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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Remember that windows are entered in units of feet, not inches. If your clients entertain guests quite often, you would like to have their HVAC system sized so that your clients and their guests will be comfortable.

Elite Software Chvac | موقع مهندسى الكهرباء والميكانيكا العرب

So if nothing is to be added on fan column, it simply puts zero, as calculation algorithm likely does not have subtraction at that column. I noticed that Elite doesn’t consider the supply fan sens loss during the winter, only during the summer.

East and west glass have the same load factors while north and south glass are each unique. Click Here to join Eng-Tips and talk with other members! It is a value that Rhvac Online automatically calculates based on the grains value of the indoor room condition and the grains value of the outdoor design condition.

Since the ratio of a room’s sensible gain to the sensible gain of the system is probably not equal to the ratio of the rooms sensible loss to the sensible loss of the system, the rooms’ heating and cooling airflows are probably different, so the sum of the room airflows may not equal that of the system. Remember that the supply CFM is based on the leaving coil – room delta T temperature difference and the sensible load in the space.


There are several factors that can greatly contribute to the loads on a building. I just want to know which is right. Another reason for excessively high loads could be windows. Also, if the latent loads are a high percentage of the total loads, the supply CFM will calculate out less than CFM per ton even with a 20F delta T.

What are the limits of the demo version of Rhvac Online? Since the sensible gain for windows and skylights at the system level is always based on the average load procedure plus any AED excursion load, the sum of the msnual cooling airflows will be larger than that of the system in this case. By “hidden” sensible and latent sovtware, we mean loads that are present but might not necessarily be obvious to a new user. We recommend that you add Btuh for each bathroom and washroom.

A load is a load. The Default room is not a real room and its presence does not affect cooling and heating loads. This is wrong, isn’t it? You can assign a zone aoftware a system for every room in your project see Room Data topic. Join your peers on the Internet’s largest technical engineering professional community.

Walls, roofs, and glass sections each have their own hourly load factors that are dependent primarily on orientation and time of day.

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Why does changing the direction of a roof not affect the roof’s loads? The Eng-Tips staff will check this out and take appropriate action.

You are not required to zone your building and by default there is only one zone. Even though Manual J recommends using the same infiltration rate for all buildings over square feet, we have found that you should continue reducing the air changes per hour rate as the building size increases over square feet.


If there is any doubt as to the “tightness” of the construction on a building, select your infiltration value somewhat on the high side. The important point to remember is that Rhvac Online does not depend on the time of day, rather softeare depends on the peak load. Check your sensible and latent loads. Posting Guidelines Promoting, selling, recruiting, coursework and thesis posting is forbidden.

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

softwarw All of these methods employ more sophisticated procedures than what Manual J uses. Check the infiltration rate entered on the System Data page and make sure it is not too low. Defense manufacturing is all about project manufacturing and project accounting.

You can also obtain load reports for every system and zone in your project see the Select Reports topic. I never subtract internal heat gains from heat loss siftware.

Elite Software Chvac 8.02.32

I have learnt a great deal. The load adjustment can be made for each room on that room’s Room Data page.

Rhvac Online is based on Manual J and is intended primarily for detached residential buildings. Nevermind that east glass has more heat gain in the morning and less heat gain in the afternoon. The Default room stores your most used material types and data entries. We do not recommend that you grossly oversize a unit, but we do recommend that you adequately size the chvaac to handle some unexpected loads.

Chvac does give you overview of all loads in good manner.