Energy Efficiency for Homeowners

Friedman Case Study: Cold Climate Air Source Heat Pump (ccASHP) System 

03-30-2021 15:11



Bonnie Friedman and David Merfeld’s historic home in Belmont, Massachusetts is perched high on Belmont Hill, accessible from a steep, single-lane, winding private road adjacent to Belmont Center. Built in 1890, the sprawling 4,700 square foot home is visually stunning both inside and out. The large, open living areas are filled with colorful art and sculptures from the homeowners’ many travels, giving the home a charming, eclectic character. The sizable, one-acre lot lends a secluded ambiance to the property, which features walking paths, an enormous (1,768 square foot) wrap-around deck with outdoor kitchen and covered dining area, a treehouse with wood storage, and a large composting area. Perhaps surprisingly given its age and size, the home is exclusively heated and cooled with three centrally-ducted air source heat pump (ASHP) systems and one ductless mini-split ASHP system.

The main part of the home was built in 1890, with two additions completed before Bonnie and David purchased the home in 2002: one in 1948 to add a private suite/in-law apartment, garage and driveway, and another in 1964 to expand the living area. When Bonnie and David purchased the home, it had two fuel oil forced air furnace HVAC systems servicing the original footprint and the 1964 addition, while the 1948 apartment addition was heated with electric resistance units.

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