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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