RetroWAL™ Maximizes Savings
Everyone wants to cut energy costs, but most energy system upgrades don’t provide an attractive ROI. RetroWAL™ is an interior window retrofit that makes improving your building’s energy performance financially viable. By eliminating the need to remove and replace any actual glass, the RetroWAL™ system can be installed at a fraction of the cost of traditional energy upgrades like replacement windows and high performance HVAC systems. In fact, RetroWAL™ is one of the only energy solutions available for curtain wall, storefront and window wall buildings that provides an ROI in just five years.
RetroWAL™ Upgrades Energy Efficiency
One of the greatest contributors to energy consumption in curtainwall buildings – especially those with large window-to-wall ratios – is poor insulation. Studies show that glass contributes to 50% of the total building load in cold climates. Via modeling software developed by the U.S. Department of Energy, RetroWAL™ has been proven to reduce annual energy consumption by an average of 20%, increasing the existing glass R value by 300% and 500%, depending on the selected system.
RetroWAL™ Improves Comfort
RetroWAL™ not only significantly improves energy performance, but also increases comfort for tenants and building occupants. Older glass façade buildings often have laboring HVAC systems and leaky windows, which results in hot and cold spots. RetroWAL™ improves thermal comfort by eliminating the need for sweaters and space heaters without having to install costly system upgrades. RetroWAL™ also is an ideal sound control solution for office buildings, hotels, colleges and universities located near airports, train stations and busy highways. The RetroWAL™ system reduces external noise by up to 90% and achieves a Sound Transmission Class (STC) rating of 49 and an Outdoor-Indoor Transmission Class (OITC) rating of 40.
RetroWAL™ Meets Historic Preservation Guidelines
The National Park Service, under direction from the Department of the Interior, sets the guidelines for historic buildings. RetroWAL™ easily meets all historic preservation guidelines, which can be one of the biggest challenges when it comes to improving the energy efficiency of protected historic buildings. In fact, the RetroWAL™ system is currently installed in the Department of the Interior. Since RetroWAL™ installs on the interior of the building, it doesn’t affect the exterior of the facade. No sight lines are altered on the inside, and custom aluminum extrusions are made to match the existing window sash, sills and crown molding in the rooms. For historic curtainwall buildings, no mechanical fasteners are used to attach the window frame to the existing aluminum.