Inside the System

What does the 'Use Load Credits' option in Heating / Cooling Loads do?

From the help file, it states: accounts for heating or cooling “credit” loads that take the form of negative loads. For example, heat that leaves a zone through a partition into another zone can be a negative load/credit.To exapnd on this, look at a couple of fundamental examples.In the case of a heating load, it is common to not include internal gains, such as people, power, and lights. The basic assumption being that these things may not actually be on or in the space to provide the gain. However, if you want to consider the internal gains in a heating calculation, the ‘Use Load Credits’ option will do this for you.For example, looking at a single zone, in the Use Load Credits case, you see the heating load is less due to the credits from the internal gains:Click to enlarge image.Taking a look at a cooling load case, in the image below, the two zones have different set points. Zone 1 is kept cooler; therefore, heat will “flow” from Zone 2 to Zone 1 (indicated by arrow 1). In other words, there is a load on Zone 2 due to Zone 1. Conversely, this means there is an internal loss from Zone 2 to Zone 1. However, if you don’t ‘Use Load Credits’ you don’t see this in your cooling load calculation. Arrow 2 on the tables below show the partition load, without the credit in Zone 2. Using load credits allows the reduction of the load in Zone 2, as shown by arrow 3.Click to enlarge image.

11/3/2011 6:10:10 AM

Keeping Label Text Readable in a Nested Annotation Family

Here's a quick demo of how to keep the text in a device symbol readable.

10/27/2011 3:56:28 AM

Autodesk Revit MEP 2012 Update 2 is now available

All,I am pleased to announce the release of Web Update 2 for Autodesk Revit MEP 2012, which is available via Live Update in the product or on Autodesk.com at http://www.autodesk.com/revitmep-download.The update can be applied to all languages of Autodesk Revit MEP 2012. We are still in the process of updating the various download pages for each language, but you can download the update from the English page in the meantime.A list of the enhancements can be found on the download page.http://images.autodesk.com/adsk/files/Enhancements_List_RME_2012_UR2.pdfRegards,David PothierRevit MEP Product Manager

10/4/2011 4:43:19 PM

Lighting Analysts releases ElumTools for Revit 2012

Yes, that's right, the folks behind AGI32 have done it... get more info here: http://www.elumtools.com/

9/22/2011 3:22:43 PM

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