Running your furnace, central air, or heat pump probably constitutes a big part of your utility bill. But it’s a small, often inexpensive part—the air filter—that keeps these heating and cooling ...

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Each result is described briefly below: •Area 1: Flue Gas Entering Filter: •Temperature In: Temperature of the flue gas entering the fabric filter. This is determined by the flue gas outlet ...

If you have asthma symptoms, an air filter or room air cleaner may help you to breathe better. The same is true for those with hay fever (allergic rhinitis) or COPD (emphysema or chronic bronchitis).