Good afternoon!

I’m a former framer and current project manager for my family’s residential construction company in Massachusetts. We’ve been building mid-range to “luxury” custom homes for just shy of 100 years. Over the last few years, I’ve been slowly trying to push my father, the president, into the high-performance area of building, as I know this is where the future of residential building is headed, and it’s extremely necessary. I’ve also decided that I’d like to build my own home for my fiancé and I, as well as our 18 month old son, Leo. I learned a lot during my time in the Building & Construction Technology program at the University of Massachusetts, Amherst, but have lost some of that knowledge as well since graduation, which is part of why I’m here. Here’s my question:

I’ve been doing some research on Triple Glazed windows, and my family has used Pella Windows almost exclusively for quite some time now. I’m sure some of you would have a coronary if you saw the performance of these, however, it seems as though they actually make a pretty decent triple glazed window under the “Impervia” series. I’m looking specifically at the “Natural Sun Low-E” fixed and casement windows at the bottom of the attachment, and I will attach their specs below. Based on my research, these U-Values, SHGC’s, and VLT’s actually seem pretty damn good, and I can get them for a decent price given the fact that we’ve been doing business with them for decades. Wondering your opinions on these specs and if there’s something I’m missing in terms of overall performance, or anything of that nature? Sorry for the long-winded question, just could really use some help in my attempt at my first high performance, “Pretty Good House”. Thanks guys and have a great night. Really looking forward to some feedback.