Stillwater Ranch

  • Description: Cathedralized, sealed attic assembly; high efficiency heating and cooling system; tank-less natural gas water heater; low-density spray foam insulation in walls and roof; high efficiency lighting package; low SHGC windows; Energy Star appliances.
  • End Type: No
  • Submitted: Yes
  • Approved: No
  • Modified: 2011-06-24
  • Visit: No

Specification 4575

  • Percent Energy Savings: 7
  • Submitted: No
  • Approved: No
  • Floor Plan: Unknown

Specification 4576

  • Percent Energy Savings: 0
  • Submitted: No
  • Approved: No
  • Editor: Ari Rapport
  • Modified: 2010-04-20 00:00:00
  • Model Name: Truman
  • Floor Plan: 1835
  • Style: Single-family attached, site built
  • Number of Stories: 1.0
  • Number of Bedrooms: 3
  • Floor Area: 1858.0
  • Conditioned Volume: 23221.0
  • Surface Area: 6582.0
  • Roof Framing: Cathedral
  • Roof Insulation: Spray Foam
  • Roof R Value: 19.0
  • Roof Radiant: No
  • Roof Upgrades: From R-30 blown cellulose in a full, vented attic with a radiant barrier, to R-19 low-density spray foam insulation in a cathedralized, sealed attic.
  • Wall Framing: Wood - 2x4 - 16 in o.c.
  • Wall Insulation: Spray Foam
  • Wall R Value: 13.0
  • Wall Sheathing: Other
  • Wall Radiant: No
  • Wall Upgrades: From R-13 blown cellulose to R-13 low-density spray foam insulation.
  • Foundation Type: Slab on grade
  • Foundation Insulation: None
  • Foundation Upgrades: None
  • Window Glazing: Double pane - low-e - argon filled
  • Window Framing: Vinyl
  • Window U Value: 0.360000014305
  • Window SHGC: 0.289999991655
  • Window Glazing Area: 244.0
  • Window Upgrades: From an aluminum frame window with U-value of 0.48 and SHGC of 0.37, to a vinyl frame window with U-value of 0.36 and SHGC of 0.29.
  • Space Heating Type: Gas furnace
  • Space Heating Combustion: Power vented
  • Space Heating Capacity: 33.0
  • Space Heating Efficiency: 92.0
  • Space Heating Location: Attic
  • Space Heating Energy Proto: 21.0
  • Space Heating Energy: 37.0
  • Space Heating Fuel: Gas
  • Space Heating Upgrades: From 92% AFUE gas furnace located in vented, unconditioned attic, to 92% AFUE gas furnace located in cathedralized, semi-conditioned attic.
  • Lighting Energy: 22.0
  • Lighting Energy Proto: 12.0
  • Light Appliance: 64.0
  • Light Appliance Proto: 63.0
  • Light Eff Type: 2
  • Light EEF Per: 80.0
  • MEL Load: 1
  • Cooling Type: Electric Air Conditioner (split system)
  • Cooling Capacity: 2.0
  • Cooling SEER: 15.0
  • Cooling Fuel: Electric
  • Cooling Energy Proto: 37.0
  • Cooling Energy: 112.0
  • Cooling Upgrades: 13 SEER air conditioner in unconditioned, vented attic, to 15 SEER air conditioner located in cathedralized, semi-conditioned attic.
  • Duct Type: Sheet metal / Flex
  • Duct Location: In conditioned space
  • Duct R Value: 6.0
  • Air Distribution Location: Attic
  • Air Distribution Upgrades: From ductwork located in unconditioned, vented attic to ductwork located in semi-conditioned, cathedralized attic.
  • Air Tight Upgrades: Addition of low-density spray foam insulation on building envelope.
  • Air Handler Motor: ECM/Variable Speed
  • Vent Type: Central fan integrated supply
  • Vent Control: Duty Cycle (some operation in every hour)
  • Vent Capacity: 98.0
  • Vent Fan: 2.0
  • Vapor Barriers: Low-density spray foam insulation in wall and roof systems, thermo-sheath exterior sheathing as drainage plane, supply-only ventilation system that provides positive pressure to interior of house, properly sized HVAC.
  • Drainage Upgrades: None
  • Vapor IN: 4
  • Vapor EX: 4
  • Hot Water Type: Gas - tankless
  • Hot Water Backup: Gas - tank
  • Hot Water Combustion: Sealed combustion
  • Hot Water Location: Garage
  • Hot Water Capacity: 1.0
  • Hot Water Efficiency: 0.819999992847
  • Hot Water Energy Proto: 10.0
  • Hot Water Energy: 17.0
  • Hot Water Fuel: Natural Gas
  • Hot Water Upgrades: None
  • Energy Star Rating: Yes
  • HERS Rating 2006: 67.0
  • Modeler's Name: Ari Rapport
  • Other Awards: Award; 2007 Greater San Antonio Builder's Ass'n Builder of the Year; Build San Antonio Green certified
  • Benchmark Version: 2007
  • Total Energy Use: 254.0
  • Total Energy Use Proto: 143.0
  • Percent Energy Savings: 43.7
  • Total Energy Savings: 43.7
  • Site Gen: None

Specification 4754

  • Percent Energy Savings: 0
  • Submitted: No
  • Approved: No
  • Editor: Ari Rapport
  • Modified: 2010-04-20 00:00:00
  • Model Name: Lilac
  • Floor Plan: 3177
  • Style: Single-family detached, site built
  • Number of Stories: 2.0
  • Number of Bedrooms: 5
  • Floor Area: 3177.0
  • Conditioned Volume: 40695.0
  • Surface Area: 7930.0
  • Roof Framing: Cathedral
  • Roof Insulation: Spray Foam
  • Roof R Value: 19.0
  • Roof Radiant: No
  • Roof Upgrades: From R-30 blown cellulose in a full, vented attic with a radiant barrier, to R-19 low-density spray foam insulation in a cathedralized, sealed attic.
  • Wall Framing: Wood - 2x4 - 16 in o.c.
  • Wall Insulation: Spray Foam
  • Wall R Value: 13.0
  • Wall Radiant: No
  • Wall Upgrades: From R-13 blown cellulose to R-13 low-density spray foam insulation.
  • Foundation Type: Slab on grade
  • Foundation Construction: Poured concrete
  • Foundation Insulation: None
  • Window Glazing: Double pane - low-e - argon filled
  • Window Framing: Vinyl
  • Window U Value: 0.360000014305
  • Window SHGC: 0.289999991655
  • Window Glazing Area: 398.0
  • Window Upgrades: From an aluminum frame window with U-value of 0.48 and SHGC of 0.37, to a vinyl frame window with U-value of 0.36 and SHGC of 0.29.
  • Space Heating Type: Gas furnace
  • Space Heating Combustion: Sealed combustion
  • Space Heating Capacity: 60.0
  • Space Heating Efficiency: 92.0
  • Space Heating Location: Attic
  • Space Heating Energy Proto: 24.0
  • Space Heating Energy: 67.0
  • Space Heating Fuel: Gas
  • Space Heating Upgrades: From 92% AFUE gas furnace located in vented, unconditioned attic, to 92% AFUE gas furnace located in cathedralized, semi-conditioned attic.
  • Lighting Energy: 35.0
  • Lighting Energy Proto: 17.0
  • Light Appliance: 91.0
  • Light Appliance Proto: 89.0
  • Light Eff Type: 2
  • Light EEF Per: 80.0
  • MEL Load: 1
  • Cooling Type: Electric Air Conditioner (split system)
  • Cooling Capacity: 3.0
  • Cooling SEER: 15.0
  • Cooling Fuel: Electric
  • Cooling Energy Proto: 53.0
  • Cooling Energy: 188.0
  • Cooling Upgrades: 13 SEER air conditioner in unconditioned, vented attic, to 15 SEER air conditioner located in cathedralized, semi-conditioned attic.
  • Duct Type: Sheet metal / Flex
  • Duct Location: In conditioned space
  • Duct R Value: 6.0
  • Air Distribution Location: Attic
  • Air Distribution Upgrades: From ductwork located in unconditioned, vented attic to ductwork located in semi-conditioned, cathedralized attic.
  • Air Tight Upgrades: Spray foam insulation provides air sealing
  • Air Handler Motor: PSC
  • Vent Type: Central fan integrated supply
  • Vent Control: Duty Cycle (some operation in every hour)
  • Vent Capacity: 162.0
  • Vent Fan: 4.0
  • Vapor Barriers: Low-density spray foam insulation in wall and roof systems, thermo-sheath exterior sheathing as drainage plane, supply-only ventilation system that provides positive pressure to interior of house, properly sized HVAC.
  • Drainage Upgrades: Bond break behind exterior stucco with additional drainage plane
  • Vapor IN: 4
  • Vapor EX: 4
  • Hot Water Type: Gas - tankless
  • Hot Water Backup: Other
  • Hot Water Combustion: Sealed combustion
  • Hot Water Location: Garage
  • Hot Water Capacity: 1.0
  • Hot Water Efficiency: 0.819999992847
  • Hot Water Energy Proto: 10.0
  • Hot Water Energy: 23.0
  • Hot Water Fuel: Natural Gas
  • Hot Water Upgrades: From gas tank water heater, standard efficiency
  • Energy Star Rating: Yes
  • HERS Rating 2006: 57.0
  • Modeler's Name: Ari Rapport
  • Other Awards: Award; 2007 Greater San Antonio Builder's Ass'n Builder of the Year; Build San Antonio Green certified
  • Benchmark Version: 2009
  • Total Energy Use: 408.0
  • Total Energy Use Proto: 193.0
  • Percent Energy Savings: 52.69
  • Total Energy Savings: 52.69
  • Site Gen: None

Specification 4758

  • Percent Energy Savings: 0
  • Submitted: No
  • Approved: No
  • Editor: Ari Rapport
  • Modified: 2010-07-09 00:00:00
  • Model Name: Monterrey
  • Floor Plan: 3583 - Test House
  • Style: Single-family detached, site built
  • Number of Stories: 2.0
  • Number of Bedrooms: 5
  • Floor Area: 3670.0
  • Conditioned Volume: 33615.0
  • Surface Area: 8627.0
  • Roof Framing: Other
  • Roof Insulation: Spray Foam
  • Roof R Value: 19.0
  • Roof Radiant: No
  • Roof Upgrades: No changes
  • Wall Framing: Wood - 2x6 - 24 in o.c. (Advanced Framing)
  • Wall Insulation: Sprayed cellulose
  • Wall R Value: 20.0
  • Wall Sheathing: XPS
  • Wall Sheathing R Value: 3.0
  • Wall Radiant: No
  • Wall Upgrades: From 2x4", 16" o.c. framing with low-density spray foam insulation and no insulating sheathing, to 2x6", 24" o.c. OVE framing with sprayed in cellulose and R-3 insulating sheathing
  • Foundation Type: Slab on grade
  • Foundation Construction: Poured concrete
  • Foundation Insulation: None
  • Foundation Upgrades: No changes
  • Window Glazing: Double pane - low-e - argon filled
  • Window Framing: Vinyl
  • Window U Value: 0.34999999404
  • Window SHGC: 0.219999998808
  • Window Glazing Area: 398.0
  • Window Upgrades: From 0.36 U-value/ 0.29 SHGC, to 0.35 U-value/ 0.22 SHGC
  • Space Heating Type: Gas furnace
  • Space Heating Combustion: Power vented
  • Space Heating Capacity: 60.0
  • Space Heating Efficiency: 94.0
  • Space Heating Location: Attic
  • Space Heating Energy Proto: 22.0
  • Space Heating Energy: 67.0
  • Space Heating Fuel: Gas
  • Space Heating Upgrades: From 92% AFUE to 94% AFUE gas furnace
  • Lighting Energy: 35.0
  • Lighting Energy Proto: 12.0
  • Light Appliance: 91.0
  • Light Appliance Proto: 93.0
  • Light Eff Type: 2
  • Light EEF Per: 100.0
  • MEL Load: 1
  • Renewable Energy Offset: 36.0
  • Cooling Type: Electric Air Conditioner (split system)
  • Cooling Capacity: 3.0
  • Cooling SEER: 17.0
  • Cooling Fuel: Electric
  • Cooling Energy Proto: 44.0
  • Cooling Energy: 188.0
  • Cooling Upgrades: From 15 SEER A/C to 17 SEER A/C
  • Duct Type: Sheet metal / Flex
  • Duct Location: In conditioned space
  • Duct R Value: 6.0
  • Air Distribution Location: Attic
  • Air Distribution Upgrades: No changes
  • Air Tight Upgrades: Spray foam insulation provides air sealing on roof deck, and strategic air sealing of wall cavities is performed prior to insulation installation
  • Air Handler Motor: PSC
  • Vent Type: Central fan integrated supply
  • Vent Control: Duty Cycle (some operation in every hour)
  • Vent Capacity: 98.0
  • Vent Fan Proto: 9.0
  • Vent Fan: 4.0
  • Vapor Barriers: Low-density spray foam insulation inroof systems, XPS exterior foam sheathing as drainage plane, supply-only ventilation system that provides positive pressure to interior of house, properly sized HVAC.
  • Drainage Upgrades: Bond break behind exterior stucco with additional drainage plane
  • IAQ Upgrades: No changes
  • Vapor IN: 4
  • Vapor EX: 4
  • Hot Water Type: Solar assisted
  • Hot Water Backup: Electric resistance
  • Hot Water Combustion: Not Applicable
  • Hot Water Location: Garage
  • Hot Water Capacity: 115.0
  • Hot Water Energy Proto: 3.0
  • Hot Water Energy: 23.0
  • Hot Water Fuel: Electric
  • Hot Water Upgrades: From 0.82 tankless gas water heating, to solar thermal water heating with electric resistance back-up heating
  • Energy Star Rating: Yes
  • HERS Rating 2006: 40.0
  • Modeler's Name: Ari Rapport
  • Other Awards: Build San Antonio Green certified; DOE Builder Challenge certified
  • Benchmark Version: 2010
  • Total Energy Use: 408.0
  • Total Energy Use Proto: 183.0
  • Percent Energy Savings: 55.14
  • Percent Site Energy: 8.82
  • Total Energy Savings: 63.96
  • Site Gen: PV
  • SG Capacity: 2.0

Data and Resources

Additional Info

Field Value
Author Ari Rapport
Maintainer Ari Rapport
Last Updated September 16, 2016, 22:20 (Etc/UTC)
Created September 16, 2016, 22:20 (Etc/UTC)
Construction Type New Construction
Evaluation Level Community Scale
Climate Hot - Humid
City San Antonio
State TX
Zip Code 99999
Phase Before 2010
Project Start Date 1970-01-01
Project Estimated End Date 1970-01-01
Project Actual End Date 1970-01-01
Completed House Count 1
Expected House Count 1
Energy Savings Percentage 1
Average Estimated Annual Source Energy (MMBtu) 1
Average Conditioned Floor Area (sqft) 1

Dataset extent

Map data © OpenStreetMap contributors
Tiles by OpenStreetMap