Return to the Plumbing Forum | Post a Follow-Up

 o
Does water heater height make a difference?

Posted by mrpandy (My Page) on
Tue, Oct 21, 08 at 13:38

Is there any correlation between the height of a water heater and its efficiency?

I'm considering buying a GE 50 gallon, 12 year water heater from the Big Orange Box. They have two models - tall and medium height. I'm going to hook up the new heater in a different location than the old one, so there's no need to buy the same size. Is one recommended over the other? If there's no difference, I'll get the tall one to preserve floor space. Thanks.


Follow-Up Postings:

 o
RE: Does water heater height make a difference?

Look at the efficiency ratings.

In theory, minimizing surface area should increase efficiency. If my high school geometry is getting recalled okay, a cylinder of a given volume will have a smaller surface area if it is shorter and wider. However, that doesn't account for, for example, heat rising (meaning a bigger top surface is worse), or individual design characteristics.


 o
RE: Does water heater height make a difference?

It is also a fact that short water heaters will deliver more hot water on first draw due to wider vessel allowing for more draw from top before the cold water incomming stratifies the entire tank.

In addition larger diameter tank bottom increases surface area for burner contact, shorter flue up center decreases chimmney effect cooling tank when burner is off.


 o Post a Follow-Up

Please Note: Only registered members are able to post messages to this forum.

    If you are a member, please log in.

    If you aren't yet a member, join now!


Return to the Plumbing Forum

Information about Posting

  • You must be logged in to post a message. Once you are logged in, a posting window will appear at the bottom of the messages. If you are not a member, please register for an account.
  • Posting is a two-step process. Once you have composed your message, you will be taken to the preview page. You will then have a chance to review your post, make changes and upload photos.
  • After posting your message, you may need to refresh the forum page in order to see it.
  • Before posting copyrighted material, please read about Copyright and Fair Use.
  • We have a strict no-advertising policy!
  • If you would like to practice posting or uploading photos, please visit our Test forum.
  • If you need assistance, please Contact Us and we will be happy to help.


Learn more about in-text links on this page here