1-4 of 4 Answers
Hello! The recommended is 3 inches. -M
Sorry, there was a problem. Please try again later.One to two inches. That is what most manufacturers recommend.
Sorry, there was a problem. Please try again later.I have it about an 1-1/2” to 2" and everything is great!
Sorry, there was a problem. Please try again later.Suggested air flow allowance in manual is 4 inches.
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