Return to the Windows Forum | Post a Follow-Up

 o
Energy Cost savings

Posted by slothrop (My Page) on
Sun, Oct 6, 13 at 19:05

I live in Southern California and we are looking at replacement windows - either aluminum or fiberglass. Obviously the fiberglass would be much more energy efficient but I was wondering how to calculate the cost savings based on the numbers. For example - Milgard Ultra with a U-factor of .35 and a SHGC of .27 vs. the aluminum with a U-factor of .56 and a SHGC of .29. What kind of savings would I be looking at - especially since I am somewhat close to the coast and don't often have to run the a/c or heat. Thanks!


Follow-Up Postings:

 o
RE: Energy Cost savings

Nearly impossible to say without some very specific and exhaustive data on the home, climate, construction, utilities, etc, etc.

The air infiltration of the two units plays into this equation as well.

Sorry...but there is just no simple answer.

Will the more efficient unit save you more money (provided they have similar air leakage rates)...yes. How much is totally dependent on the home.


 o
RE: Energy Cost savings

Very difficult to quantify. Of course if will make a difference..
Why are you looking at windows with a ufactor of .35 ? That is much too high and not very energy efficient. You need something lower than a .30 at least.


 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 Windows 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