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 Post subject: OKNA 400 vs 500 series
PostPosted: Sun Jul 25, 2010 6:38 pm 

Joined: Sun Jul 25, 2010 6:34 pm
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What is the main difference between the Okna 400 vs 500 series?


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 Post subject: Re: OKNA 400 vs 500 series
PostPosted: Sun Jul 25, 2010 7:52 pm 
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Joined: Wed Apr 04, 2007 11:21 pm
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Location: DC Metropolitan Area-Maryland/Virginia/DC
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Aesthetically, the 500 is prettier in my opinion. It has more exterior detailing to it. The installers like it better because of the accessory groove where the 400 has none.

Performance wise, virtually identical with the exception of the air infiltration.


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 Post subject: Re: OKNA 400 vs 500 series
PostPosted: Mon Aug 02, 2010 12:04 am 

Joined: Sun Jul 25, 2010 6:34 pm
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Thanks. Will the difference in air infiltration between the 2 be noticeable on an installed window?


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 Post subject: Re: OKNA 400 vs 500 series
PostPosted: Mon Aug 02, 2010 7:04 am 
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Probably not. You are only talking about the difference between a 0.02 and 0.05 cf/min.

That being said, I think the 500 is the better window.


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