My Wildwood had poor flow. Fortunately, FR used rectangular metal ducts for the runs. I pulled the registers which were spaced every 4 to 5 feet and with a mirror and flashlight I was able to look down the line. I found 2 problems. First, where the plenum under the heater attached to the duct, they did not fully cut our the opening where the duct attached resulting in about a 40% blockage. Then further down the line the pedestal base for the table as directly over the duct and crushed it down to about 50%. GREAT design!
After remedying both those heater now works good.
