Window4U (IL) wrote:
As long as the installers of the Okna 500 are well respected and do good work, that window would be my first choice without question.
Can you help me understand why....Both are AAMA Gold, R-50, DP-50, 171 Structural, Air Infultration is a little better of .07 vs .02, one uses block n tackle the other constance force, full beveled heads, U-value is close.....
Given that my windows are over 40" would it not be wise to consider the softlite for the sash reinforcement factor??
Also, what about the whole foam window issue where Okna was part of the investigation.
There is more to the project than just windows. Other trim things. The whole project is $10K. I just want to make sure I have chosen wisely.
What MAKES the difference...
Both windows will serve you well in this case, however, the performance nod goes to the Okna 500 in this case.
While the difference in air infiltration numbers may appear slight (it is) the Okna is a far newer design and as mentioned, the Soft-Lite Pro is an older model that has since been replaced (to the extent that they have developed newer and more advanced extrusions and designs) by the Imperial LS and Elements.
If I were choosing a Soft-Lite window, I would opt for either of those two and the comparison windows in the Okna line would be the 500 and 800 series.
I would also say that the 500 series as a Deluxe model does give you a roughly 10% performance advantage over the Pro from a thermal performance standpoint too (0.28 vs. 0.25). If the prices are similar, opt for the tighter and more thermally efficient window. The 500 also gives you a tiny (1%) more visible light as compared to the Pro but that is very slight.
40" wide is quite alright and well within the engineering specification of the 500 given that it has a very thick mil thickness on its extrusion. If you really want reinforcement, opt for the 800 series at that point and you will have the equivalent window to the Elements and one of the 2-3 best vinyl windows on the market without question.
The foam issue, as mentioned, was dealer specific and has been retrofitted and closed out. This is why Okna moved to an inserted foam so that there isn't even the potential for partial fill rates.What MAKES the difference...
Here is probably the most impactful question of all.
Comparing two relatively similar (nod goes to the Okna in performance) performing windows, the difference maker comes down to installation. The best window in the world installed by a hack will perform like garbage and you will be left with a substandard performing window/building opening.
Which company will do the best job on the installation and is using the most up to date installation protocols and materials? Is one company using spray foam and one is not? Is once company using premium coil and sealants and one is not? Have you seen work samples or talked to past customers?
Which company did you feel best about?