Nordeast Nest Project
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The document summarizes the Nordeast Nest, a custom eco home built in Minneapolis, MN from 2012-2014 that incorporates passive house principles and components. It achieved a very low annual heating demand of 32 kWh/m2 through an extremely well insulated and airtight building envelope. Key elements included walls with R-values of R-51 and R-39, a cold roof with R-70 insulation, high performance windows and doors, and an extremely tight air barrier that achieved an airtightness of 0.36 ACH50. HVAC systems included an energy recovery ventilator, air source heat pumps for heating and cooling, and a tankless water heater to provide heating, cooling, ventilation
![Exterior Walls
Below-grade exterior walls: U-value: 0,146 W/(m²K); R-39
- 5/8 "[16mm] drywall
- 11" [280mm] insulated concrete forms (ICF)
[2.5" EPS (035) - 6" concrete - 2.5" EPS (035)]
- 4" [102mm] EPS insulation (035)
- Sto Flexyl
Above-grade exterior walls: U-value: 0,111 W/(m²K); R-51
- 5/8 "[16mm] drywall
- 2X6 Studs [140mm] with mineral wool batt insulation (040)
- 3/4" OSB [19mm] structural sheathing, air barrier, vapor retarder
- 12" I-Joist [305mm] with dense-pack cellulose insulation (039)
- 1/2" [12mm] wood fiberboard sheathing (068)
- Ventilated wood composite siding
Slab
Insulated concrete slab (and footings): U-Value = 0.219 W/(m²K); R-26
- 4” [102 mm] concrete slab
- 6" [152 mm] EPS insulation (035)
Roof
Cold roof, insulated second floor ceiling: U-Value = 0.081 W/(m²K); R-70
- 5/8 "[16mm] drywall
- 2X6 [140mm] framing; service cavity (086)
- 3/4 "[19 mm] OSB air barrier, vapor retarder
- 20 "[508] loose-fill cellulose (042)
- Vented attic
“Nordeast Nest”
Building Envelope Specifications](https://image.slidesharecdn.com/nordeastnestpresentation-150420111304-conversion-gate02/85/Nordeast-Nest-Project-4-320.jpg)
![Window Frames
Optiwin, Alu2Wood
Timber window frame with insulation and exterior aluminum cladding
Uw-Value = 0.84 W/(m2K) [UIP = 0.148 Btu/(h ft² F)]
Glazing
Glas Trösch
SILVERSTAR glaCE
EUROFLOAT
4:/18/4/18/:4
Argon filled
Ug-Value = 0.54 W/(m2K) [UIP = 0.095 Btu/(h ft² F)]
g-Value (SHGC) = 53 %
Entry Doors
Doors of Distinction
Custom made entry door. Wood frame, wood finish, polyisocyanurate foam insulation core
Ud-Value = 0.79 W/(m2K) [UIP = 0.139 Btu/(h ft² F)]
“Nordeast Nest”
Building Envelope Specifications](https://image.slidesharecdn.com/nordeastnestpresentation-150420111304-conversion-gate02/85/Nordeast-Nest-Project-5-320.jpg)
![Annual Heating Demand
32 kWh /(m2a ) [10 kBTU/(sf yr)]
Heat Load
18 W/m2 [5.7 Btu/h/ft²]
Design Heat Load
4 KW [13.8 kBTU/h]
Site Energy Demand
44 kWh /(m2a ) [14 kBTU/(sf yr)] = 9,700 kWh/ a
Source Energy Demand
101 kWh /(m2a ) [32 kBTU/ (sf yr)] for Heating, Domestic Hot Water, Auxiliary- and Plug Loads
Will be much less in reality as electricity is sourced from wind power.
Calculated with the PHPP
“Nordeast Nest”
Modeled Performance](https://image.slidesharecdn.com/nordeastnestpresentation-150420111304-conversion-gate02/85/Nordeast-Nest-Project-6-320.jpg)
Nordeast Nest Project
- 1. Nordeast Nest Low Energy Home with Passive House Components
- 2. “Nordeast Nest” Custom Eco Home | Minneapolis, MN | 2012 - 2014 Finished Size 2,700 sf + garage and porch Construction Cost $195/fsf Client Private Performance Low Energy Home with Passive House Components
- 3. “Nordeast Nest” Project Team Architecture TE Studio Interior Design InUnison Design Structural Engineering Bunkers and Associates General Contracting RJ Stegora, Inc.
- 4. Exterior Walls Below-grade exterior walls: U-value: 0,146 W/(m²K); R-39 - 5/8 "[16mm] drywall - 11" [280mm] insulated concrete forms (ICF) [2.5" EPS (035) - 6" concrete - 2.5" EPS (035)] - 4" [102mm] EPS insulation (035) - Sto Flexyl Above-grade exterior walls: U-value: 0,111 W/(m²K); R-51 - 5/8 "[16mm] drywall - 2X6 Studs [140mm] with mineral wool batt insulation (040) - 3/4" OSB [19mm] structural sheathing, air barrier, vapor retarder - 12" I-Joist [305mm] with dense-pack cellulose insulation (039) - 1/2" [12mm] wood fiberboard sheathing (068) - Ventilated wood composite siding Slab Insulated concrete slab (and footings): U-Value = 0.219 W/(m²K); R-26 - 4” [102 mm] concrete slab - 6" [152 mm] EPS insulation (035) Roof Cold roof, insulated second floor ceiling: U-Value = 0.081 W/(m²K); R-70 - 5/8 "[16mm] drywall - 2X6 [140mm] framing; service cavity (086) - 3/4 "[19 mm] OSB air barrier, vapor retarder - 20 "[508] loose-fill cellulose (042) - Vented attic “Nordeast Nest” Building Envelope Specifications
- 5. Window Frames Optiwin, Alu2Wood Timber window frame with insulation and exterior aluminum cladding Uw-Value = 0.84 W/(m2K) [UIP = 0.148 Btu/(h ft² F)] Glazing Glas Trösch SILVERSTAR glaCE EUROFLOAT 4:/18/4/18/:4 Argon filled Ug-Value = 0.54 W/(m2K) [UIP = 0.095 Btu/(h ft² F)] g-Value (SHGC) = 53 % Entry Doors Doors of Distinction Custom made entry door. Wood frame, wood finish, polyisocyanurate foam insulation core Ud-Value = 0.79 W/(m2K) [UIP = 0.139 Btu/(h ft² F)] “Nordeast Nest” Building Envelope Specifications
- 6. Annual Heating Demand 32 kWh /(m2a ) [10 kBTU/(sf yr)] Heat Load 18 W/m2 [5.7 Btu/h/ft²] Design Heat Load 4 KW [13.8 kBTU/h] Site Energy Demand 44 kWh /(m2a ) [14 kBTU/(sf yr)] = 9,700 kWh/ a Source Energy Demand 101 kWh /(m2a ) [32 kBTU/ (sf yr)] for Heating, Domestic Hot Water, Auxiliary- and Plug Loads Will be much less in reality as electricity is sourced from wind power. Calculated with the PHPP “Nordeast Nest” Modeled Performance
- 8. Passivhaus - Passive House “A rigorous, voluntary building energy standard focusing on highest energy efficiency and quality of life at low operating cost.” The Passive House Standard is the most rigorous building energy standard in the world. Consultants, projects or building components that have obtained the right to carry the logo have committed themselves to design excellence and the Passive House energy performance criteria.
- 9. • Conservation first • Minimize losses • Maximize gains Basic Concept
- 10. Active vs. Passive Passive: 4.75 kBtu/(sf yr)Active: 25-125 kBtu/(sf yr) 85 - 450 kWh/(m2 a), typically found in the U.S. 15kWh/(m2 a), maximum target Source: Krapmeier & Drössler 2001
- 11. Energy Footprint Heating (active) Hot water (active) Cooling (active) Household Electricity Heat & hot water (passive) ➡ up to90% less heating energy ➡ up to 66% less total energy Code Passive House
- 12. Key Benefits
- 13. Comfort
- 15. Image Source: dreamstime.com Ecology and Resource Efficiency
- 16. The Project
- 17. Design Concept
- 18. Built Project
- 35. Construction Process from Demolition to Completion
- 36. Before
- 55. HVAC Systems
- 56. Ventilation Zehnder, ComfoAir 350 (84% efficiency) Zehnder distribution system Effective heat recovery efficiency = 76% Heating, Cooling, Dehumidification 2 recirculating Fujitsu split air-to-air heat pump systems (first floor and second floor) with electric resistance backup post heater; system also provides cooling and dehumidification; sheet metal ductwork Mantis gas fireplace; direct vent; modulating: can augment heating on coldest days of the year; will be used throughout the winter for enjoyment. Electric resistance panel heaters (basement) Domestic Hot Water Boiler, IntelliHot i-200P tankless on-demand gas hot water heater with continuously insulated PEX tube distribution “Nordeast Nest” HVAC Systems
- 62. Thank You! Holistic Design for Sustainable Homes testudio.com