[Hap-users] A survey on measuring wall height

Reba Schaber Rschaber at PHMECH.com
Thu Feb 17 18:38:53 PST 2011

When measuring the wall height to determine the wall area, it's clear the measurement should be floor to floor for return air plenums.  Then the appropriate percentage is used in the wall-to-plenum heat gain field of the System's duct system data.

How many HAP users still measure floor to floor when there is ducted return?  Have you then entered the wall area by measuring floor to ceiling to check the effect on the load?  What is that effect?

It is such a hassle to re-enter the wall area if the system changes from return air plenum to ducted return.  It would seem the safest assumption is to enter wall areas by measuring wall height from floor to floor.  Do you agree?

         Reba Schaber      Mechanical Engineer, P.E.
                                     LEED Accredited Professional
1660 N. Alvernon Way                Voice: (520) 731-2060
Tucson, Arizona 85712                Fax: (520) 731-2061
                        rschaber at phmech.com<mailto:rschaber at phmech.com>

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