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MJK
Comentado en los Estados Unidos el 25 de febrero de 2025
I wanted this item for the purpose of measuring the pressure drop across furnace filters. If the pressure drop gets high it means one of two things, either the flow rate is very high, or there is significant dirt/dust accumulation in the filter that is causing a low flow (with a high pressure drop.)The bad news is that the Manufacturer's design of this meter is such that it will only measure down to the 10ths of an inch of water pressure, which is marginal.My reading was 0.2" of water pressure. (which really means the actual pressure drop was between 0.15" and 0.24" of water pressure drop, but the measuring device was not accurate enough to measure this. (so think of this putting out the same pressure differential as a quarter inch of water in a cup. If you get upwards of 1/2" of water in a cup for a pressure drop you could start having problems with your furnace due to low flows! It may even trip the firing of the furnace until the furnace has a chance to cool down.Sometimes it is also due to the filter rating. Excellent filters are now available. Filters that can virtually scrub the air clean of even microscopic particles virtually making the cleaning of the outlet ducts unnecessary, or at least allowing a much greater time between cleaning. Unfortunately, these filters usually have a relatively high pressure drop brand new.With the advent of variable speed fans it seems possible that a fan that is capable of putting out high pressures and high flow would be real.And the bottom line for this meter is, if the operation range could be made reasonably accurate down to 1/100" of water pressure this could be a valuable tool for analyzing furnace filter.
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