I agree that a high MERV rated filter can reduce your furnace airflow. I use a MERV 8. But, if a new house has construction dust from drywall cutting and other construction work, using a MERV 13 filter temporarily may be an inexpensive way to clean it out. I would buy a few of them and replace them frequently and check them for dust. Even when using a MERV 8 filter, I don't agree with the standard recommendation that the filter should last a year. I replace mine at least every 6 months.
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