I was thinking on buying a digital air flow meter that measures air flow,wb Temps,humidity,dew point,and capacity in Btu's and its a general brand made by mannix.
This would save me on buying separate meters if its not junk,anybody have one or know anybody that does? I was really interested in the btu measurement,I guess when you measure register flow you can get fpm,cfm,btu's,any feedback or advice appreciated.
if you measure all registers and add up cfm's and then test air flow at furnace T.E.S.P and get your cfm total from there I was wondering how accurate your duct loss would be then giving a good idea how tight the ducts are? it seems this tool could do alot.