The hottest building standard on the block, Passive House, moves to the realm of student housing in a new residence hall at Unity College called TerraHaus. TerraHaus is expected to be the first student residence in the country with Passive House certification and will house 10 students.
TerraHaus was designed by Gâ€¢O Logic, the same firm that built a red Passive House prototype in Maine. The design calls for nearly airtight construction, SIPS walls (with neopor), heat recovery ventilation, German-windows from EGE Fenstern und Turen, and a glycol solar hot water system with evacuated tubes.
The landscape is designed by Ann Kearsley Design and includes a mixture of pervious and impervious pavements and plantings. Kearsley’s scheme covers not just TerraHaus but two future buildings for a residential village being called SonnenHaus.
Though energy costs should hover below $300 per year, the build cost was about $470,000, according to Bangor Daily News. That pencils out to $235 per square foot based on the 2,000 square feet.
If you recall, Unity College also has a net-zero prefab by Bensonwood Homes. The LEED Platinum project includes solar PV, air-lock entry, a geothermal heat pump system, and recycled materials.