Contractor

Name : Tanner Construction

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

Construction Manager

Name : TE Studio, Ltd.

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

Stakeholders

Function : Structures calculist

Align Structural
Rick Johnson

Function : Manufacturer

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

Function : Environmental consultancy

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

Contracting method

General Contractor

Owner approach of sustainability

Maximize efficiency with the help of Passive House. Fuel responsibly with wind and solar energy. Use people and earth friendly products throughout. 

Architectural description

The Good Energy Haus is a detached single family home on an urban infill lot in Minneapolis, MN. It offers 4 bedrooms and 3 bathrooms on two floors. A basement was omitted to save on space and cost. The attached garage serves as overflow space for storage and hobbies. It is ventilated and conditioned. 

The house is oriented perfectly south to maximize passive and active solar heat gains. The rear of the home opens up to engage with the backyard, offering views, light and the enjoyment of the outside in a climate zone with a long winter.

The first floor is accessisble with a bath and bedroom for aging in place. All entrances are zero-step. 

The second floor holds a master suite and two bedrooms with one bath, as well as the laundry room. 

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

• Final Energy : -7,87 kWhfe/m².year
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

More information :

Energy monitoring started 12/ 2020 and is in process.

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. 

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

GHG emissions

• GHG in use : -12,00 KgCO₂/m²/year

Methodology used : PHPP

Indoor Air quality

Monitoring with AirThings system.

Health & Comfort

Measured indoor CO2 concentration : 628 ppm

Urban environment

Infill lot in Minneapolis, MN

Land plot area

1 000,00 m²

Built-up area

27,00 %