Spreadsheet:
Step 6:
Air Conditioning Unit Size
● With two people working in the shed adding 450 Btu/H and equipment contributing 2000
Btu/H heat gain, the total heat gain for air conditioning would be:
○ 5,013 (heat loss) + 450 Btu/H (people) + 2,000 Btu/H (equipment) = 7463 Btu/H
● Since air conditioners are sized by the ton, you would need a unit with a capacity of:
○ (7463 Btu/H * 1 ton/ 12,000 Btu/H) = .62 tons
If rounded up to the nearest ton, you would need a 1 ton air conditioning unit for the utility shed.
Step 7:
Heater:
● Rounding up to the nearest thousand, you need a heater rated at 8000 Btu/H - Potential
Heater Option from Amazon
Step 8:
1. Double-glazed windows - 528
2. Insulated doors - 999
3. More Effective Insulation Roof - 326
Conclusion Questions:
1. Where does the greatest heat loss occur in this structure?
The greatest heat loss in the structure occurs through the door and window. They have the lowest
U-factors (0.59 and 1.14, respectively), which means that they are the best conductors of heat. This
is followed by the west wall (0.07), east wall (0.07), north wall (0.07), and south wall (0.07). The
roof has the lowest U-factor (0.049), which means that it is the best insulator against heat loss.
2. What was the most significant change made to make this structure more energy efficient?
The most significant change made to make the structure more energy efficient was the increase in
the R-value of the insulation in the walls and roof. The higher the R-value, the better the insulation.
The R-value of the insulation in the walls was increased from 11 to 14.13, and the R-value of the
insulation in the roof was increased from 16 to 21.33. This increased R-value will significantly
reduce the heat loss through the walls and roof.
3. What effect could using 2x6 studs in the shed construction have on energy heat loss/gain?
Using 2x6 studs in the shed construction would have a positive effect on energy heat loss/gain. This
is because 2x6 studs can accommodate more insulation than 2x4 studs, which would help to reduce
heat loss in the winter and heat gain in the summer.
0
