Detailed specifications


General attributes

Attribute Value Comments
Location Amherst, MA

Architect GO Logic

Builder Integrity Development and Construction

Bedrooms
3

Bathrooms
1.5

Space 1300 sq ft External walls
Space 1000 sq ft Passive House 
Certification Passive House Academy In progress
Blower door test 0.34 ach 50 Pa

Square Footage

Living space only, excluding stairs and storage
Space Square feet
Main living
480
1/2 bath
23
Upstairs hall
84
Study
98
Master bed
136
Guest bed
108
Bath
53
Interior total
982

Exterior

Item Type Comments
Walls 8" SIPs + 6" stud SIPs from Branch River
Windows Triple pane, tilt and turn Kneer-S├╝dfenster
Siding Fiber cement CertainTeed
Roof Standing seam metal Englert, 24 gauge

Interior

Item Type Comments
1st floor flooring Concrete slab Power troweled and treated with a densifier
2nd floor flooring White Pine Square edge 10”
Paint Low VOC Benjamin Moore Natura
Kitchen IKEA Applad
Countertops Wood Maple

Insulation


Type R value % Area
Walls 8” EPS foam + 5” blown-in fiberglass
50
46.2%
Windows Triple pane
6
10.4%
Door Triple pane
5
0.9%
Roof 2’ Loose fill cellulose
100
19.3%
Foundation (under) 10” EPS foam
25
18.1%
Foundation (side, above ground) 8” EPS foam
30
3.0%
Foundation (side, below ground) 8” EPS foam
35
2.0%
Weighted average

49.3
100.0%

Energy usage

Energy usage   Value   Comments 
Lights, appliances, and electronics  5.2 kWh/d  
50%
Hot water  3.2 kWh/d  
31%
Heating  1.7 kWh/d  
17%
Air conditioning  0.2 kWh/d 
2%
Daily average  10.4 kWh/d  All electric, estimated by PHPP*
Annual  3781 kWh/a  All electric, estimated by PHPP*
Supply  2 kW PV system  Provides 100% of energy usage 

Appliances

Fixture Brand Model Price
Dishwasher Miele G4225SC Futura Classic Dishwasher Prefinished (White)
$999
Cooktop Miele KM5753 Induction Cooktop
$2,499
Oven Miele DGC6800XLBRWS Convection Steam White
$3,899
Range hood Vent-a-hood CWEAH6-K30 250 CFM 30" Wall Mounted Duct-Free Air Recovery System (ARS)
$2,124
Washer Miele W3038 Lotus White Large Capacity
$1,999
Dyer Miele Heat pump, not available in US

Total


$11,520

Hot water

Item Model Min gpm Max gpm
Shower, washer Stiebel Eltron Tempra 15
0.58
2.5 (40F)
Kitchen sink, dishwasher Stiebel Eltron DCH 8-2
0.58
1.5 (33F)
1/2 bath sink Stiebel Eltron Mini 4
0.4
1 (24F)
Bath sink 1
Bath sink 2
Heat recover drain pipe Renewability (3”x6’)



HVAC


Model Efficiency Comments
HRV Zehnder ComfoAir 200
95%
29 to 118 CFM
Heat pump outdoor unit Fujitsu AOU18RLX
344%
HSFP=9.3 Btu/Wh
SEER=18 Btu/Wh
Heat pump indoor unit (x2) Fujitsu ASU9RLS2

Financial information

Construction costs, all inclusive
Item Cost Cost per sq ft
Net construction
$175,397
$135
Architect fees
$50,000
$38
Driveway & excavation
$48,350
$37
Windows
$22,948
$18
SIPs, EPS foam
$22,140
$17
Heat pump & HRV
$19,224
$15
Appliances
$11,846
$9
Concrete slab
$9,490
$7
Passive House certification
$6,000
$5
Standing seam roof
$7,000
$5
Countertops & cabinets
$4,104
$3
Tankless water heaters
$4,000
$3
Plumbing fixtures
$3,870
$3
Electric utility fee
$3,406
$3
Permits
$2,500
$2
HERS rating
$2,000
$2
Energy monitor
$1,716
$1
Lighting fixtures
$1,031
$1
LED light bulbs
$500
$0
Temperature, Voc sensors
$499
$0
Total
$396,021
$305


Construction costs, construction only 

Item Cost Cost per sq ft
Net construction
$175,397
$135
Windows
$22,948
$18
SIPs, EPS foam
$22,140
$17
Heat pump & HRV
$19,224
$15
Concrete slab
$9,490
$7
Standing seam roof
$7,000
$5
Countertops & cabinets
$4,104
$3
Tankless water heaters
$4,000
$3
Plumbing fixtures
$3,870
$3
Lighting fixtures
$1,031
$1
Total
$269,204
$207