[Healeys] Hot Air from my DustBuster

[Awgertoo at aol.com]

In a message dated 8/18/2009 8:40:39 P.M. Eastern Daylight Time,
steveg at abrazosdata.com writes:

"Air  Watts:
11" - whatever the hell an Air Watt is!



>From a quick search:

"an engineering unit used to express the effective cleaning power of a
vacuum cleaner or central vacuum system. The air watt is practically the same
as  the ordinary _watt_ (http://www.unc.edu/~rowlett/units/dictW.html#watt) .
Measurements  of vacuum power, however, are computed from English units
using the following  formula established by the American Society for Testing
and Materials (ASTM):  power in air watts equals 0.1173547F7S, or very nearly
F7S/8.5, where F is the  air flow in the system in cubic feet per minute
(CFM) and S is the suction  pressure in _inches  of water column_
(http://www.unc.edu/~rowlett/units/dictI.html#inWC)  (in WC). This definition
makes the
air watt equal to 0.9983  watt."

Best--Michael Oritt