Contractor

Name : Tanner Construction

Contact : Seth Tanner, seth[a]tannerconstructionllc.com, Watertown, MN, USA

 http://www.tannerconstructionllc.com

Construction Manager

Name : TE Studio, Ltd.

Contact : Tim Eian, tim[a]testudio.com, Minneapolis, MN, USA

 http://www.testudio.com

Stakeholders

Function : Structures calculist

Align Structural

Rick Johnson

 http://www.alignstructural.com

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Function : Manufacturer

Tanner Windows

Stephan Tanner, stephan[a]tannerwindows.com, Watertown, MN, USA

 http://tannerwindows.com

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Function : Environmental consultancy

Herz & Lang

Raphaël Vibert, raphael.vibert[a]herz-lang.de, Weitnau, Germany

 https://www.herz-lang.de

Contracting method

General Contractor

Type of market

Realization

If you had to do it again?

Slab on grade concrete pour was too uneven for polishing. Ended up having to pour self leveler and install cork flooring. Would use a specialized concrete contractor in future and/or set slab at lower elevation and utilize self-leveling overpour as standard. Open living area sound is lively. Would utilize more sound-absorbing materials in future.

Building users opinion

Comfort is tremendous on sunny, cold days. Like a higher set point on cloudy, cold days. Air quality is stellar (is monitored 24/7). Illumination is wonderful (lots of daylight = need very little artificial light).

Energy consumption

• Primary energy need : 15,79 kWhpe/m².year
• Primary energy need for standard building : 47,34 kWhpe/m².year

Calculation method : Other

CEEB : 0.0001

Breakdown for energy consumption : Heating: 8.3 kWh/ m2 aCooling: 3.5 kWh/ m2 aHot water: 10.2 kWh/ m2 aHousehold electricity 8.8 kWh/ m2 a

Envelope performance

• Envelope U-Value : 0,19 W.m^-2.K^-1
More information :

WOOD WALL
5/8" (16mm) drywall
7-1/4" (184mm) dense-pack cellulose insulation and 2x8 framing [0.039]
1/2" (13mm) OSB sheathing
9-1/2" (241mm) dense-pack cellulose insulation and I-Joists [0.039]
1/2" (13mm) wood fiberboard sheathing [0.055]

VENTILATED SIDING
U = 0.101
U-Wert = 0.095 W/(m2K)

SLAB
4" (102mm)polished concrete slab
8" (153mm) EPS [0.039]
U-Wert = 0.184 W/(m²K)

ROOF
Low sloped hot roof
5/8" (16 mm) drywall
5-1/2" (140mm) 457 service cavity
18" (457mm) dense-pack cellulose and trusses [0.040]
3/4" (19mm) plywood
average 2-1/2" (64mm) polyisocyanurate tapered insulation [0.035]
U-Wert = 0.079 W/(m2K)

WINDOW FRAMES
Tanner Windows, Lauda Premium
Wood frame exterior aluminum cladding
Tanner Lauda Premium frame: Uf = 0.81
U w-Wert = 0.68 W/(m²K)

GLAZING
Saint Gobin glazing: Ug = 0.53/ g = 0.545
Swiss Spacer
U g-Wert = 0.53 W/(m2K)
g -Wert = 545 %

SHADING
Hella Raffstores, Loxone MiniServer automation
ENTRY DOOR Tanner Windows Entry Door (= Tanner window)
Local fire-protection doorU d-Wert = 0.8 W/(m2K)

• Building Compactness Coefficient : 0,34

Indicator : n50

• Air Tightness Value : 0,22

Users' control system opinion :

Shades are automated with an interior temperature sensor and a roof mounted weather station. They can be manually overriden by occupants with an app. 

More information

Energy monitoring started 12/ 2020 and is in process.

Real final energy consumption

Final Energy : -7,87 kWhfe/m².year

Systems

Heating system :
• Heat pump
Hot water system :
• Heat pump
Cooling system :
• VRV Syst. (Variable refrigerant Volume)
Ventilation system :
• Double flow heat exchanger
Renewable systems :
• Solar photovoltaic
• Renewable energy production : 100,00 %
Solutions enhancing nature free gains :

Wastewater heat recovery unit

Smart Building

BMS :

Automated exterior shades

Urban environment

Infill lot in Minneapolis, MN

• Land plot area : 1 000,00 m²
• Built-up area : 27,00 %

Indoor Air quality

Monitoring with AirThings system.

Comfort

Measured indoor CO2 concentration :

628 ppm

GHG emissions

• GHG in use : -12,00 KgCO₂/m²/year
Methodology used :

PHPP