away from home. Change or clean your heating and air conditioning unit filter regularly and according to the manufacturer's instructions. Your equipment will use less energy if it 'breathes' more easily. Keep your fireplace damper closed unless a fire is burning. Leaving the damper open is like keeping a window wide open - warm air goes right up the chimney! Find more helpful winter information at atmosenergy.com/WinterReady. *Consider implementing these energy-saving tips where safe to do so. ATMOS energy. 00 Stay Warm . Save Energy . Cold weather can increase your energy bills . Here are some tips that can help you make a big difference every month . * Lower your thermostat to 68 degrees during the day and 58 degrees when you are away from home . Change or clean your heating and air conditioning unit filter regularly and according to the manufacturer's instructions . Your equipment will use less energy if it ' breathes ' more easily . Keep your fireplace damper closed unless a fire is burning . Leaving the damper open is like keeping a window wide open - warm air goes right up the chimney ! Find more helpful winter information at atmosenergy.com/WinterReady . * Consider implementing these energy - saving tips where safe to do so . ATMOS energy . 00