OWENS CORNING
COMMERCIAL ENERGY CALCULATOR
USAGE INSTRUCTIONS
OWENS CORNING
COMMERCIAL ENERGY CALCULATOR
USAGE INSTRUCTIONS
design is now complete. Click on the
Calculate button at the bottom of
the screen to begin the energy cost
saving simulations.
6. The following window will be
displayed when you press the
Calculate button. This page will
display the progress while the
Commercial Energy Calculator
processes the entered project data.
Note: Please allow the calculator time
to process the submitted data.
Note: When the cursor is held over
the Schedule drop down box a brief
explanation of the available schedules
will appear. Additional field information is
available on the Help menu.
5. After pressing the Submit button,
you will be taken to a screen where
you can input the specific building
dimensions, type of roof, space
7. When the calculations are complete,
the following Results screen will be
displayed. The initial simulation targets
Proposed energy efficiency measures
for the building Envelope, HVAC,
and Lighting systems that will achieve
a 50% reduction in energy cost and
qualify for the $1.80 per square foot
tax deduction per the Energy Policy
Act of 2005 (EPAct 2005). The
conditioning category and window
percentages. Begin by entering the
building Length (ft), Width (ft), and
Average Wall Height (ft). Next, select
the Roof Type and Space Conditioning
category from the pull down menus.
Finally, type in the Windows (% of Wall
Area) for each wall and Skylights (% of
Roof Area) for the roof. Your building
Baseline levels for this simulation are
derived from ASHRAE 90.1-2001 as
mandated in EPAct 2005.
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OWENS CORNING
COMMERCIAL ENERGY CALCULATOR
USAGE INSTRUCTIONS
8. Further, you can examine the
possibility of qualifying for a $0.60 per
square foot partial tax deduction by
selecting the Envelope Only 16.67%
option from the Results Target pull
down menu. If your energy cost
savings are greater than 16.67%, your
building qualifies for the $0.60 per
square foot partial deduction if you
apply all of the Proposed envelope
measures.
The Commercial Energy Calculator
can be used to estimate the energy
cost savings and payback associated
with more thermally efficient
insulation systems in metal building
roofs and walls. To illustrate, let’s
compare the energy cost savings
associated with going from an R13 to
an R19 in a metal building wall
assembly. First, select Wall - R13 from
the Baseline Wall Construction pull
down menu and Wall – R19 from the
Proposed Wall Construction pull
down menu. Next, enter your
Note: A building cannot qualify for both
the Full EPAct 50% and the Envelope Only
16.67% tax deduction. The maximum
EPAct 2005 tax deduction is $1.80 per
square foot for a commercial building.
Installed Cost ($/ft2) for each of these
systems by typing over the default
numbers. Finally, select the No change
option from the Proposed pull down
menu for the remaining Envelope,
HVAC, and Lighting measures. Hit
the Recalculate button to determine
the energy cost savings associated
with changing to this level of wall
insulation.
9. Some buildings will not qualify for
either tax deduction, but the
Commercial Energy Calculator is not
just about EPAct…it is also about
PAYBACK. The Measures Costs &
Payback estimates a payback for your
building with and without the EPAct
tax deduction.
If you have additional questions about
the Commercial Energy Calculator
contact your Owens Corning
Representative.
OWENS CORNING INSULATING SYSTEMS, LLC
ONE OWENS CORNING PARKWAY
TOLEDO, OHIO, USA 43659
™
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Pub. No. 10005370. Printed in U.S.A. August 2007. THE PINK PANTHER™
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