Appendix II. Verification of Glare Control testing using Vectorworks 2008.

9” overhang model

showing direct sun on

workplane at 9 am and

3 pm on the equinox.

Simulations

Page 1

Westfield HAP Simulations 6/22/11 DCL

Code Base Williamstown Better Walls R-20ci Walls Marvin/PPG Orientation Pella/PPG Pella/Viracon Serious/Viracon with Code Lighting

OpCost-Elec $81,406 $69,223 $69,258 $69,288 $68,593 $68,650 $66,911 $67,118 $67,209OpCost-NG $42,687 $32,004 $30,943 $30,306 $30,412 $30,618 $31,926 $31,376 $30,231% Energy Savings 22.4% 24.1% 25.1% 25.1% 24.9% 23.4% 24.1% 25.9%% Cost Savings NA 18.4% 19.3 19.7 20.2 19.9 20.4 20.6 21.5LEED Points NA 4 4 4 5 4 5 5 5

Lighting -kWh 228,249 0% 0% 0% 0% 0% 0% 0% 0%Heating -ccf 38,944 25% 28% 29% 29% 29% 25% 27% 29%Cooling -kWh 57,649 -12% -13% -13% -6% -9% 11% 9% 8%Pumps -kWh 45,964 76% 76% 76% 76% 76% 76% 76% 76%Fans -kWh 163,857 39% 39% 39% 39% 39% 40% 40% 40%Plug -kWh 55,146 0% 0% 0% 0% 0% 0% 0% 0%

Run# 5 6 6A 7 7A 8 9 101.2W/sf R-15 Insulation U.33/SHGC.46 180 degrees U.26/SHGC.25 U.19/SHGC.24

U.28/SHGC.27 U.18/SHGC.34

Notes:Code Base is the Williamstown Building with Worcester Weather, Oriented as Williamstown, Improved to Minimum Code. (R-20ci Roofs, R-11.4ci Walls, U.35/SHGC.40 Wood Windows, U.45/SHGC.4 Metal Windows, 1.2 W/sf Lighting.)

OpCosts based on current Commercial Natural Gas Rates G71-G74, and Electric General Service #E33.OpCost numbers should be increased to account for larger Westfield School, Williamstown model is 81,000sf.Better walls was carried thru later simulations.

Runs 5-6 Better wall insulation decreases heat load and slightly increases cooling load. Runs 6-6A Effect of going to 4” insulation in wall.Runs 5-7 Improving windows from code windows; U.35SHGC.40 wood windows go to U.33/SHGC.46 and U.45/SHGC.40 metal go to U.28/SHGC.27.

Sizable reduction in cooling load due to SHGC reduction.Runs 5-8 Reduction in SHGC increases heating load, less solar gain. Big savings in cooling.Runs 5-9 4th best energy performer but 2nd best opcost performer because it saves 2nd most elec for cooling and electricity is the more expensive fuel.Runs 5-10 Lowest opcost and energy use.

CUTOFF

ANGLES

2'-4

"

3'-5 1/4"

8'-4

"5

"

2'-6

"

4'-0"

26 deg. (9 am at equinox)

desk

48.3 deg. (noon at equinox)

11" 10" 9 1/2"

EXAMPLE LOUVER GEOMETRY FOR 36" WIDE X 5 " DEEP LOUVER.CRITERIA IS TO CUT OFF DIRECT LIGHT ON DESKTOP FOUR FEET FROM THE WINDOW WALL BETWEEN NINE A.M. AND 3 P.M. AT NOON ON THE EQUINOX. LOCATION: BOSTON, MA.

45 DEG. FIN.