Guilford Sound Artists' Residence
Walls and Roof
Subslab assembly |
6" XPS insulation under concrete slab and 2" rockwool board above slab. |
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Subslab R-value | 38.0 |
Slab edge assembly |
9" XPS insulation outbound of concrete foundation wall |
Slab edge R-value | 60.0 |
Foundation wall assembly |
9" XPS insulation outbound of concrete foundation wall |
Foundation wall R-value | 60.0 |
Above grade wall assembly |
Double wood frame wall with 2x6 interior structural wall with blown in cellulose in cavities, and a second layer (staggered framing) of 9 1/2" TJI framing also filled with cellulose insulation. Exterior corten steel rainscreen over sheathing over weather barrier. |
Above grade wall R-value | 53.0 |
Flat attic assembly |
extensive green rood assembly |
Roof R-value | 90.0 |
Windows and Doors
Window Assembly:
Bieber Fineline Aluminum clad wood windows for passive house
Door Assembly:
All exterior doors glazed french doors:
Bieber Fineline Aluminum clad wood doors fir passive house
Average window U-factor | 0.15 |
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Solar Heat Gain Coefficient | 0.50 |
Visible Light Transmittance | 0.72 |
Door U-Factor | 0.16 |
Door Area | 164 sq ft |
Mechanical Systems
Space cooling - Manufacturer & Model | Carrier Infinity 25 VNA 2 Ton Unit Series 36-30 with Variable Speed Fan Coil Unit Model: FE4A (bedrooms), Carrier Infinity 25 VNA 3 Ton Unit Series 24-30 with Variable Speed Fan Coil Unit Model: FE4A (common spaces) |
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Space cooling - capacity | 7 kW, 10 kW |
Space heating - Manufacturer & Model | Combined space heating and domestic hot water heating, Alpine #ALP150B, 136,000 BTU Output Condensing Boiler, Gas fired hydronic distribution,, Hot Water Tank for combined heat storage, HTP SSU-119, 119 Gal, |
Space heating - capacity | 40 kW |
Domestic hot water - Manufacturer & Model | Combined space heating and domestic hot water heating, Alpine #ALP150B, 136,000 BTU Output Condensing Boiler, Gas fired hydronic distribution, |
Domestic hot water - capacity | 119 gal |
Domestic hot water - efficiency | 95 kW |
Ventilation - Manufacturer & Model | Zehnder ComfoAir 200 (2x), 118 cfm, 95% heat recovery, 143 Watt (max) |
Lighting Manufacturer and Model | |
Lighting Efficiency | |
Mechanical Equipment Installation Details and Comments |
HVAC Equipment & Controls Three HRV air exchange and cooling air ducts run in separate duct lines but are supplied to the spaces in a combined manifold. Balancing the airflow and conditioning supply is easy, while avoiding grill clutter in the rooms. The return air is exhausted from the bathrooms, the laundry room, and kitchen and returned to the HRV. All exhaust air is passed by the HRV where the incoming air is filtered and preconditioned. The dryers are non-vented heat pump dryers and therefore reduce the amount of moisture added to the interior to a minimum. Energy Management Practice With a focus on user friendliness for the frequently changing inhabitants of the artists’ residence, space conditioning is simple as possible while maintaining a high level of efficiency. The base level air exchange provides a healthy and comfortable air supply and maintains a stable temperature day and night. All bedrooms and common spaces have thermostats where individual space conditioning requirements can be easily programmed. Lighting: Indoor and Outdoor Lighting, Controls Plenty of daylight is provided through large windows in the entry and common areas, a generous clerestory window over the main hallway continues the natural light distribution to the private quarters where even interior bathrooms receive natural light through translucent glass panels from the bedroom. All artificial lighting is supplied by high efficient LED or fluorescent lamps to maintain the overall primary energy consumption within the range of 38.0 kBTU/(ft2yr) for all energy used, including domestic appliance and lighting loads as prescribed by the Passive House standard. |
Envelope
Air Changes per hour, ACH50 | 0.34 ACH50 |
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Air Changes per hour, CFM50 | 407.00 |