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EcoVillage town homes
built with
green features
The following building characteristics for the Cleveland
EcoVillage Town homes were developed by the development's architects,
Boston-based Building Science Corp. The following features of the town
homes' green building system, developed by the Building
America program, are compared and contrasted to standard construction
materials and energy performance.
Building America Standard
comparison
Building Envelope
Ceiling:
R-38 R-30
(loose fill)
Walls:
R-19: 24 oc+ R-5 XPS ext. R-13
2x4 10 oc with OSB
@brick & siding sheathing
R-19: 24 oc + R-8 2" EPS
exterior @stucco
Band joists:
R-19: 24 oc + R-5 XPS/R-8 2" R-13
EPS exterior
Foundation:
R-10: 2" XPS on basement walls Uninsulated
basement
With GWB. 2x3 framing, assume walls
no cavity insulation. R-4 3/4"
XPS on basement to slab wall
Slab:
R-8: 2" EPS under entire slab R-5:
1" XPS
Depressed patios:
R-10: 2" XPS 4' wide frost
protection
Windows:
Double-glazed low emissivity Double-glazed
clear
wood frame glass
wood frame
(vinyl clad) U=.36, SHGC=.45 (vinyl
clad) U=.46, SHGC=.57
Infiltration:
2.5 sq in leakage area 8.0
ACH 50
per 100 sf envelope
Mechanical systems
Heat:
90%+ AFUE sealed combustion 80%
AFUE conventional
furnace in conditioned space furnace
in cond. space
Cooling:
12 SEER air conditioner split 10
SEER air conditioner
system split
system
DHW:
.59 EF power-direct vent .56
EF natural draft
water heater (40 gallon) water
heater (40 gal.)
Ducts:
In conditioned space; insulated In
conditioned space
(as per code)
Duct leakage:
None to outside (5% or less) 10%
to outside
Ventilation:
AirCycler supply-only system None
integrated with AHU (return side)
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EcoCity Cleveland
3500 Lorain Avenue, Suite 301, Cleveland OH 44113
Cuyahoga Bioregion
(216) 961-5020
www.ecocitycleveland.org
Copyright 2002-2005
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