你怎么知道炉子是否出现故障？
if your furnace is more than 15 years old it is nearing the end of its life. there are some signs that may indicate it's time for a replacement unit. while many problems can be repaired, on an older unit it will not be cost effective to make repairs at a certain point. if you see a sudden unexpected spike in heating bills, if the unit cycles frequently, if your home is being heated unevenly, or if you hear unusual noises coming from the unit, it's a good idea to have it inspected, and to begin considering a replacement.
yes. air that has too much moisture creates a breeding ground for allergens like mildew, mold, dust mites and bacteria. these irritants make their way into your home through the ventilation system, windows, and doors. with the right conditions, like plenty of moisture in the air, they can multiply into whole colonies of allergens within hours. 干燥的室内空气会刺激喉咙和鼻窦，引起症状 这可能看起来像过敏，但它实际上是医生所指的 作为非过敏性鼻炎。因为打喷嚏和堵塞不是 由过敏引起，典型的过敏治疗无济于事。通常 鼻腔冲洗和减充血剂之类的东西在这些方面效果更好 情况，而不仅仅是服用抗组胺药。