EcoStud Energy Savings Analysis This report is the property of Superior Polymer Products, any unauthorized use or reproduction is prohibited. Bobbi S. Wood

2 This report is the property of Superior Polymer Products, unauthorized use or reproduction is prohibited. Goal Calculate the cost savings of using EcoStuds in place of Steel studs in a building. Calculate the cost savings of using EcoStuds in place of Steel studs in a building.

3 This report is the property of Superior Polymer Products, unauthorized use or reproduction is prohibited. RadTherm Model Setup Polystyrene Foam Board (1.5 inch) Gypsum Board (0.5 inch) Concrete Wall Top View Stud 25 gauge Steel Versus 0.09inch EcoStud (16 inches on center) Average Outside Air = 32 o F (0 o C) Inside Air = 68 o F (20 o C)

4 This report is the property of Superior Polymer Products, unauthorized use or reproduction is prohibited. Calculate R-Values A steady state thermal model of a wall section was used to calculate the R-value A steady state thermal model of a wall section was used to calculate the R-value R-Value Steel Z Fur 7.8 EcoStud9.4

5 This report is the property of Superior Polymer Products, unauthorized use or reproduction is prohibited. RadTherm Model Output Cost to maintain constant Room Air Temperature of 20 o C for Average Winter Day per 100sqft Cost to maintain constant Room Air Temperature of 20 o C for Average Winter Day per 100sqft Steel Studs $2.57 EcoStud$2.47 Savings/Day$0.10 Calculations based on Electric Heat [$0.076/KW-hr or $259.3/BTU]

6 This report is the property of Superior Polymer Products, unauthorized use or reproduction is prohibited. Thermal Models 10ft 20ft 10ft 40ft 10ft 100sqft 400sqft 1600sqft Inside Air Set to 68 o F [20 o C] Model 1 Model 2 Model 3

7 This report is the property of Superior Polymer Products, unauthorized use or reproduction is prohibited. Model Set Up and Boundary Conditions Each model was run twice Each model was run twice 1. R-value for Steel studs applied to wall 2. R-value for EcoStuds applied to wall Boundary Conditions Boundary Conditions Winter day – Average Air Temp 32 o F [0 o C] Winter day – Average Air Temp 32 o F [0 o C] Internal Air temperature fixed at 68 o F [20 o C] Internal Air temperature fixed at 68 o F [20 o C] 24 hour diurnal (Weather File) 24 hour diurnal (Weather File) Roof and Floor were assigned temperature parts and were not connected by conduction to the walls or the air inside the room Roof and Floor were assigned temperature parts and were not connected by conduction to the walls or the air inside the room

8 This report is the property of Superior Polymer Products, unauthorized use or reproduction is prohibited. Outside Air Temperature

9 This report is the property of Superior Polymer Products, unauthorized use or reproduction is prohibited. Cost Savings for each Model This plot shows that the cost savings is linearly proportional to wall surface area

10 This report is the property of Superior Polymer Products, unauthorized use or reproduction is prohibited. ROI  Fuel  Nat Gas $  Propane $  Fuel Oil $  Electric $ ,000 ft 2 building 10’ high, 400’ outside wall 10,000 ft 2 building 10’ high, 400’ outside wall  Additional consumer cost for EcoStud is $  Nat Gas.0067/ft3 – Propane $1.49/gal – Fuel Oil $1.40/gal – Electric $0.16/kwh Savings per Day Days to ROI Years to ROI Savings per Day Days to ROI Years to ROI