There’s a huge influx of people coming in, and the developers are always looking for ways to differentiate the products they’re offering. The Seattle apartment market is really competitive. Wechsler, AIA, LEED AP, principal, Runberg Architecture Group PLLC, Seattle, said, “It’s also great to have the ability to cool. And we’d worked with ductless heat pumps before, so we knew the technology works.” There’s really not any other way to deliver cooling close to this cost other than packaged terminal heat pumps, but those don’t deliver on performance. So ultimately, the selection was about performance and control. Our target was very aggressive – an average EUI of about 24. When we looked at Energy Use Intensity (EUI), we saw that the typical Seattle building at the time had an EUI of about 40. We wanted to achieve a 60 percent reduction in energy use compared to the regional baseline. Why zoned technology and VRF? Heller said, “Beyond the desire to be able to market cooling with some of the apartments, the desire to use ductless heat pumps was driven by this idea that the project was designed to hit energy-efficiency targets. So only apartment units facing south and west were selected to receive ductless heat pumps, as these apartments were going to get hot, and so have the highest seasonal cooling loads.” “Traditionally, the Seattle climate has not necessitated cooling. He explained why only 40 percent of the apartment units were designed to have cooling and heating systems. Jon Heller, PE, president, Ecotope, Inc., Seattle, was hired to provide HVAC and plumbing engineering services, energy efficiency consulting and energy performance modeling. The remaining one-quarter was an adaptive reuse of a laundry facility built in 1907, which was turned into a 39,000-square-foot building with commercial tenants. None of that would have been possible without Variable Refrigerant Flow (VRF) systems from Mitsubishi Electric.Īpproximately three-quarters of the Stack House development was new construction resulting in two mid-rise multifamily facilities – one with 96 apartments across 96,000 square feet, the other 188 apartments across 198,000 square feet. To name just one: LEED ® Platinum certification. The development has won multiple certifications and recognitions for its innovative, energy-efficient design, as well as its actual performance. The project’s three buildings cover an entire city block, offering market rate residential apartments and mixed-use spaces including offices, a restaurant and a gym. The Stack House Apartments (Stack House) is a development located in Seattle’s fast-growing South Lake Union neighborhood. Quick-selling rental units and multiple recognitions, including LEED ® Platinum certification Mitsubishi Electric CITY MULTI ® Variable Refrigerant Flow (VRF) Systems Selecting an HVAC system efficient enough to meet rigorous energy efficiency standards and versatile enough to be used throughout a variety of spaces Keep up to date with the latest news and company updates. Look beyond traditional HVAC solutions and make comfort personal. Your source for the latest industry trends and stories of real-life applications of our products. Whether you are looking for more information regarding our systems, or searching for resources on how to make your space more comfortable, healthy or efficient - we have you covered.Įxplore how our systems work or get inspired with our success stories. Our white papers offer comprehensive information about VRF technology to help building professionals learn more about this incredibly efficient and flexible HVAC technology. Our heating and air conditioning products have enriched the lives of thousands of customers across North America. The Inflation Reduction Act of 2022 (IRA) is the largest ever climate investment by the Federal Government in American history.
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