1. CSM 345 Building Thermal Assessment Project
Neal Dudash
&
Nick Eilerman
June 1st 2012

2. Table of Contents

Interior and Exterior Design Temperature
1

Heat Load Calculations
1-2

Energy Reduction Plan
3

Conclusion
4

Floor Plans
5

Heat Load Calculation Before
6-7

Heat Load Calculation After
8-9

3. The report below was compiled by Neal Dudash and Nick Eilerman. The residence used was
belonged to Neal Dudash and is located in Blacklick, Ohio. Neal measured and drew the layout of the
residence, while preformed the calculations based on the materials provided. The results of the
calculations and methods used are detailed below.
Interior and Exterior Design Temperature:
The indoor design temperature was used was 66°F, while the exterior design temperature used
was 6°F which was obtained from Table 4.6 on page 114 of the text book using Columbus, International
Airport.
Heat Load Calculations
The heat load was calculated to be at total of 25636 for a 2400 square foot residence located in
Blacklick, Ohio. The heat load was calculated for the first floor of the structure to be 12168, while the
second floor was calculated to be 13468. The size of the furnace calculated to be 26000 BTU/hr. The
size of the furnace in the structure is rated at 30000 BTU/hr at 85% efficiency and installed in 1998 when
the house was built. The fuel consumed during the heating season was 649.51 CCF of natural gas. The
energy bill showed a usage of 51 CCF of natural gas during the month of February. Heat Load and costs
of different heating sources are listed in the table on the following page.

4. Fuel Type
Cost/Unit
(FC)
BTU/Unit
(FEC)
Efficiency
(eff)
Fuel Type
Fuel
Consumed
BTU/Unit
484.83
606.30
833.27
669.07
Seasonal
Heating Cost
Oil
Kerosene
Propane
Natural
Gas
$2.01
$3.85
$2.35
$1.18
138,000
134,000
91,000
100,000
0.85
0.7
0.75
0.85
Oil
Kerosene
Propane
Natural
Gas
Wood
Pellets
$195
8,200
0.8
Wood
Pellets
8669.34
$845.26
Shelled
Corn
$3.85
448,000
0.85
Shelled
Corn
149.35
$574.98
Electric
$0.11
3,412
1
Electric
16667.91
$1,831.80
BTU/HR for Windows, Walls, Roof & Infiltration
Infiltration
27%
Windows
20%
Roof
9%
Walls
44%
$974.51
$2,334.25
$1,958.19
$789.50

5. Energy Reduction Plan:
In order to reduce seasonal heating costs by ten percent the original caulking would be removed
and replaced around all windows and doors costing a total of $72.15. The pay-back on the caulking
would be one season. Also weather stripping would be placed under the exterior doors at a cost of
$15.30. It would take one season to recoup the money spent on the weather stripping.
Fuel Type
Oil
Cost/Unit
BTU/Unit
Efficiency
(FC)
(FEC)
(eff)
$2.01
138,000
0.85
Fuel
Type
Oil
Kerosene
$3.85
134,000
0.7
Kerosene
Propane
Natural
Gas
Wood
Pellets
Shelled
Corn
Electric
$2.35
91,000
0.75
$1.18
100,000
0.85
$195
8,200
0.8
$3.85
448,000
0.85
$0.11
3,412
1
Propane
Natural
Gas
Wood
Pellets
Shelled
Corn
Electric
480.96
$966.72
601.45 $2,315.59
826.61 $1,942.53
663.72
$783.19
8600.02
$838.50
148.15
$570.38
16534.62 $1,817.15
Also replacing the furnace would help reduce fuel consumption and energy cost by replacing the current
85% efficient furnace to a 98.2% furnace at a cost of $2700 including labor to install would reduce the
fuel consumption of natural gas by $107 per year if the cost of natural gas was $1.18 per CCF. It would
take 25 years to recover the cost of the new furnace in savings provided the cost of fuel remains
constant.

6. Conclusion:
By setting the interior design temperature at 66°F and exterior design temperature at 6°F from
Table 4.6 for Columbus, Ohio, we were able to calculate the heating load required for the residence with
current equipment. AS the residence is currently constructed it has a total heating load of 25636
BTU/hr. By making several modification including replacing caulking around window and doors, and
placing weather stripping under the exterior doors we were able to reduce the energy consumption,
without major renovations to the residence. The largest contributor to the reduction of the energy
consumption was the installation of higher efficiency furnace and sealing the duct work.