Using the FP1 118.7CFM@28" calibration plate I obtained the following results with a .515Cd on a 2.035" orifice
28" - 118.7 [factory specs for the FP1
I then decided to test down progressively in pressure and compare actualy results to calculated conversion values.
25" 111.6 CFM ----Calculated 28>25 112.2 CFM
15" 84.7 CFM ----Calculated 28>15 86.9 CFM
10" 68.4 CFM ----Calculated 28>10 71 CFM
Next up with my Superflow 110 test plate 153.2CFM @10". I mounted the plate with the small hole toward the front of the bench for the first test.
10" 149.9 CFM ----Calculated 10>20 212 CFM
20" 213.9 CFM Actual reading at 20"
I turned the plate around 180* - small hole to the back
10" 146.5 CFM Calculated 10>20 207.2 CFM
20" 211.0 CFM Actual reading at 20"
During the last test, the furnace blower kicked on. Though there is no heading vent near the flowbench, there may have been small influence from air movement in the room.
I hadn't expected the calculated results for other pressures to match the actual readings I got and they didn't. All things considered though, I think the readings came out rather good.
Comments..thoughts..input are welcome...
Larry C
