ENERGY TIP
Most filters are labeled with a MERV (Minimum Efficiency Reporting Value) rating number, which measures a filter's ability to trap particles ranging in size from 3.0 microns to 10.0 microns. Residential filters commonly have MERV ratings of 1-12. In most cases, a pleated filter with a MERV rating between 6 and 8 is adequate. Remember to clean or change your filters at least every two months during the heating season.
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The Waverly Light and Power Conduit service includes a Technical and Business "Ask an Expert" Hotline, which is a one-on-one access to engineers, industry, and business experts who want to answer your questions. This service is FREE to our customers. There is no usage limit, all questions and answers are held in strict confidence, and answers are typically issued within 24-48 hours.
To ask a question visit Ask an Expert 
or call 800-824-0488.