HFS Filter Whistle

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A dirty or clogged filter can cause your HVAC system to run harder, which can increase your energy bill or even worse could cost you money in repairs. Being notified when to replac e your furnace filter on time will allow you to keep your air handler or furnace running properly, saving you energy in the long run. The filter whistle sounds when your air filter becomes 50% clogged letting you know it will soon need replacing. Show more