Our first National Grid DER is in the home stretch and all the bells and whistles are being finished. This project has been a “test kitchen” for owner Brian Butler.
The “Philly-Style” split has some of the coolest products out today. This once aluminum and asphalt wrapped dwelling now has 5” of Tuff-R rigid insulation under the James Hardie Pre-Finished clapboard, illustrated by the before and after photo.
The “tuned” Windows range from heat-gain ThermoTech models on the south to German Schuco on the north; some are casements and others are Tilt-n-Turns. The Doors are from Architectural Openings in Somerville and are equipped with rugged (6) point locking system and premium air-tight gasketing.
Most think of the sexiest room of the house to be the Kitchen or Master Bathroom. Whilethe project has some gorgeous finishes, the real story is the technology and techniques used behind the scenes.
The air leakage rate of the shell has reduced 84% from the baseline test ! The insulating R value of the walls (R-57) and roof/ceiling (R-60) are more than triple the original conditions, and as a result the mechanical systems are quite small for a relatively large house (about a half of the original output BTU capacity). Finally, the +90% efficient Zehnder HRV provides superior air quality to a home that is now more than 6 times tighter than it was…!
Cold uncomfortable drafts and dry sinus in the winter, miserably hot stuffy summers with noisy window air conditioners are all distant memories now…!