Hi, I know that Marvin would not be considered a high efficiency window by the standards used in this forum, but for this question, I’m asking about Marvin. So if you’re in the know on this product (or window construction in general) I would appreciate some input.

I don’t understand the marketing of the Ultimate and Integrity product lines (i.e. casement and awning). The Ultimate line (considered their premium product, I think) has an extruded aluminum cladding … which sounds durable but I’m thinking is an energy efficiency no-no. I’m not clear on what thermal breaks it may or may not have in the frame.

Meanwhile, the Integrity line has a fiberglass exterior which is better (I would think) from an energy standpoint … However, Marvin considers the Integrity line their “value” product. Why is that? Is it just that the Ultimate line has more sizes and custom colors but is actually NOT the better window?! I can’t figure it from their marketing material.

The energy efficiency website for windows (can’t recall the site at the moment) lists the fiberglass (Marvin) windows with better U values than the Ultimate window. So, just trying to figure out this product line(s). Any insights?

Thanks

The Ultimate line is an all-wood frame window. The coated metal cladding is used on the outside for weather durability. What you see inside is a wood window. People like the look of wood. Wood makes fine windows. That is why it is a premium product.

The Integrity line has both all-Ultrex (pultruded fiberglass) and combination Wood-Ultrex windows. What you get with the all-Ultrex is fiberglass frame, inside and outside. Of course, with the Wood-Ultrex, you see wood inside and fiberglass outside.

You will have to look up the relative benefits of wood and fiberglass, and decide for yourself.

Because of construction differences between wood and fiberglass windows, there may be small differences in the actual glazing area which may translate to noticeable differences in the energy performance between windows in different lines with the same glass and the same rough dimensions. That is a separate issue from the actual thermal conductivity of different window materials.

Marvins are top-quality windows, but as you note, they may not be the highest performing window, thermally speaking. Keep in mind that you have to both look AT and THROUGH the windows as well as count on them for insulation.

Very important to remember which is not talked a lot is the Air Infiltration. Marvin although good quality and appearance, lack in air tightness. For comparison purposes only, the Serious casement has an A.I. of .03, Thermotech has .08 and Marvin Infinity is .11. The difference is between a Serious DH  is .10 versus the Infinity's .27.  The Serious DH is more air tight than the Marvin casement.... The AAMA minimum standard for A.I is .30

Therefore any gains in energy efficiencies will go right out the window...I couldn't resist.

Yes indeed, window rookie, but who cares when in 7 yrs the suspended film in your precious Serious Window cracks and discolors...

Michaeld

You must have read one of my earlier posts where I mentioned about how I think heat mirror days are numbered.... In Canada, window ratings are a combination of U, SHGC and AI called Energy Ratings or ER . Everyone always mentions the first two and I wanted to bring to the attention the importance of the third, Air Infiltration.

FYI neither of the three companies I mentioned in my previous post above are Energy Star in Canada, there does that make you feel better.

Just curious, are you a Marvin dealer?