Great Glazing: Wolverine Enclosures Office Building

The basics: Looking to reduce solar heat gain and interior glare at their nine-year-old, 7,500-square-foot office in Allegan, Mich., management of Wolverine Enclosures began researching window replacement options. The group considered permanently tinted glass, but instead replaced all 15 windows with new double-pane insulating glass units featuring a thermochromic interlayer.

“The primary reason we went with the interlayer...was to allow more light into the office on cloudy days," said Larry Krause, general manager for Wolverine Enclosures, in a Pleotint release. "It allowed us to go with darker tint for full sun than we would have chosen with fixed tinting.”

The players: Owner, Wolverine Enclosures Inc.; glass manufacturer, PPG Industries; glass fabricator, Thompson I.G.; interlayer manufacturer, Pleotint; contract glazier, Grand Valley Glass

The glass and systems: Thompson I.G. laminated 15 IGUs, approximately 500 square feet, and fabricated them with Pleotint’s Suntuitive interlayer. The exterior laminate features 1/4-inch tempered PPG Azuria glass, the Suntuitive interlayer, and 3/16-inch tempered clear glass. The interior lite is 3/16-inch PPG Solarban 70XL low-emissivity coated glass.

The Suntuitive interlayer is a thermochromic glazing technology that gradually darkens in response to rising temperatures caused by direct sunlight, then cools as the sun moves across the sky, returning to a clear, neutral state in cloudy or dark conditions, without mechanical or electrical intervention. Wolverine employees say morning heat gain has been reduced by 10 to 15 degrees on average, reducing the use of air conditioning and creating a more consistent interior environment throughout the day, according the release.