With the arrival of the sustained colder temperatures, heating systems are operating more frequently and for longer periods of time, which can increase monthly energy costs. Avista suggests checking your home’s air flow and making sure to use supplemental heating sources efficiently to help manage your winter energy bill. Making sure door sweeps are in good condition and caulking around windows and doors will help prevent cold air from seeping in under doors. As a temporary measure, roll a towel and place at the base of exterior doors. Other no-cost recommendations include:January 9, 2019 6 a.m. read more..