Elite Software combines all of the hvac design manuals into one simple to use Cad That’s a Plan”, “Hit the Load J”, “Basic Duct Principles”, and “CHVAC ”. chvac logo Commercial Load Calculation Software. Calculates heating and cooling loads for commercial applications, compliant with ASHRAE Standard Elite Software Chvac Medical Gas and Vacuum Systems Handbook NFPA Health Care Facilities The B-Line series Cable Tray Manual

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Because Rhvac Online groups rooms into zones and zones into systems, zones, as well as rooms, are not independent of systems to which they are assigned. Check your sensible and latent loads. Why does HAP subtract the supply fan load and Elite doesn’t? Finally, the two people per bedroom is a recommended procedure to estimate the minimum number of people in a building.

In some other packages I used to use psychro module is also separate. By “hidden” sensible and latent loads, we mean loads that are present but might not necessarily be obvious to a new user. Another reason for excessively high loads could be msnual.

Another way it can happen is when you have assigned rooms within the same system to more than one zone, and the “Use CV if multizone” input on the System Data page is set to “No.

Question for anyone who uses Elite Chvac. – HVAC/R engineering – Eng-Tips

The Ventilation Required CFM entry in the Manal Data screen is just used as a check for your benefit in the printout to ensure that individual room ventilation requirements are met by the system. A system xoftware a group of zones maintained under certain design conditions. Note, however, that if your building appears to have more appliances than normal, you need to adjust your sensible loads accordingly. You have to save “clever” work for yourself.

Elite leaves such decisions to the judgement of the designer, but cautions that Manual J tends to calculate lower cooling loads than ASHRAE, especially for glass. Download Now Defense manufacturing is all about project manufacturing and project accounting.


Elite Software Chvac 8.02.32

Unless the roof is referenced by a skylight window s in Glass entries on the Room Data page, the direction of the roof will always be UP, no matter what direction you specify and, therefore, will not affect the loads. When I drop the humidity of the air below a certain point, reheat coil should be added in order to reheat the air to maintain the sens zone temperature.

What is a zone? It’s easy to join and it’s free. At best, software is your reliable helper who does less errors in tedious tasks. Check your people loads entered on the Outdoor Design Conditions page and make sure that reasonable values have been entered for active and inactive loads per person. Promoting, selling, recruiting, coursework and thesis posting is forbidden. The load adjustment can be made for each room on that room’s Room Data page.

There are several factors that can greatly contribute to the loads on a building. Red Flag This Post Please let us know here why this post is inappropriate. Walls, roofs, and glass sections each have their own hourly load factors that are dependent primarily on orientation and time of day.

Why do the reports not show net tons or recommended tons? Therefore, you need to place the people where you expect them to be when the peak load occurs.

For example, appliances produce a sensible load.

Check your component dimensions for each room on the Room Data page chac check that they have been entered using the right units. HAP has their own agenda. We do not recommend that you grossly oversize a unit, but we do recommend that you adequately size the unit to handle some unexpected loads. You can also obtain load reports for every system and zone in your project see the Select Reports topic. Chvac does give you overview of all loads in good manner.

The important point to remember is that Rhvac Online does not depend on the time of day, rather it depends on the peak load. The load calculation demo version is limited to three rooms, 15′ wall lengths and 8′ wall heights. Check to make sure that this delta T is 20F or very near 20F.


By conservatively, we mean be critical about rating a house as having “tight” construction. The Rhvac Online program allows you to have several systems within the same project and specify different design conditions for each one of them on System Data page.

It is provided for your convenience, so that, instead of entering the same room component over and over again, you could simply copy it from the Default room. There are several things that you should check and that might be responsible for low loads: Click Here to join Eng-Tips and talk with other members! There are several things that you should check and that might be responsible for low loads:.

Wall loads are even further simplified in Manual J. Why do the reports do not show net tons or recommended tons? East and west glass have the same load softwade while north and south glass are each unique.

This is wrong, isn’t it?

The sensible gain for windows and skylights at the room level and therefore room airflow will then be equal to the sensible gain of the hour in which the glass sensible gain is the highest.

Go to the following page: Why does the sum of the room airflows not equal the airflow of the system? If the roof is exposed to a conditioned area, select Roof on Exposed Beams roof material selections 17A through 17L and enter dimensions of inclined and flat portions of the roof in the Room Data page.