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Cardinal Energy Calculator

Using energy efficient LoE glass in your house can mean significant heating and cooling savings.

Use this tool to configure location, housing and window details and see how your choice in windows makes a difference.

  • 28% Windows
  • 9% Internal Gains
  • 10% Foundation
  • 13% Roof
  • 16% Walls
  • 24% Air Leakage
The greatest cause of home energy loss
Energy Calc
WINDOW MODE <<>> PERFORMANCE MODE
SHGC
Yes We Can
U-FACTOR
Yes We Can
Waring could go here
Custom Performance
CLASS 1
Pane
1
Side
1 -- 2
ARGON
6.5"
LoĒ²-272
Pane
2
Side
3 -- 4
LoĒ-180
ARGON
6.5"
Pane
3
Side
5 -- 6
LoĒ-i89
HOUSING
ANNUAL COSTS
PERFORMANCE & CODE COMPLIANCE
HOURS OF DISCOMFORT
  • Minneapolis, MN
  • East /West Oreintation
  • +2 Floors, 3600 ft2
  • Built After 1990
  • External - NONE
  • INT. Summer - Most of the time
  • INT. Winter - 1/2 time
  • Winter Gas- $0.08 / therm
  • Summer Electric = $0.12 kWh
SUMMER$1,200
WINTER$1,200
TOTAL$1,200
CARBON LBS CO2$1,200
SHGC0.25
IECC
U-FACTOR0.67
ENERGY STAR v6.0
  • Summer50
  • Spring / Fall20
  • Winter Day200
  • Winter Night520
  • ----
  • Total Hours790
Edit House
SQUARE FOOTAGE
Yes We Can
FLOORS
VINTAGE
ORIENTATION
Edit Shading
external shade
summer internal shade
winter internal shade
Edit Energy
Heat Pump
yes
no
Summer Electricity Price
Winter Electricity Price
Winter Gas Price
Annual Energy Costsnear: Winnipeg,MB
Cooling Cost Heating Cost
$500
$800
$2,000
$500
$800
$2,000
$500
$800
$2,000
$500
$800
$2,000
TOTAL:
Annual Savings
TOTAL COST
COST SAVINGS
SAVINGS PER SQ/FT
CARBON (CO2) SAVINGS
TOTAL COST
COST SAVINGS
SAVINGS PER SQ/FT
CARBON (CO2) SAVINGS
Energy Codes Compliance
fill
ENERGY STAR V6.0
ENERGY MAP
IECC MAP
ENERGY STAR v6.0 MAP
Hours of Discomfort by Season
Winter Night Winter Day spring / Fall Summer
60
40
100
120
120
60
40
100
120
120
60
40
100
120
120
60
40
100
120
120
HOURS:
Energy Calc
CONFIGURATION
< toggle
Baseline: Code Default 2P
Clear Glass
Argon / Typical Frame
edit >
MODE:
WINDOW
PERFORMANCE
SHGC
Yes We Can
U-FACTOR
Yes We Can
< DONE
My Window: 2P 3/4"
LoĒ³-366 + LoĒ-i89
Argon / Typical Frame
edit >
MODE:
WINDOW
PERFORMANCE
SHGC
Yes We Can
U-FACTOR
Yes We Can
< DONE
Example: 2P 3/4"
LoĒ³-366 + LoĒ-i89
Argon / Typical Frame
edit >
MODE:
WINDOW
PERFORMANCE
SHGC
Yes We Can
U-FACTOR
Yes We Can
< DONE
Example: 2P 3/4"
LoĒ³-366 + LoĒ-i89
Argon / Typical Frame
HERE IS THE MAP
Location NearSelect From Map
Comparative
results
Costs
Savings
Codes
Comfort
PDF

More About Cardinal

Since 1962, Cardinal's mission has been to provide the highest quality glass products for residential windows throughout the world.

Today we’re the largest fabricator of sealed insulating glass units and supply over half the low-emissivity coatings used in North America. We now distribute our energy efficient and durable glass products worldwide.

Legal

Disclaimer. Please Note:

Window U-Factor and SHGC are estimates based on center of glass properties and a typical operable size frame area with user selection of frame thermal performance level. These estimates should be used for comparative purposes only within the Cardinal website and analysis tools. Building energy codes require window manufacturer’s to rate U and SHGC per NFRC procedures (www.nfrc.org).

Heating and cooling energy costs are estimated from regression analysis of building simulations using the REM/Design program (www.archenergy.com) and residential building insulation levels described in the Resfen User Guide (http://windows.lbl.gov/software/resfen/6/RESFEN60UserManual.pdf).

Total window area is set at 18% of floor area for new construction, and 15% for existing houses. Window area distribution is assumed at 50% to the back, 10% on either end, and 30% to the front.

House size, vintage, orientation, shade conditions, and energy costs are user inputs.

Window comfort analysis is derived using ASHRAE Standard 55 Thermal Environmental Conditions for Human Occupancy protocols (www.ashrae.org) and NFRC sponsored research “Window Performance for Human Thermal Comfort, February 2006”.

ENERGY STAR compliance estimates are for windows only. Northern criteria will be effective in January of 2016, all other zones go into effect January 2015. Go to https://www.energystar.gov/sites/default/files/ES_Final_V6_Residential_WDS_Spec.pdf to see the full set of requirements for windows, doors, and skylights.