We own a 2017 Miramar 37.1 and after speaking with the owner Richard, he explained that even though he didn't have actual data on most class A units, it should work on our Mach ac units. I ordered 1 to test out the front living area since I can say it's been the cause of many arguments with momma bear. I measured the supply from each duct vent before and after and was amazed of the increase in air circulation within the space. My measurements were in MPH since I couldn't measure cfm with my gauge. It went from 4mph to about 9mph consistently throughout the 6 vents. Needless to say I ordered the second one.
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