Oversizing/Undersizing Equipment

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Well the reason I am trying to create unmet load hours is per ASHRAE 90.1.
My proposed model has slightly more than 50 unmet heating hours and to get
the difference to less than 50 ASHRAE says you should decrease the equipment
capacities on the baseline building. The space in my building that has load
problems was designed as a kitchen with a significant amount of commercial
kitchen equipment, however, the kitchen installation is being delayed and
will not be completed at this time. The equipment had been creating quite a
significant heating load, but without that the proposed equipment cannot
quite meet the load. As far as the building is concerned I don't see this
as a problem because until the kitchen is installed the room will most
likely be used as storage, if for anything at all. ASHRAE requires that the
difference be less than 50 though, and I don't see anything else I could do,
other than placing the equipment back into the kitchen as though it were
being installed at the time of the building submittal.

Perhaps I am not spending enough time trying to minimize unmet hours in the
proposed model, but I am not in charge of the design, I am just putting
everything into the model. As far as I can tell I have put in all of the
variables as accurately as I can. Not to say it's perfect, but it's pretty
good.

Michael

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