HVAC Installation Team Rocking Out

The answer depends on the type of rooftop that is being used. Most rooftops fall into one of three categories –Constant Volume, Variable Volume, and Constant Volume Fan with Variable Volume Terminal Devices.

For a constant volume RTU, there are three airside system types that are typically used – Single Zone, Variable Temperature Constant Volume, and Terminal Reheat.

The single zone and VTCV system types are very similar. They should be used to model RTU’s that have one heating coil, one cooling coil, and one constant volume fan that serve one or multiple spaces. For the single zone and VTCV system types to serve multiple rooms in TRACE, a...

Many users do not know that you can use this website to network with other energy-modelers by adding them as friends, which allows you to post on each  others profiles, and follow each others forum posts more easily.

Also, if you want more control of this website, it is automatically granted so that you get more control as you provide more useful content (and prove that you are a respected member of the community).

The many intricate details of the website make it rather large and the site runs much faster using Mozilla Firefox or Google chrome! It's a modern web design, use a modern browser!

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          Bring up any topic regarding the environment and you will be sure to hear at least two opinions. Actually, if you bring up any topic to a group of 10 engineers, you will probably hear at least 9 different opinions. This is true when talking about energy-modeling.

          To avoid argument, let's consider energy in terms of absolute truths. Apart from members of the "Flat-earth society", almost everyone considers scientific law to be an absolute truth. So, let's look at energy-modeling in terms of Laws. With it being related to energy, there is no better place to start than the Laws of Thermodynamics. 

        I...

Is insulation the end all energy saver? In some climates, this is 100% yes, especially climates that need mostly heating, or climates that need tons of cooling. However, proper insulation selection requires an energy model in many cases. Please note that the purpose of this article is to illustrate the importance of energy-modeling and to get users to think about preconceived notions. (I’m sure I’ll get an email from an insulation manufacturer)

Let’s take a look at a climate such as Dallas, Texas:

Like many climates in the U.S.A., it requires mostly cooling, but requires a decent amount of heating. Many commercial buildings do not require any heating until the outdoor ambient temperature...