Boston's Castle Square Apartments achieves 72% energy reduction after retrofit
Earlier this year, Castle Square Apartments in Boston completed a deep energy retrofit after a complex renovation process that lasted two years. A deep energy retrofit is defined as a renovation with energy savings greater than 50%, but the retrofit work at Castle Square Apartments reaped a whopping 72% energy usage reduction. The retrofit, which cost more than $8 million, included a 'five-inch super insulated shell,' an insulated reflective roof, high-efficiency windows, and extensive air sealing.