Written by John Edwards, Arjay’s Window Fashions

For those of you who have been following my articles on Fenestration in Window Covering News, you already know we have discussed some of the basics of how energy moves through glass and how to interpret the strange terms known as The Solar Optical Properties.  Now, I would like you to join me in putting some of this knowledge to use. Our next step is to look at an imaginary window covering case study and apply what we have learned in Fenestration 101.  We will first identify the problem – and then offer some solutions. Let’s go from information to application!

Our Problem Case Study

An office building located in Ventura, California (where we are located), with a very mild climate zone that produces August highs of 73.9 degrees Fahrenheit and December lows of 45.3 degrees Fahrenheit, along with an abundance of clear sky days, has a western elevation that is made up of butt-glazed clear glass double pane windows.  The window mullion is anodized in a dark brown color and the existing window coverings are 1” aluminum mini blinds that match the dark bronze mullion in color.  Your client, the building owner, sets the thermostat at 70 degrees Fahrenheit year round and is complaining of extreme heat in the afternoons on this side of the building; she even says that it gets too hot in the winter time on the west side of the building and she suspects that her windows or her window coverings might be the problem.  She is asking us (you and me) to analyze the situation and come back with some recommendations.  The building owner likes the bronze color of mini blinds because they match the bronze window mullion and if a change is required to solve the problem, she would prefer to stay with something in a dark bronze color.  Now that we have all of the details, let’s get to work on identifying the problem and making some recommendations!

Our Fenestration Observations


The General Solution

The solution to our client’s problem is simple, and we have a number of different products available to us that will have a very positive impact on the comfort and energy efficiency of her building.  We know from studying Fenestration 101 that what we need to do is trick the solar rays and send them back out through the glass in the same way they came in — as short wave radiation (light).  We know that we need to find products with highly reflective surfaces (RS Solar Reflectance) or a low Solar Heat Gain Coefficient (SHGC) that will send the sunlight back out through the glass before it is converted to long wave radiation (heat) where it will be trapped inside the building.

Some Specific Product Suggestions


These are just a few suggestions for our imaginary case study and I am sure that you have some of your own.  If you would like to focus on a case study in your area, real or imaginary, we could discuss different ways of looking at fenestration and window treatment solutions for a building in your part of the country.  I would be happy to list you and your project in the upcoming issue and we could analyze it together in Window Covering News.  That said, I am very interested in hearing from anyone with fenestration questions or suggestions; just contact me at Arjay’s Window Fashions!

Arjay’s Window Fashions is a certified consultation company on fenestration information and teaching you how to save money on your energy bills!. Please call us at 805.642.2300 for more information.

Serving all of Southern California including the greater Los Angeles County, Ventura County, Santa Barbara County and all surrounding areas.

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We’re excited to work with you! After you request a consultation, our team will reach out to schedule the time. One of our Design Consultants can visit you at your location or you can schedule a time to meet with us here at our showroom. Our showroom offers working product samples with all if the various material selections.