Member Login

Remember Me
Forgot Password?
Join Us!

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

Join Eng-Tips
*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.
Jobs from Indeed

Link To This Forum!

Partner Button
Add Stickiness To Your Site By Linking To This Professionally Managed Technical Forum.
Just copy and paste the
code below into your site.

Equivalent Full Load Operating Hours

Equivalent Full Load Operating Hours


Does someone know where I can find Equivalent Full Load Cooling Operating Hours by city or state? Or how to calculate these hours given the cooling degree days?

Thank you all!


RE: Equivalent Full Load Operating Hours

I never heard the term before and I always use a BIN analysis (there is a recent thread on this subject), however I found the following information on the web:

Annual equivalent full load cooling hours (AEFLCH) is the number of hours an air conditioner would run at full load to consume the same amount of electric energy that it consumes on average over the course of an entire year. AEFLCH can be estimated through the use of cooling degree day data. A discussion about estimating cooling loads using degree days can be found in the 1997 ASHRAE Handbook, Chapter 30, page 30.17. For information about ASHRAE publications, go to

RE: Equivalent Full Load Operating Hours

EFLH is (was) used to very quickly calculate the annual energy consumption of an A/C device.  Annual Energy Consumption (kWHr)= full load kW/Ton x Load (Tons) x EFLH

The proliferation of PC and software that can easily and quickly calculate a more accurate energy consumption have reduced reliance on EFLH.

I have seen the Table you are looking for in a couple of Value Engineering Handbooks and can email some info if remain interested. I also believe such a Table exists in the old Carrier handbooks.


Red Flag This Post

Please let us know here why the post below is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close