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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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