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What filter rating should I use

Post created: 2015-09-13 Type of Equipment: Furnace Views: 126

This question was created on the page: https://www.furnacecompare.com/furnaces/trane/xv90.html.

On 2015-09-19 wrote:

I advise customers not to go over a 7 merv rating.I go on many calls because of the 3m filtrete filter,some furnaces cannot overcome the obstruction.

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