能源部 DOE 算账：恒温器每天调低7到10华氏度、坚持8小时，全年冷暖费最高可省一成
取暖季开始，家庭能源账单随气温下降而上升。美国能源部 DOE 的 Energy Saver 节能指南列出了几项当季就能做的家居节能安排，其中最核心的一项是恒温器的设定方式。
DOE 的建议是：人在家且清醒时，恒温器设在约68华氏度；睡觉和外出时调低。其公布的数据显示，把恒温器调低7到10华氏度、每天坚持8小时，一年下来取暖与制冷费用最高可节省约10%。安装可编程恒温器或智能恒温器后，调温可按作息自动完成，不必每天手动调整。
堵住漏风是第二项。门窗框、管线穿墙处的缝隙是暖气外流的主要通道，可用填缝剂和密封条逐一处理；白天打开朝南窗户的窗帘、让阳光进屋增温，日落后把窗帘关严，减少夜间热量流失。
设备保养方面，供暖季每月更换或清洗一次暖气炉滤网，堵塞的滤网会抬高能耗；家具和地毯不要挡住出风口与暖气片；热水器的温度设在120华氏度，既省电、又降低烫伤风险。
DOE Math: Turn the Thermostat Back 7–10°F for 8 Hours a Day and Save Up to 10% a Year on Heating and Cooling
Heating season has begun, and household energy bills are climbing as temperatures fall. The U.S. Department of Energy DOE, through its Energy Saver guidance, lists several steps households can take this season — starting with how the thermostat is set.
The DOE recommends keeping the thermostat at about 68°F while you are awake and at home, and turning it down while you sleep or are away. According to the department, turning the thermostat back 7 to 10 degrees Fahrenheit for 8 hours a day can save as much as 10% a year on heating and cooling bills. A programmable or smart thermostat can make those setbacks automatically on a daily schedule.
Sealing air leaks comes next: drafts around door and window frames and where pipes pass through walls let heated air escape, and caulk and weatherstripping can close them. Open curtains on south-facing windows during the day to let sunlight warm the rooms, and close them at night to cut heat loss.
On maintenance, replace or clean the furnace filter once a month during the heating season, since a clogged filter drives up energy use; keep furniture and rugs clear of vents and radiators; and set the water heater to 120°F, which saves energy and reduces the risk of scalding.
发布：GSM·美国（发布链接）
图片来源：图：墙上数码恒温器显示室温66华氏度、处于供暖模式（资料图）。Ente75 摄，CC0，via Wikimedia Commons / Photo: A digital wall thermostat reading 66°F in heat mode (file photo). Ente75, CC0, via Wikimedia Commons
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