Introduction Multifamily buildings use energy in a wide variety of ways throughout the day, from air conditioning and domestic hot water (DHW) to cooking, lighting, and plug loads. Energy use...
Introduction Multifamily buildings often present complex energy management challenges due to varied tenant behavior, diverse appliance use, and unit-by-unit load variability. While energy management...
What is the Measure? Domestic hot water (DHW) systems often account for a significant share of a building’s total energy use. While equipment efficiency, such as that of water heaters, is frequently...
Introduction to Heat Pump Water Heating with High-Performance Distribution Systems Water plays a vital role in nearly every building type, supporting a wide range of critical human, mechanical, and...
What Is Drain and Wastewater Heat Recovery? Everyday activities like showering, using sinks, and washing laundry demand a significant amount of hot water use. After these tasks are complete, the...
What Is Drain and Wastewater Heat Recovery? Water is used extensively in daily life—whether in homes, businesses, or industrial settings—for activities such as showering, washing dishes, and...
What is a geothermal system? Geothermal systems utilize electric heat pumps to harness the ground as both an energy source and sink. During winter, these systems absorb heat from the ground to warm...
What are Air-to-Water Heat Pump Pool Heating Technologies? Air-to-water heat pump pool and spa heating technology utilizes ambient air to heat pool and spa water efficiently, significantly reducing...
What Is the Measure? Air-to-water heat pump water heaters (HPWHs) represent the latest breakthrough in pool and spa heating technology. These innovative systems mark a significant leap forward in...
To ensure optimal system performance, special attention must be given to the design of high-performance opaque building envelope. Building envelope technologies account for approximately 30% of the...
What Is an Opaque Building Envelope? A building’s opaque envelope encompasses all elements of the building envelope except for windows, including walls, roofs, and foundations. These factors form...
Introduction to Semi-Central Heat Pump Water Heaters (HPWHs) In response to reducing emissions and our reliance on fossil fuels, designers and developers are increasingly moving from traditional...
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