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“your body filters Merv 8, do you want to just protect your furnace? merv 4, or allow your body to take a break? Merv 11-12... higher Merv will make your furnace work harder, so consider changing them more frequently.” Reddit · r/homeowners buy ac filters online
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Shoppers often debate whether higher MERV ratings are worth the potential strain on older systems. Go to product viewer dialog for this item
