That’s right — now, your furnace can whistle while it works! Or, rather, doesn’t work, as the furnace filter whistle emits noise when your furnace filter is 50 percent clogged. Knowing when to change your furnace filter can go…
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That’s right — now, your furnace can whistle while it works! Or, rather, doesn’t work, as the furnace filter whistle emits noise when your furnace filter is 50 percent clogged. Knowing when to change your furnace filter can go…