Westbrook

  • Description: Overview:

Hedgewood Properties is building a 2,901 square foot, two-story home on a basement foundation that has been designed to have a minimum of 40% savings in total energy use with respect to the Building America Benchmark Version 3.1 (NREL 2003). Construction of the home started in January 2004 and it will be completed in September 2004. The home is located in the Westbrook community, north of Atlanta, in Cummings, Georgia.

Key Partners:

Energy Efficiency Measures:

·         R-30 insulation in attic ·         R-13 (nominal) exterior walls with wet blown cellulose insulation in cavities ·         Foundation with R-5 exterior polystyrene insulation applied directly to interior of walls and R-13 batts within framed wall cavities ·         High performance windows with U=0.35 and SHGC=0.34 ·         Furnace with 93% AFUE and condensing unit with 14 SEER (nominal) rating ·         Integrated dehumidification and mechanical ventilation system ·         Tankless water heater (EF=0.80) and manifold distribution system ·         2.0 kW photovoltaic system ·         Energy efficient lighting Other Features:

Weather Info:

  • Location: Atlanta, GA
  • Elevation: 1033.0
  • Fact: 0.75
  • End Type: No
  • Regional Office: Atlanta
  • Submitted: No
  • Approved: Yes
  • Modified: 2004-07-13
  • Visit: No

Specification 2877

  • Percent Energy Savings: 7
  • Submitted: No
  • Approved: Yes
  • Modified: 2008-05-05 00:00:00
  • Floor Plan: Unknown
  • Roof Radiant: No
  • Wall Radiant: No
  • Space Heating Capacity: 0.0
  • Total Energy Savings: 7.0

Specification 2882

  • Percent Energy Savings: 35
  • Submitted: No
  • Approved: Yes
  • Editor: Brad Oberg
  • Modified: 2005-02-11 00:00:00
  • Model Name: Model
  • Floor Plan: Model Home
  • Style: Single-family detached, site built
  • House Type: Prototype/Research House (G2)
  • Number of Stories: 2.0
  • Number of Bedrooms: 4
  • Floor Area: 2901.0
  • Basement Area: 1419.0
  • Conditioned Volume: 41752.0
  • Surface Area: 4796.0
  • Roof Framing: Vented attic - truss framing
  • Roof Insulation: Sprayed cellulose
  • Roof R Value: 38.0
  • Roof Radiant: Yes
  • Wall Framing: Wood - 2x4 - 16 in o.c.
  • Wall Insulation: Sprayed cellulose
  • Wall R Value: 13.0
  • Wall Sheathing: XPS
  • Wall Sheathing R Value: 3.0
  • Wall Radiant: No
  • Wall Upgrades: XPS insulating sheathing on 50% of exterior wall face.
  • Foundation Type: Conditioned basement
  • Foundation Insulation: Other
  • Foundation R Value: 21.0
  • Slab Insulation: 1.0
  • Foundation Upgrades: R-8 polyisocyanurate foam board insulation on inside face of foundation wall and R-13 spray cellulose within framed wall cavities. 2x6 framed walls have R-19 spray cellulose.
  • Window Glazing: Double pane - low-e
  • Window Framing: Wood
  • Window U Value: 0.34999999404
  • Window SHGC: 0.340000003576
  • Window Glazing Area: 606.0
  • Space Heating Type: Gas furnace
  • Space Heating Combustion: Sealed combustion
  • Space Heating Capacity: 120.0
  • Space Heating Efficiency: 94.0
  • Space Heating Efficiency Type: % AFUE
  • Space Heating Location: Basement
  • Space Heating Energy Proto: 35.0
  • Space Heating Energy: 88.0
  • Space Heating Fuel: Gas
  • Space Heating Upgrades: Single unit.
  • Lighting Energy: 38.0
  • Lighting Energy Proto: 23.0
  • Light Appliance: 112.0
  • Light Appliance Proto: 110.0
  • Renewable Energy Offset: 30.0
  • Cooling Type: Electric Air Conditioner (split system)
  • Cooling Capacity: 5.0
  • Cooling SEER: 14.0
  • Cooling Fuel: Electric
  • Cooling Energy Proto: 28.0
  • Cooling Energy: 57.0
  • Cooling Upgrades: Single unit.
  • Duct Type: Sheet metal / Flex
  • Duct Location: In conditioned space
  • Duct R Value: 6.0
  • Air Distribution Location: Basement
  • Air Distribution Upgrades: Mastic sealant at joints. Three zone system: basement, first and second floors. Second floor system in unconditioned attic space.
  • Air Tight Upgrades: Foam sealants used at penetrations.
  • Vent Type: Controlled supply
  • Vent Control: Thermostat (concurrent with heating/cooling)
  • Vent Capacity: 70.0
  • Vapor Barriers: Foil faced polyisocyanurate foam board insulation at interior side of foundation wall.
  • Drainage Upgrades: Housewrap drainage plane.
  • IAQ Upgrades: Ventilation dehumidifier draws outdoor air.
  • Hot Water Type: Gas - tank
  • Hot Water Combustion: Sealed combustion
  • Hot Water Location: Interior closet
  • Hot Water Efficiency: 0.819999992847
  • Hot Water Energy Proto: 9.0
  • Hot Water Energy: 19.0
  • Hot Water Fuel: Natural Gas
  • Hot Water Upgrades: Two tankless units, each 175 kBtu/hr capacity.
  • Other EE Upgrades: 2 kW photovoltaic system
  • Modeler's Name: John Broniek
  • Other Awards: ALA Health House
  • Benchmark Version: 3.1
  • Total Energy Use: 314.0
  • Total Energy Use Proto: 205.0
  • Percent Energy Savings: 35.0
  • Percent Site Energy: 10.0
  • Total Energy Savings: 44.0

Data and Resources

Additional Info

Field Value
Author Brad Oberg
Maintainer Brad Oberg
Last Updated September 16, 2016, 21:37 (Etc/UTC)
Created September 16, 2016, 21:37 (Etc/UTC)
Construction Type New Construction
Evaluation Level Test House
Climate Mixed - Humid
City Cumming
State GA
Zip Code 99999
Phase Before 2010
Project Start Date 2004-01-05
Project Estimated End Date 2004-09-03
Project Actual End Date 2004-09-03
Completed House Count 1
Expected House Count 1
Energy Savings Percentage 21
Average Estimated Annual Source Energy (MMBtu) 1
Average Conditioned Floor Area (sqft) 1

Dataset extent

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