Triangle Tube Boiler Fuel Cost Savings Worksheet

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Triangle Tube Boiler Fuel Cost Savings Worksheet
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Prepared for
Customer Name
Day Phone
Street
Evening Phone
Street
Cell Phone
City, State, Zip
email
Heat lost in Flue gas 5
Heat gained by condensing 10
Heat extracted without condensing 85
Total Efficiency 95
Triangle Tubes boilers gain efficiency over
older boilers by Modulating running
longer at lower temperatures
Condensing gaining heat from flue gas vapors
Outdoor air Old boilers send indoor air
through the boiler and up the chimney, wasting
heat and
creating drafts. Triangle Tube boilers use
outside air for combustion, eliminating this
waste. Outdoor Reset Adjusts the
temperature of the system based on the outside
temperature. As the outdoor
temperature increases, the boiler system
temperature decreases, improving efficiency.
Fuel Cost Evaluation
To measure the impact of changing to a new
Natural Gas boiler from another fuel in the old
boiler.
Please skip to the other side if your new boiler
will use the same fuel as the existing boiler.
Fuel Heat Content Ratio
Natural Gas
Measures the relative heat content of a unit of
fuel.
Old Fuel Therms CCF
Oil (gallons) 1.39 1.35
Natural Gas 1 1
Propane (gallons) 0.92 0.90
Electric (kWh) 0.034 0.033
Example Old Fuel is Oil and New Fuel is Natural
Gas measured in Therms. The Fuel Heat Content
Ratio is 1.39
Fuel Cost Ratio
Measures the relative cost of a unit of fuel.
Fuel Cost Ratio Cost per unit of
New Fuel / Cost per unit of Old Fuel.
Example
New Fuel Natural Gas 1.45 / therm Old
Fuel Oil 2.95 / gallon
Example
Fuel Cost Ratio 1.45 / 2.95 0.49

/
New Fuel Cost
Old Fuel Cost
Fuel Cost Ratio (for next page)
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Boiler Efficiency Evaluation
Information from Existing (Old) Boiler Rating
Plate
Boiler Output
Boiler Input
BTU/Hour
BTU/Hour
Existing Boiler Efficiency Calculation
Actual efficiency for older, Non-Modulating
Boilers is approximately 5 less than the rated
Output / Input Ratio. This reduction is due to
standby losses, chimney drafting losses,
standing pilot losses, use of indoor combustion
air, lack of outdoor reset, and other factors.
Triangle Tube boilers virtually eliminate all of
these losses.
Approx. efficiency of the existing boiler
EFFOld (Boiler Output/Boiler Input-0.05) X
100
Example
Boiler Plate Data Output 105,000 BTU/Hr,
Input 130,000 BTU/Hr.
EFFOld (
/
0.05) X 100

105,000
130,000
76
Your calculation
EFFOld (
/
0.05) X 100

Boiler Efficiency Ratio
Boiler Eff. Ratio
EFFOld
EFFNew
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Triangle Tube EFFNew 95
Example Boiler Eff. Ratio
76
95
80
/

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95
Boiler Eff. Ratio
Total Fuel Cost Savings
X
X
X

Annual fuel cost with old boiler.
Fuel Heat Content Ratio
Boiler Eff. Ratio (from above)
Fuel Cost Ratio
Annual fuel cost with Triangle Tube boiler.
(Skip if not changing fuels.)
(Skip if not changing fuels.)
Cost Savings

Annual fuel cost with Triangle Tube boiler.
Annual fuel savings with Triangle Tube boiler.
Annual fuel cost with old boiler.
To achieve the highest efficiency, outdoor
reset must be used. The numbers shown here
are a basic comparison based on history. Actual
fuel costs will vary depending on actual fuel
prices, weather, degree days, thermostat
settings, and overall weatherproofing of the
building.
Mkt Fuel Savings 2010-07