Abcleads.com BBB Business Review  NAHB member
Call us at
1-800-219-5332


All times are UTC - 5 hours





Post new topic Reply to topic  [ 4 posts ] 
Author Message
 Post subject: Okna 500DX and 800DX - same glass, diff ratings?
PostPosted: Mon Apr 11, 2016 8:28 pm 

Joined: Sat Mar 19, 2016 11:05 am
Posts: 26
Offline
Curious why the NFRC ratings differ (albeit minimally) between the Okna 500DX and the 800DX when the glass packs are the same? Is that due to the frames? In the end the numbers are very good for either unit.


Top
 
 

 Post subject: Re: Okna 500DX and 800DX - same glass, diff ratings?
PostPosted: Tue Apr 12, 2016 6:00 am 
User avatar

Joined: Wed Apr 04, 2007 11:21 pm
Posts: 4351
Location: DC Metropolitan Area-Maryland/Virginia/DC
Offline
The 800 series has the reinforcement in the rails of the sash as compared to foam in the 500 (if both deluxe) and the metal hardware is slightly thermally bridging as compared to none.


Top
 
 
 Post subject: Re: Okna 500DX and 800DX - same glass, diff ratings?
PostPosted: Tue Apr 12, 2016 9:21 am 

Joined: Sat Mar 19, 2016 11:05 am
Posts: 26
Offline
Makes sense. Thank you.


Top
 
 
 Post subject: Re: Okna 500DX and 800DX - same glass, diff ratings?
PostPosted: Tue Apr 12, 2016 10:54 am 
User avatar

Joined: Tue Feb 16, 2010 6:14 pm
Posts: 2352
Location: Milwaukee, Madison areas
Offline
Keep in mind Beano that the u factor for the entire unit as tested and certified by the nfrc is profoundly affected by the window assembly, not just the glass. You could take that same glass from the Okna, put it in another window, and get a far worse rating. It is a simple surface 2 low e coating from Guardian. Many other windows offer the same glass, and many others still use a similar coating profile from a different manufacturer like Cardinal. For instance, in a wood window, you may actually get worse than a .30 which was the previous Energy Star threshold... It is everything else that goes into both the assembled IGU, as well as the window assembly overall that has such a major impact on U factor.


Top
 
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 4 posts ] 

All times are UTC - 5 hours


Who is online

Users browsing this forum: No registered users and 8 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Jump to:  
Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group