Cooling Load Calculator for RTU
Cooling Load Calculator for RTU
(OP)
Hello All:
Can somebody recommend and online calculator resource or free software to run some basic cooling loads for medium sized church in Dallas Texas.
Thanks a lot.
Can somebody recommend and online calculator resource or free software to run some basic cooling loads for medium sized church in Dallas Texas.
Thanks a lot.





RE: Cooling Load Calculator for RTU
RE: Cooling Load Calculator for RTU
I don't know of any free software, by the way, other than those that might be given to HVAC engineers by the big manufacturer's reps like Trane and Carrier.
RE: Cooling Load Calculator for RTU
TTFN (ta ta for now)
I can do absolutely anything. I'm an expert! https://www.youtube.com/watch?v=BKorP55Aqvg
FAQ731-376: Eng-Tips.com Forum Policies forum1529: Translation Assistance for Engineers
RE: Cooling Load Calculator for RTU
If you do happen to find a free online load calculator, use extreme, extreme caution. More likely than not, to be free they are not up to date with current code ventilation requirements, offer only block load calculations, are limited in system options, have limited wall/roof/window libraries or any combination of these factors. Last time checked, they were almost exclusively geared toward residential applications.
I'll double down on my comment that a church is a whole other ballgame from a residence.
I agree with Willard and BronYrAur, hire an HVAC professional engineer for the job.
RE: Cooling Load Calculator for RTU
@IRstuff, thanks for the figure, will consider it.
@dbill74. Thanks for your comment, forgot to mention my background, lately involved on a lot of HVAC design upgrades, restaurants, kitchens, and fixups and excited to design rational systems that take into account all considerations. Not really looking here for a shortcut, as I personally dont like them. Maybe my original post was misleading. Yes, my strength is structural, but HVAC endeavours are coming in strong due to market. Best! I have been in Texas only two years right after licensure.
Thanks to all who made intelligent, contributing responses to my original post.
RE: Cooling Load Calculator for RTU
RE: Cooling Load Calculator for RTU
Total Heat 0.04 - 0.06 Tons/Seat
Total Heat 480 - 720 Btuh/seat
Room Sensible Heat 260 - 330 Btuh/Seat
SHR 0.65 - 0.75
Air Flow 15 - 30 CFM/Seat
Air Change Rate 8 - 15 AC/Hr
RE: Cooling Load Calculator for RTU
knowledge is power
RE: Cooling Load Calculator for RTU
TTFN (ta ta for now)
I can do absolutely anything. I'm an expert! https://www.youtube.com/watch?v=BKorP55Aqvg
FAQ731-376: Eng-Tips.com Forum Policies forum1529: Translation Assistance for Engineers
RE: Cooling Load Calculator for RTU
I'm guessing you attend this church and want to help them out to avoid engineering costs. Do so with caution. Although the church may save money on the design, they may pay for it several times over with a poor end result. This could be any number of things. Oversized equipment that cycles to often and won't stand the test of time. Undersized equipment that won't handle the load. Or just a cheap installation that doesn't consider the application. I have seen fan coils literally hanging from the walls of old church sanctuaries. They were loud and set to have the fan cycle with the condensing unit so that it was extremely noticeable. That is the last thing I would have done. One of the challenges of a church is to hide the equipment so that you don't see it, hear it, or feel it. A church member in the HVAC business might not necessarily take all of this into account. I'm sure cash is tight, as with any church, but spend it wisely by starting with the correct design. An stay on top of the engineer you hire to make sure it is a quiet system that is hidden as well as possible.
RE: Cooling Load Calculator for RTU
A church is not a simple system and "rules of thumb" will bite your butt.