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Contents Page
Summary of Results . 2
Methods .. 3
Discussion 4
Reference .. 5
Appendix 1. . 6
Appendix 2. .. 10
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Table 2. Comparison of Heat loss calculation to Baseline
4%
11%
7%
2%
1%
54%
11%
2%3%
5%
.
B
A
0.91
2.1
A
Summary of Results
Table 1. Heat loss Calculation by month (*JulyandAugustexcluded because no heat loss to outside)
Jan Feb Mar Apr May June Sept Oct Nov Dec Total
MJ / Month 8,646 7,627 6,499 5,233 4,262 3,286 ,3655 4,886 5,703 6,881 56,678
% 15 13 11 9 8 6 6 9 10 12 100
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Methods
Heat loss calculation
The heat loss calculation done by using the heat loss equation to calculate the energy loss per
month for every section (wall, window, slab), then summing it to get the annual value. This
annual value was then divided by floor area of the house (253 m^2) to get the Energy/m^2. July
and August months were excluded from these calculations because they are considered cooling
seasons.
Heat loss equation Q = A*(1/R)*T
- For wall sections exposed to air T was taken as the difference of average monthly outdoortemperature given by Environment Canada and indoor temperature (21 C).
- For slab on gradethe T = 7C (ground temp) 21C (inside temp) = 14 C- ForBasement wall section below groundthe T was taken as (7 C + average outside air
temp)/2
-The air infiltration heat loss used the equation: Q = 0.018*V*T*ACH
- V is the volume of the house, assumed to be a rectangle with volume 22,548 ft^3- ACH (air change per hour): assumed to be 2.5
A sensitivity analysis was done on model by testing different assumptions such as varying indoor
air temp between 19 C and 23 C and varying ACH value to 2.5 (Normal leaks house),5(Medium leak), and 10 (very Leaky House). Below is the Scenario Summary.
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Cost/m^2. The sum volume of natural gas consumed for 2011 and 2012 averaged to find the
annual volume for natural gas.
Annual Energy (MJ) = ( *38MJ/m^3 * PEF
Annual Energy(kwh)/m^2 = Annual Energy (MJ)/ 3.6 /253 m^2
Annual Cost = [Annual Energy (MJ) * Current Marginal Cost + 12 (month)*( $20 + $23.35 +
$17.24)] * 1.13 = $1710
Annual cost/m^2 = Annual cost / 253 m^2
A sensitivity analysis was done on varying water heating baseline(m^3) per month to see the
effects it would have on Annual Energy/m^2. Below is the Scenario Summary.
.
:
80
40
100
() 67 80 40 100
(/) 70 63 84 53
$810.98 $792.06 $850.26 $762.96
Discussion
With present analysis the Heat loss calculations predict annual energy per of about 36
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There are numerous sources of error in the analysis that wasnt included in this report but should
be considered in the future. They include heat loss due to window/door opening, temperature
fluctuation by year, energy gain by people, and energy gain by appliances.
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Appendix 1: Heat loss Calculation
A
4.2 31 21 25.2 45
3.2 28 21 24.2 44
1.3 31 21 19.7 35
A 7.6 30 21 13.4 24
14.2 31 21 6.8 12
19.2 30 21 1.8 3
22.2 31 21
A 21.3 31 21
17 30 21 4 7
10.6 31 21 10.4 19
4.8 30 21 16.2 29
0.9 31 21 21.9 39
A
()
A
(2)
B
348 32.33 2.7 0.37037037181,238 157,203 141,682
A
398.8
6 37.06 1.2 0.833333333
467,384 405,401 365,376
867.5
7 80.6 4.1 0.243902439297,547 258,087 232,606
872.776 705 66 533 59 964
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$87.12 $84.65 $83.06
A () A (2) A
B 348 32.33 2.7 0.37037037 93,264 48,906
A 398.86 37.06 1.2 0.83333333 240,513 126,120
867.57 80.6 4.1 0.24390244 153,116 80,290
872.79 81.08 16 0.0625 39,472 20,698
1128.6 104.85 35 0.0285714323,333 12,235
525 48.77 0.32 3.1251,187,156 622,519
383.8 35.66 1.1 0.90909091 252,471 132,390
0.9167.44 6.27 0.91 1.0989011 53,626 28,120
2.1
223.84 20.80 2.1 0.47619048 77,129 40,445
A 22548 734,208 385,003
B 2,854,287 1,496,725
837 439
3011 1579
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383.8 35.66 1.1 0.90909091 33,914 75,364
0.9167.44 6.27 0.91 1.0989011 7,203 16,008
2.1223.84 20.80 2.1 0.47619048 10,361 23,024
A 22548 98,625 219,167
B 383,412 852,026
112 250
405 899
$69.79 $71.36
A () A (2)
B 348 32.33 2.7 0.37037037 74,797 112,752 A 398.86 37.06 1.2 0.83333333 192,889 290,769
867.57 80.6 4.1 0.24390244 122,797 185,110
872.79 81.08 16 0.0625 31,656 47,720
1128.6 104.85 35 0.02857143 18,713 28,209
525 48.77 0.32 3.125 952,088 1,435,219
383.8 35.66 1.1 0.90909091 202,479 305,226
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872.79 81.08 16 0.0625 66,660 426,493
1128.6 104.85 35 0.02857143 39,405 252,112
525 48.77 0.32 3.125 2,004,877 12,827,194
383.8 35.66 1.1 0.90909091 426,374 2,727,939
0.9167.44 6.27 0.91 1.0989011 90,564 579,427
2.1223.84 20.80 2.1 0.47619048 130,256 833,376
A 22548 1,239,935 7,933,099
B 4,820,336 30,840,496
1413 9038
5086 32538
$84.68 $788.54
Appendix 2. Baseline calculation
() = 38/3
1 32 514 19532 = 1.0057
2 31 512 19456 B (3)
3 27 271 10298 A (2)
( 2013 )
( / )
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7 31 47 1796
8 31 74 2828
9 29 39 149010 32 151 5732
11 29 197 7490
(3) ()
12 28 296 11236 1453 55206.0504
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Tutorial #3
HOT 2000 Modeling and Discussion
Paul Furbacher 995940102, Brett Sagert 997233845, Shuliang (Peter) Sun 996007440
Discussion
After completing the HOT 2000 model and comparing it to the energy bills and hand
calculations, in the previous assignment, we noticed significant discrepancies. In order to discuss
possible discrepancies in further details we created a summary table as shown below for use
when referencing the data.
Table 1. Energy consumption of various models
Energy Type Bills HOT2000 Hand Calculation
Natural Gas (m3) 1900 6815 1725
Electricity (kWh) 13200 1278 -Hot Water (MJ) 25000 23400 -
As we can see given the results from the HOT 2000 model the natural gas consumption was
6815m^3. This result however is about 4 times greater than our calculated value and 3.5 times
greater than what the energy bill baseline showed. For the electricity consumption generated by
the model we saw consumption values far below the actual energy bills. Possible reasons for
discrepancy could be attributed to errors in modeling and what we used in reality. The domestic
hot water use on the other hand was modeled very accurately when compared to the bills as there
was only a small difference in the values
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When modeling the house in HOT 2000, the team put as much details into the model that was
possible based on the set options, in order to model the house as accurately as possible. Many of
these values were determined from the house plans such as the house area, window sizes,orientation, and others such values. Inputs between known values and modeled values differed
with respects such as the R values for windows and ventilation. The reasoning behind this was
due to the software automatically assigning R values for the windows based on code standards
for the give window dimensions. The program also had set values for the slab R values based on
set program choices which created a discrepancy between the model and our calculation. In the
table below we have noted the differences in R values between the model calculations and our
calculations.
Table 2. Model R values compared to calculation R values
Component Model R Calculation R
Sliding Door 1.13 2.1
Bay Window 1.34 2.1
Typical Window 1.1 2.1
Basement 1.96
Calculated
Separately
Table 3. Represents a break down component usage generated by HOT 2000
Component Annual Use (MJ) Percent of Total
Heating 235,003.67 79%Cooling 8,924.19 3%
Hot Water 23,797.84 8%
Li ht 5 949 46 2%
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Figure 1. Shows a pie chart representing the components of the Annual Heat Loss generated by
HOT 2000
Figure 2. Shows the annual heating loss by section generated from the hand calculations
3%
8% 5%
1%1%
3%
26%
COMPONENTS OF ANNUAL HEAT LOSS
Wall Section Below Grade
Wall Section Above Grade
Wall Section Main Floor
Wall Section Second Floor
Floor Section Roof
Floor Section Slab on Grade
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Civ 516 Sustainable
Buildings
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Abstract
Through employing various techniques and utilizing different materials the team was able tosignificantly bring down the energy consumption of the house in total quality and energy per unit
area. The retrofit was divided into two phases. Phase 1 concerned all building envelope related
retrofit measures. This included insulation, windows, and doors. Phase 2 concerned appliances
and machine related retrofit measures. The results according to HOT2000 simulation were
promising as the energy consumption after retrofit was decreased significantly. The energy
usage per unit area decreased from 301 ekwh/(m^2) before retrofit to 144.4 ekwh/(m^2). Which
ammounts to savings of 156 ewh/m^2.
Methods
Table 1.Phase 1Evelope retrofit
Insulation
Foundation Main Floor wall Second Floor
-Insulate floor with 3 XPS R9-Insulate wall with 4 XP R16
-Insulate wall with 2 XPS R9-Repace 1 air gap in wall
section with R5 spray
-Unchanged
Window upgrades
Replace with double glazed 13mm argon fill
Air tightness
Reseal doors and install operatable seals to Chimney
Table 2.Phase 2Appliance and machinery retrofitRetrofit Savings
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Phantom Load Reduce the phantom load by
unplugging appliance when
not in use.
Study shows apppliances
such as desktop computer,
micro-wave, and Televisionconsume between 0.8W2.6
W of phaton load [1].
Exterior Insulation of
basement wall
Increase R value of Basement Expensive, would need to
excavate around basement.
Nested Thermal Envelope Adds layers of insulation and
allows one part of buliding tobe heated at one time
Inpractical for house as the
bedrooms are located inbasement, and second floor.
Results
The results from HOT2000 show a significant reduction in energy consumption before and after
retrofit. Below is a table showing total Base Consumption(before) and Projected
Consumption(after).
Table 4. Saving in energy consumption (Before vs. After)
Energy (GJ)
Energy
(ekWh/m2)
Base Consumption
(before) 274.2 301.1
Total Savings 142.7 156.7
Projected
Consumption (after) 131.5 144.4
Total Energy Consumption
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Main floor Wall
Insulation 32.5 35.7
Window Upgrades 4.6 5.1Air Tightness 38.9 42.7
Phase 1 Total Savings 132.1 145.0
Projected Heating
Load 68.6 75
Table 6. Phase 2 energy savings
Phase 2
Component Annual Energy Savings (GJ) Savings (ekWh/m2)Domestic Hot Water 8.5 9.3
LED Lighting 1.6 1.8
Stove Upgrade 0.5 0.5
Total Savings 10.6 11.6
Projected Loads 60.1 66.0
Graph 1. Break down of savings by component
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Discussion
Overall the retrofit can be considered successful according to the simulation run by HOT 2000.
The energy intensity of the house decreased 52% from over 301kwh/m^2(before) to 144 kwh/m^2
(after). Phase 1 had the biggest impact on the retrofit project.
From graph 1 it shows that building envelope retrofits accounts for 90 percent of total savings
while phase 2 retrofit accounts for the other 10 percent. The reasons for the discrepancy are that
phase 1 retrofits are larger in volume and energy consumption compared to phase 2 retrofitsconsisting of appliances and machinery. In particular insulating the foundation had the biggest
impact (39%) on savings. The reason for this is the foundation was a 4 slab on grade which
offered very poor insulating values R=0.32 [2]. After retrofit the R value increased significantly
(R=9.32) to cut down on heat loss from the basement.
The air tightness accounts for the second biggest saving component (24.7%) as the ACH
decreased from 10 to 3. This means the natural gas burner will spend less energy providing heatto raise the air temperature which is in circulation.
Next the team may seek to implement some of the retrofits and examine the effects it has on the
energy consumption of the house.
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Civ 516 Sustainable
Buildings
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Contents
Executive Summary ....................................................................................................................................... 2
Retrofit Program Summary ........................................................................................................................... 3
Applicable Incentives .................................................................................................................................... 7
Technical Summary ....................................................................................................................................... 8
Building Envelope ...................................................................................................................................... 8
Foundation Insulation ........................................................................................................................... 8
Exterior Insulation ................................................................................................................................. 8
Windows ............................................................................................................................................... 8
Water Conservation .................................................................................................................................. 9
High Efficiency Flush Toilet ................................................................................................................... 9
Showerhead .......................................................................................................................................... 9
Washer .................................................................................................................................................. 9
Electrical Systems .................................................................................................................................... 10
Lighting ................................................................................................................................................ 10
Mechanical Systems ................................................................................................................................ 10
Domestic Hot Water ........................................................................................................................... 10
Stove ................................................................................................................................................... 10
References .................................................................................................................................................. 12
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Executive Summary
Over the course of this project we have analyzed the potential retrofit feasibility of a
house located in the East York region of Toronto. The house was originally built in 1948 as a
single dwelling bungalow but has had several upgrades and additions since then, mainly the
addition of the second floor. Currently the building has poor insulation levels in the basements
floors as well as the main floor walls and basement walls. We aim to fix this major problem as
well as upgrade other aspects of the house in the process.
Using the modeling program Hot2000 we were able to calculate the initial base load of
the house. From this point we proposed several retrofits that would bring the annual gross space
heating load down to 75 ekWh/m2and the total house consumption as close to 100 ekWh/m2as
possible. By introducing retrofits to the buildings envelope as well as the mechanical and
electrical systems we were able to bring the houses consumption down to an annual total of 144
ekWh/m2. Although this total is higher than we were hoping to achieve, the reduction in
building consumption was reduced by more than half of the base load consumption.
Another goal for this retrofit project was to then analyze the retrofits from a cost basis
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Once we determined the retrofits that we wanted to implement into the project we created
another model using the Hot2000 program that encompassed all of the retrofits. When comparing
the baseline model with the upgraded model we are able to see the potential savings of having
upgraded the house. Figure 3 and 4 represent the components of the energy consumed for the
upgraded house.
Figure 3Annual Upgraded Break Down of Energy Consumption 144.4 ekWh/m2
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Energy (GJ) Energy (ekWh/m2)
Base Consumption (Before) 274.2 301.1
Predicted Total Savings 142.7 156.7Projected Consumption (After) 131.5 144.4
Figure 5Savings in Energy Consumption
The amount of money that can be directly saved per year due to the difference in energy
consumption can be calculated when we split the energy consumed into the three different
energy sources. For this step we wanted to show the savings form the bills and how long it would
take to repay the loan if we were to implement all of the projects. Figure 6 below represents the
savings per year as well as the amount of money required to repay the loan of $42,000, for which
the capital calculations are given in Appendix 1 These calculations we done assuming that the
301
144
0 50 100 150 200 250 300 350
Base
Upgraded
Total Energy Consumption Projections
ekWh/m2
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Annual
Reduction Units Loan
Electricity 5040 eKwh $42,000 Loan RepaidNG 48500 eKwh YES
Water 120 m3
Electricity Price Natural Gas Water Price0.13 $/kWh 0.04 $/ekWh 2.62 $/m3
Year
Electricity
Savings NG Savings
Water
Savings Interest Repayment Loan Principal
1 $668.30 $1,978.80 $320.69 $(1,260.00) $1,707.79 $(40,292.21)
2 $681.67 $2,018.38 $327.10 $(1,208.77) $1,818.38 $(38,473.83)3 $695.30 $2,058.74 $333.64 $(1,154.21) $1,933.48 $(36,540.35)
4 $709.21 $2,099.92 $340.32 $(1,096.21) $2,053.23 $(34,487.12)
5 $723.39 $2,141.92 $347.12 $(1,034.61) $2,177.82 $(32,309.30)
6 $737.86 $2,184.76 $354.07 $(969.28) $2,307.40 $(30,001.89)
7 $752.62 $2,228.45 $361.15 $(900.06) $2,442.16 $(27,559.73)
8 $767.67 $2,273.02 $368.37 $(826.79) $2,582.27 $(24,977.47)
9 $783.02 $2,318.48 $375.74 $(749.32) $2,727.92 $(22,249.55)10 $798.69 $2,364.85 $383.25 $(667.49) $2,879.30 $(19,370.25)
11 $814.66 $2,412.15 $390.92 $(581.11) $3,036.61 $(16,333.63)
$ $ $ $( ) $ $( )
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Figure 7Representative Graph of Loan Payback over 20 Year Period
Applicable Incentives
The retrofits proposed will produce a profit over a 20-year period, but may also be
eligible for incentive programs that can help to reduce the initial capital cost of upgrading. The
Ontario Power Authority is offering coupons (until April 28th, 2013) for $5 off ENERGY
STAR qualified general purpose and specialty LEDs, resulting in savings of $250 for our
house if utilized. Unfortunately, incentives such as the City of Toronto Sustainable Energy
$(40,000.00)
$(30,000.00)
$(20,000.00)
$(10,000.00)
$-
$10,000.00
$20,000.00
Capital
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Technical Summary
Building Envelope
Foundation Insulation
The house foundation will be enhanced with XPS insulation installed on the interior wall
and slab surfaces. As the foundation accounts for a large percentage of the home's heat loss, 4" of
insulation will be added to the wall. 3" will be added to the floor slab to strike a balance between
insulation and headroom remaining in the basement after the retrofit. The recommended product
is Owens CorningFoamular F-150, which is available in many home improvement stores. The
XPS sections have tongue and groove edges, and will therefore be interlocked during
installation. Each section will be held in place by flush concrete anchor bolts and covered with
the homeowner's choice of wall and flooring material.
Exterior Insulation
The main floor wall will have 2" of XPS insulation added on to the exterior brick finish
to improve the overall wall performance. The upper story of the building is currently finished
with stucco which will be extended down to the foundation level When installing the stucco the
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argon filled units that, when installed properly, also provide minimal air leakage. The
recommended window replacement is the American Craftsman 70 double hung window, which
is readily available from home improvement stores. This retrofit is double-pronged in that it also
requires careful and competent installation to ensure proper window seals (a significant amount
of heat loss occurs by air infiltration, of which windows account for the vast majority).
Water Conservation
High Efficiency Flush Toilet(x3)
The Kohler Highline 2-piece 1.28 GPF high efficiency toilet provides savings of up to
16,500 gallons per year compared to the old 3.5 GPF toilets. The canister flush valve provides
consistent water volume and velocity for each flush, while the class five flushing technology
provides bulk waste flushing performance and good bowl cleanliness. It meets the flushing
performance requirements established by U.S. Environmental Protection Agency's Water Sense
program.
Showerhead (x2)
The new MOEN Banbury 5-Spray 4" showerhead 2.5 GPM replacing the old showerhead
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Washer
The old washer will be replaced with a high efficiency E.S. LG Electronics Front Load
Washer. Front load washers offer significant savings compared to top loaders. The extra-large 4
cu. Ft capacity means fewer loads, saving time and energy. The washer was awarded 2012
ENERGY STAR most efficient designation.
Electrical Systems
Lighting(x50)
The Philips 22-Watt (100W) A21 LED light bulb uses significantly less energy while
providing the same amount of light when compared to traditional incandescent light bulbs.
These LED lights meet federal requirements for energy efficiency to qualify as ENERGY
STAR Rated, and are exceedingly simple to install.
Mechanical Systems
Domestic Hot Water
The existing induced fan natural gas heater will be replaced with a 95% efficiency
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References
XPSfound athttp://www.homedepot.com/webapp/catalog/servlet/Search?storeId=10051&langId=-1&catalogId=10053&keyword=insulation+xps&Ns=None&Ntpr=1&Ntpc=1&selectedCatgry=Search+All
American Craftsman 70found athttp://www.homedepot.com/webapp/catalog/servlet/Search?storeId=10051&langId=-
1&catalogId=10053&keyword=double+glazed%20argon%20windows&Ns=None&Ntpr=1&Ntpc=1&selectedCatgry=Search+All
AO Smith GDHE-50-NGfound athttp://www.pexsupply.com/AO-Smith-GDHE-50-NG-50-Gallon-100000-BTU-Vertex-100-Power-Direct-Vent-Residential-Gas-Water-Heater-Nat-Gas
Power-Pipe R3-30found athttp://www.homedepot.ca/product/power-pipe-r3-30-drain-water-heat-recovery-unit/910916
Samsung NX583found athttp://www.homedepot.com/p/t/203673098?catalogId=10053&langId=-1&keyword=stove&storeId=10051&superSkuId=203669993&N=5yc1v&R=203673098
Philips 22-Watt (100W) A21found athttp://www.canadiantire.ca/AST/browse/3/HouseHome/Lighting/CompactFluorescentBulbs.jsp
Kohler Highline 2-piecefound athttp://www.homedepot.com/webapp/catalog/servlet/Search?storeId=10051&langId=-1&catalogId=10053&keyword=toliet&Ns=None&Ntpr=1&Ntpc=1&selectedCatgry=Search+All
http://www.homedepot.com/webapp/catalog/servlet/Search?storeId=10051&langId=-1&catalogId=10053&keyword=insulation+xps&Ns=None&Ntpr=1&Ntpc=1&selectedCatgry=Search+Allhttp://www.homedepot.com/webapp/catalog/servlet/Search?storeId=10051&langId=-1&catalogId=10053&keyword=insulation+xps&Ns=None&Ntpr=1&Ntpc=1&selectedCatgry=Search+Allhttp://www.homedepot.com/webapp/catalog/servlet/Search?storeId=10051&langId=-1&catalogId=10053&keyword=insulation+xps&Ns=None&Ntpr=1&Ntpc=1&selectedCatgry=Search+Allhttp://www.homedepot.com/webapp/catalog/servlet/Search?storeId=10051&langId=-1&catalogId=10053&keyword=double+glazed%20argon%20windows&Ns=None&Ntpr=1&Ntpc=1&selectedCatgry=Search+Allhttp://www.homedepot.com/webapp/catalog/servlet/Search?storeId=10051&langId=-1&catalogId=10053&keyword=double+glazed%20argon%20windows&Ns=None&Ntpr=1&Ntpc=1&selectedCatgry=Search+Allhttp://www.homedepot.com/webapp/catalog/servlet/Search?storeId=10051&langId=-1&catalogId=10053&keyword=double+glazed%20argon%20windows&Ns=None&Ntpr=1&Ntpc=1&selectedCatgry=Search+Allhttp://www.pexsupply.com/AO-Smith-GDHE-50-NG-50-Gallon-100000-BTU-Vertex-100-Power-Direct-Vent-Residential-Gas-Water-Heater-Nat-Gashttp://www.pexsupply.com/AO-Smith-GDHE-50-NG-50-Gallon-100000-BTU-Vertex-100-Power-Direct-Vent-Residential-Gas-Water-Heater-Nat-Gashttp://www.pexsupply.com/AO-Smith-GDHE-50-NG-50-Gallon-100000-BTU-Vertex-100-Power-Direct-Vent-Residential-Gas-Water-Heater-Nat-Gashttp://www.pexsupply.com/AO-Smith-GDHE-50-NG-50-Gallon-100000-BTU-Vertex-100-Power-Direct-Vent-Residential-Gas-Water-Heater-Nat-Gashttp://www.homedepot.ca/product/power-pipe-r3-30-drain-water-heat-recovery-unit/910916http://www.homedepot.ca/product/power-pipe-r3-30-drain-water-heat-recovery-unit/910916http://www.homedepot.ca/product/power-pipe-r3-30-drain-water-heat-recovery-unit/910916http://www.homedepot.ca/product/power-pipe-r3-30-drain-water-heat-recovery-unit/910916http://www.homedepot.com/p/t/203673098?catalogId=10053&langId=-1&keyword=stove&storeId=10051&superSkuId=203669993&N=5yc1v&R=203673098http://www.homedepot.com/p/t/203673098?catalogId=10053&langId=-1&keyword=stove&storeId=10051&superSkuId=203669993&N=5yc1v&R=203673098http://www.homedepot.com/p/t/203673098?catalogId=10053&langId=-1&keyword=stove&storeId=10051&superSkuId=203669993&N=5yc1v&R=203673098http://www.canadiantire.ca/AST/browse/3/HouseHome/Lighting/CompactFluorescentBulbs.jsphttp://www.canadiantire.ca/AST/browse/3/HouseHome/Lighting/CompactFluorescentBulbs.jsphttp://www.homedepot.com/webapp/catalog/servlet/Search?storeId=10051&langId=-1&catalogId=10053&keyword=toliet&Ns=None&Ntpr=1&Ntpc=1&selectedCatgry=Search+Allhttp://www.homedepot.com/webapp/catalog/servlet/Search?storeId=10051&langId=-1&catalogId=10053&keyword=toliet&Ns=None&Ntpr=1&Ntpc=1&selectedCatgry=Search+Allhttp://www.homedepot.com/webapp/catalog/servlet/Search?storeId=10051&langId=-1&catalogId=10053&keyword=toliet&Ns=None&Ntpr=1&Ntpc=1&selectedCatgry=Search+Allhttp://www.homedepot.com/webapp/catalog/servlet/Search?storeId=10051&langId=-1&catalogId=10053&keyword=toliet&Ns=None&Ntpr=1&Ntpc=1&selectedCatgry=Search+Allhttp://www.homedepot.com/webapp/catalog/servlet/Search?storeId=10051&langId=-1&catalogId=10053&keyword=toliet&Ns=None&Ntpr=1&Ntpc=1&selectedCatgry=Search+Allhttp://www.canadiantire.ca/AST/browse/3/HouseHome/Lighting/CompactFluorescentBulbs.jsphttp://www.homedepot.com/p/t/203673098?catalogId=10053&langId=-1&keyword=stove&storeId=10051&superSkuId=203669993&N=5yc1v&R=203673098http://www.homedepot.com/p/t/203673098?catalogId=10053&langId=-1&keyword=stove&storeId=10051&superSkuId=203669993&N=5yc1v&R=203673098http://www.homedepot.ca/product/power-pipe-r3-30-drain-water-heat-recovery-unit/910916http://www.homedepot.ca/product/power-pipe-r3-30-drain-water-heat-recovery-unit/910916http://www.pexsupply.com/AO-Smith-GDHE-50-NG-50-Gallon-100000-BTU-Vertex-100-Power-Direct-Vent-Residential-Gas-Water-Heater-Nat-Gashttp://www.pexsupply.com/AO-Smith-GDHE-50-NG-50-Gallon-100000-BTU-Vertex-100-Power-Direct-Vent-Residential-Gas-Water-Heater-Nat-Gashttp://www.homedepot.com/webapp/catalog/servlet/Search?storeId=10051&langId=-1&catalogId=10053&keyword=double+glazed%20argon%20windows&Ns=None&Ntpr=1&Ntpc=1&selectedCatgry=Search+Allhttp://www.homedepot.com/webapp/catalog/servlet/Search?storeId=10051&langId=-1&catalogId=10053&keyword=double+glazed%20argon%20windows&Ns=None&Ntpr=1&Ntpc=1&selectedCatgry=Search+Allhttp://www.homedepot.com/webapp/catalog/servlet/Search?storeId=10051&langId=-1&catalogId=10053&keyword=double+glazed%20argon%20windows&Ns=None&Ntpr=1&Ntpc=1&selectedCatgry=Search+Allhttp://www.homedepot.com/webapp/catalog/servlet/Search?storeId=10051&langId=-1&catalogId=10053&keyword=insulation+xps&Ns=None&Ntpr=1&Ntpc=1&selectedCatgry=Search+Allhttp://www.homedepot.com/webapp/catalog/servlet/Search?storeId=10051&langId=-1&catalogId=10053&keyword=insulation+xps&Ns=None&Ntpr=1&Ntpc=1&selectedCatgry=Search+Allhttp://www.homedepot.com/webapp/catalog/servlet/Search?storeId=10051&langId=-1&catalogId=10053&keyword=insulation+xps&Ns=None&Ntpr=1&Ntpc=1&selectedCatgry=Search+All8/12/2019 Sustainable Buildings Assignments
47/47
Appendix 1
Total Time Taken for Retrofit = 42 days based on an 8 hour day.
Retrofit
Material
Cost
Number
of hours
Labour
Cost
Material +
Labour Cost
Natural gas
Energy
Savings
(Kwh)
Electricity
Energy
Savings
(Kwh)
Water
Savings
(gallons)
Cost($)/
Saving
unit(kw
h/gal)
Building
Envelope XPS 3" 2760.00 97 7728.00 10584.60 15646 0.034
XPS 4" 477.50 17 1337.00 1831.21 9068 0.010
XPS 2" 191.00 7 534.80 732.48 9068 0.004
Double glazed
argon fill 2850.00 100 7980.00 10929.75 1295 0.422
Air tightening 0.00 0 0.00 0.00 10846 0.000
Mechanical Condensing Boiler 2000.00 70 5600.00 7670.00 2584 0.148+ Drain heat
recovery 555 20 1554.00 2128.43
Gas stove (x1) 1100.00 6 480 1580.00 360 0.586
Electricity
Phillips LED
lighting (x50) 2750.00 0.00 0.00 2750.00 4680 0.029
Water
Kohler high EFF
flush toilet (x3) 534 6 480 1020.00 7992 0.006
Moen Banbury
showerhead (x2) 64 0 0 64.00 23775 0.0001
E.S. LG ElectronicsFront Load
Washer (x1) 889 6 480 1369.00 33 6600 0.007
Totals 14170.5 329 26173.8 40344.3 48507 5073 38367