Category Archives: RHVAC Help

Which one of the Roof/Attic options do I choose?

October,30,2017 at 3:11 pm

The Roof Material Type 16 in the RHVAC (and ACCA) Tables give you a lot of options. What’s the difference? They seem the same!

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How many people did I put in?

August,10,2017 at 2:42 pm

Okay, this is a common problem… You finish the load and you are confident you’ve added the people into the load. (For the people load as you no doubt know, you count the number of bedrooms and then add one.) So, if there are three bedrooms you will put four people in the home. You read more »

When you have a Dehumidifier in the system

August,10,2017 at 2:01 pm

From our instructor and friend, Tim Pierre, New Orleans, LA We have been using dehumidifiers with increasing frequency in the new homes and retrofit projects here in the south.  A dehumidifier reduces the latent load, thus changing the size of equipment needed in the structure.

Organize Equipment Files in Model View

June,21,2017 at 6:06 pm

Most manufacturer’s databases can be quite extensive. It’s likely you won’t use  every piece of equipment in the database. No problem! You can delete any units don’t want in your list. Open up the Model View – go to Tools on the menu bar and select Manufacturer’s Database (Model View).   First check on the read more »

Fan External Static Pressure

May,22,2017 at 9:27 pm

If you are doing a Manual D, whether through Tabular Manual D or through MD Ductsize, you will want to make sure you have the right external static pressure. It’s really simple in both programs.

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