Draft
STANDARD SAVINGS ESTIMATION PROTOCOL FOR
VAV CONVERSION
Submitted to
REGIONAL TECHNICAL FORUM
Submitted by
SBW CONSULTING, INC.
2820 Northup Way, Suite 230
Bellevue, WA 98004
January 28, 2011
Standard Savings Estimation Protocol for VAV Conversion
TABLE OF CONTENTS
1. PURPOSE............................................................................................................ 1
2. DEFINITION OF KEY TERMS ..................................................................................... 1
3. ELIGIBLE PROJECTS ............................................................................................... 1
4. REQUIRED KNOWLEDGE AND SKILLS OF PRACTITIONER ................................................... 2
5. REQUIRED COMMISSIONING .................................................................................... 2
6. DATA COLLECTION REQUIREMENTS ........................................................................... 3
6.1. Fan and Fan Motor Specifications ..................................................................................... 3
6.2. Fan Operations ................................................................................................................... 3
6.3. Post-Period Electrical Measurements................................................................................ 3
6.4. Facility Control System Post-Period Trend Logs ................................................................ 4
6.5. Alternate Baseline and Post measurements ..................................................................... 5
6.6. Typical Meterological Year (TMY) Weather Data .............................................................. 5
6.7. Inputs for Cost-Effectiveness Analysis ............................................................................... 5
7. PROVISIONAL DATA REQUIREMENTS ......................................................................... 6
8. SAVINGS ESTIMATION STEPS ................................................................................... 6
8.1. Compute Savings for Trend Log Intervals .......................................................................... 6
8.1.1. Fan Savings and Post Airflow for Trend Log Intervals ........................................................ 7
8.1.2. Heating Savings for Trend Log Intervals ............................................................................. 7
8.1.3. Cooling Savings for Trend Log Intervals .............................................................................. 8
8.2. Annualized Savings: Determined by OAT and Facility Schedule........................................ 9
8.3. Alternative Method............................................................................................................ 9
8.4. Total Energy Savings ........................................................................................................ 10
8.5. Life Cycle Costs and Benefits ........................................................................................... 10
9. SAMPLING PROCEDURE ........................................................................................ 10
10. RELATIONSHIP TO OTHER PROTOCOLS AND GUIDELINES ............................................. 11
11. TYPICAL COST OF APPLYING THIS PROTOCOL ........................................................... 11
12. USER’S GUIDE TO SAVINGS CALCULATOR ................................................................ 12
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Standard Savings Estimation Protocol for VAV Conversion
1. PURPOSE
This protocol establishes a method by which annual electrical energy savings (kWh) can be estimated for
a Constant Volume (CV) HVAC system that has been upgraded to a Variable Air Volume (VAV) system by
the addition of a Variable Frequency Drive (VFD) and new terminal units. VAV systems use less energy
than CV systems as they reduce airflow and thus require less energy to condition the air that is delivered
to the space. Fan energy is also reduced from the reduced airflow and further reduced by the efficient
nature of the VFD.
This protocol specifies minimum acceptable data collection requirements and the method by which
these data are to be used in computing savings for CV to VAV conversion projects. For some data
elements, alternative sources of data, considered to be of superior quality, are also defined and are
allowed. Savings are computed using the Excel workbook (to be developed) that accompanies this
document to ensure standardized application of the savings estimation methods.
2. DEFINITION OF KEY TERMS
Project. Installation of new variable volume terminal units as needed to meet conditioning load for the
portion of a building served by a single air handler and installation of VFDs on the supply and return fans
for that air handler. The volume of air to conditioned spaces varies with respect space cooling and
heating load. The VFD speed on the supply fan is determined by the pressure in the distribution air duct.
If present, the VFD speed on the return fan is determined by either the supply fan speed or building
pressure differential (either between interior spaces or relative to ambient).
Baseline. This modifier; as in baseline control strategy has one of two meanings. For HVAC systems
upgraded in existing facilities, it refers to the period prior to the upgrade. For HVAC systems in new
construction, there is no such period. For them, the term baseline refers to the design specification for
the HVAV system without the efficiency upgrade.
Post. This modifier; as in post current trend log, refers to the period after the fan unit VFD upgrade is
installed and fully commissioned.
Commissioning. This is the process of testing and adjustment required to ensure that the VAV system is
operating according to its design intent.
3. ELIGIBLE PROJECTS
The following criteria define eligible projects.

Heating for the system must be electric resistance. Cooling may be either DX (direct expansion) or
chilled water coil. However, if the alternate method (see section 6.5) is used, only DX is eligible.

Fan motors must be single speed motors.
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Standard Savings Estimation Protocol for VAV Conversion

If new construction or major renovation, the HVAC systems must not be subject to local energy code
requirements for variable air volume systems.

The air distribution must be a single duct system. Multi-zone and dual duct systems are excluded,
unless using the alternate method (see section 6.5).

Systems with reheat in the terminal units are eligible (baseline terminal reheat units converted to
VAV terminal units with reheat). Systems with other zone heating units such as perimeter
baseboards are excluded.

Systems that are designed with simultaneous heating and cooling are excluded. Terminal reheat
must be disabled, when the cooling coil is active

Damper control of mixed air temperature (mixing of outside and return air) must be the same for
both the baseline and post conditions. The exception for this is if the alternative baseline and post
measurements and calculations are made (see section 6.5).

No other significant building changes that affect the heating and cooling loads such as improved
thermal envelope, lighting changes, schedule or occupancy changes occur between the baseline and
post periods

VFD %speed must be available as a point on the building control system that can be captured in a
trend log.

The cost of implementing this protocol must not make the VFD project economically unattractive.
4. REQUIRED KNOWLEDGE AND SKILLS OF PRACTITIONER
The practitioner who has lead responsibility for applying this protocol must have a full understanding of
the following:

Appropriate safety procedures for work involving HVAC systems and the measurement equipment
required by this protocol

This protocol and the accompanying savings calculator.
The practitioner must also be able to successfully perform the following tasks:

Identify, by inspection, the HVAC system configuration, equipment and control settings to verify
eligibility and complete the commissioning tasks.

Identify, by interview and inspection the facility operations schedule.

Install and operate true power, current and temperature loggers and obtain necessary trend logs
from facility control systems.
5. REQUIRED COMMISSIONING
This protocol may only be used for HVAC systems that pass the following commissioning tests:
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Standard Savings Estimation Protocol for VAV Conversion

Fan (supply and if present, return) unit is responding to the control sensor signal and is monitored
from the facility control system at the beginning of the trend log period (see section 6.4).

Practitioner confirms that installation commissioning tests demonstrated correct operation of
outside, return and exhaust dampers and the VAV terminal units.

Practitioner confirms by examining a plot of %speed vs. current that the fan unit(s) was responding
to the control signal at least 90% of the trend log period (see 6.4).
6. DATA COLLECTION REQUIREMENTS
The following data must be collected and entered into the savings calculator. The minimum acceptable
procedure for obtaining the data is specified. In some cases, alternative procedures are allowed which
would provide data of higher quality.
6.1. Fan and Fan Motor Specifications

Full Load Air Flow. Taken from the equipment schedule on the facility’s mechanical plan.
Alternatively, this value may be determined by: (1) inspecting facility control system trend logs of
fan flow rate, if the system has a calibrated flow sensor and the log contains values at or near 100%
speed or (2) taken from an air balance report.

Cooling efficiency. Obtain the performance of the cooling system (DX or chiller). The Integrated
Part Load Value (IPLV) can be obtained from the manufacturer’s literature, which should be part of
the contractor submittals.

Fan Motor HP. Obtained from the motor name plate of the supply fan and return fan, if present. Full
load fan kW (computed by the savings calculator) should not exceed 115% of fan motor nameplate
HP times 0.746.
6.2. Fan Operations

Facility Operations Schedule. Obtained from facility operator. Obtain the fan hours of operation by
hour of day, day of week and season. If fan unit has different operation modes determined by the
facility’s operations schedule, e.g., setback of airflow during night and weekend hours, determine
the periods for each of these modes (hour of day, day of week and season).

Weather Station. If OAT is a significant determinant, identify the TMY (Typical Meteorological Year)
weather station which is closest to the project site.
6.3. Post-Period Electrical Measurements

Trend Log of fan VFD Power. A data logger is installed to measure 15-minute interval true RMS
power on the circuit powering the supply and return fan VFDs. The measurement period must
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Standard Savings Estimation Protocol for VAV Conversion
include periods of the system operating in both heating and cooling mode. If the fan unit speed is
also determined by facility operating schedule the period must also capture all the different
operating modes.

Trend log of Terminal Unit Current. Data loggers installed to measure 15-minute interval current for
circuits serving the terminal units. This can be panel or switch gear level measurement which
combines more than one unit. It can also be for a random sample of units as described in section 9.
The measurement period must include at least 3 weeks of terminal unit heating use. Note: some
units may have small fan loads during non-heating periods, which should be ignored.

Trend log of Central Heating Coil Current. If present, data loggers installed to measure 15-minute
interval current of all heating coils located in the air handler or air distribution system other than the
terminal units. The measurement period must include at least 3 weeks of heating coil use.
6.4. Facility Control System Post-Period Trend Logs
All trend log data must be collected concurrently for all required variables, during the same period as
the fan VFD power measurements in section 6.3.

Trend Log of VFD % Speed. The facility’s control system is programmed to record VFD % speed for
the supply fan and, if present, return fan, at 15-minute intervals.

Trend Log of Mixed Air Temperature. The facility’s control system is programmed to record the
mixed air temperature (MAT) in the air handler at 15-minute intervals. This is the air temperature
after mixing of outside and return air and before any heating or cooling coils. If the control system
does not have this control point available for trending, a temperature logger can be placed in the air
handler to capture this data.

Trend Log of supply Air Temperature. The facility’s control system is programmed to record the
supply air temperature (SAT) in the air handler at 15-minute intervals. This is the air temperature
immediately downstream of the cooling coil. If the control system does not have this control point
available for trending, a temperature logger can be placed in the air handler to capture this data.

Space Temperature. The facility control system is programmed to record the air temperature, at 15minute intervals, in the conditioned space for a random sample of locations, as defined in section 9.
If the control system does not have this information for trending, then temperature loggers can be
placed near thermostats (temperature sensors) in the space to capture this data.

Trend Log of VFD Facility OAT. The facility’s control system is programmed to record OAT at 15minute intervals. If OAT is not available from the facility’s control system or appears unreliable, an
OAT data recorder should be installed to create this trend log.
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6.5. Alternate Baseline and Post measurements
This alternative supersedes the measurements in section 6.3 and 6.4 and can only be used if the system
cooling is by DX and the project is retrofit. This method will also capture energy savings associated with
other changes to the HVAC system that may have occurred such as repair of economizers and changes in
MAT controls.

One-Time Baseline Fan Power. Take a one-time true RMS power measurement on the circuit
serving the supply fan, and if present, the return fan.

Trend Log of Post Fan VFD Power. A data logger is installed to measure 15-minute interval true RMS
power on the circuit powering the supply and return fan VFDs. The measurement period must
include periods of the system operating in both heating and cooling mode, during the post period. If
the fan unit speed is also determined by facility operating schedule the period must also capture all
the different operating modes.

Trend log of Baseline and Post Terminal Unit Current. Data loggers installed to measure 15-minute
interval current for circuits serving the terminal units. This can be panel or switch gear level
measurement which combines more than one unit. It can also be for a random sample of units as
described in section 9. The measurement period must include at least 3 weeks of terminal unit
heating use during the baseline and post periods. Note: some units, in the post period, may have
small fan loads during non-heating periods, which should be ignored.

Trend log of Baseline and Post Central Heating Coil Current. If present, data loggers installed to
measure 15-minute interval current of all heating coils located in the air handler or air distribution
system other than the terminal units. The measurement period must include at least 3 weeks of
heating coil use during the baseline and post periods.

Trending of baseline and post DX cooling. Install true RMS power loggers on the cooling
components (compressors and condensers) of the cooling equipment solely dedicated to the
converted HVAC system. Measurements that combine components at the panel or switchgear are
allowed.
6.6. Typical Meterological Year (TMY) Weather Data

TMY OAT. Typical Hourly OAT data for Pacific Northwest weather stations are contained in the
savings calculator to be used in estimating annual saving. Data from the station selected in 6.2 will
be used.
6.7. Inputs for Cost-Effectiveness Analysis
The following data need to be gathered to support the cost/benefit analysis feature of the calculator.

Project completion date.
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Standard Savings Estimation Protocol for VAV Conversion

Measure cost. The initial cost of installing the new equipment, including all materials and labor
costs. This is the full cost of the project. This value must be supported by invoices or other
documentation.

Sector. Possible values are Agricultural, Industrial, and Commercial.
The following values are used in the cost-effectiveness calculation, but are pre-set in the calculator.

Electric shape. The calculator assigns an appropriate electric shape based operation data describe in
section 6.2 and the profile of savings computed from the trend log data.

Periodic costs or savings. Any non-annual periodic costs associated with the measure, and the
associated time period. These are incremental costs of the efficient option over the costs of the
baseline. For a fan VFD, the calculator restricts this value to be zero.

O&M costs or savings. Annual O&M costs or savings associated with the measure. These are costs
or savings which occur with the efficient option that would not occur with the baseline option, i.e.
the costs associated with VFD maintenance. Interview the building operator to determine the likely
cost of filter maintenance for the VAV terminal units.

Non-energy benefits. Annual non-energy related costs or savings associated with the measure. The
calculator restricts this value to be zero.

Measure life. Number of years the measure is expected to be in effect. For this project, the
calculator restricts this value to be 10 years.
7. PROVISIONAL DATA REQUIREMENTS
During the period that the RTF classifies this protocol as Provisional, the following data requirements
will be in force:

Alternate Measurements. For retrofit projects, with DX cooling, the alternate measurements
(section 6.5) must be taken in addition to those required by sections 6.3 and 6.4
8. SAVINGS ESTIMATION STEPS
Savings are estimated using the savings calculator that accompanies this protocol (to be developed).
Savings are estimated as follows.
8.1. Compute Savings for Trend Log Intervals

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Data Synchronization. Start times for all trend log intervals are synchronized by moving each to the
closest standard interval starts times of 0, 15, 30 and 45 minutes after the start of each hour.
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Standard Savings Estimation Protocol for VAV Conversion

Total Heating Power. For each interval, all terminal unit power measurements are summed. If
terminal units were sampled, this is a sample weighted sum. All central heating coil measurements
are added to the system.

Total Cooling Power. For each interval, cooling component power measurements are summed.

Average Space Temperature. For each interval, the sampled space temperature measurements are
averaged.
8.1.1. Fan Savings and Post Airflow for Trend Log Intervals

Fraction of Full Flow. Equals the fraction of full speed from the %speed trend log.

Post Airflow (Post_cfm). Equals the fraction of full speed times the full speed rated airflow.

Fan Motor Full Load kW. Average the kW values corresponding to %speed values greater than 99%.
If there are any such values, use this average to define fan full load kW. If not, an exponential curve
fit to the power vs. speed relationship is used to estimate this value at 100% speed.

Baseline fan kW. Calculate baseline kW as the product of the fan motor full load kW and the VFD
efficiency (default = 97%).

Fan Savings for Trend Log Period. Calculate the savings as the difference between the constant
baseline fan kW and measured post kW for each trend log interval.
8.1.2. Heating Savings for Trend Log Intervals

Post Heat (Post_heat). Convert the post measured heat to Btu/hr. by multiplying the trended heat
kW value by 3,413.

Post Delivered Air Temperature (Post_DAT). Calculate the post delivered air temperature by the
equation:
Post_DAT = MAT + (Post_heat / 1.1 X Post_cfm)
Where, MAT is the measured mixed air temperature trended value, and 1.1 converts cfm to BTU
/ degree F.

Heating Load on the Conditioned Space (Space_H_load). Calculate the amount of heating load on
the conditioned space by the equation:
Space_H_load = 1.1 X Post_cfm X (Post_DAT – Space_temp)
Where, Space_temp is the averaged space temperature trended value, and 1.1 converts cfm to
BTU / degree F.

Baseline Delivered Air Temperature (Base_DAT). Calculate the delivered air temperature at the
baseline airflow rate required to meet the space heat load by the equation:
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Standard Savings Estimation Protocol for VAV Conversion
Base_DAT = MAT + (Space_H_load / 1.1 X Base_cfm)
Where, Base_cfm is the full speed rated airflow value, and 1.1 converts cfm to BTU / degree F.

Baseline Heat (Base_heat). Calculate the amount of heat that would have been required at the
baseline constant airflow rate by the equation:
Base_heat = (1.1 X Base_cfm X (Base_DAT – Space_temp)) / 3,413
Where, 3,413 is the conversion into units of kW, and 1.1 converts cfm to BTU / degree F.

Heat Savings for Trend Log Period. Calculate the savings by the equation
Heat Savings = Base_Heat – (Post_Heat / 3,413)
Where, 3,413 is the conversion into units of kW.
8.1.3. Cooling Savings for Trend Log Intervals

Post Cool (Post_Cool). Calculate the post cooling to the supply air temperature by the equation:
Post_Cool = 1.1 X Post_cfm X (MAT – Post_SAT)
Where, Post_SAT is the measured air temperature downstream of the cooling coil,MAT is the
measured mixed air temperature trended value, and 1.1 converts cfm to BTU / degree F.

Post Cool kW. Calculate the post cooling by multiplying Post_Cool by the cooling efficiency
(calculator derives COP based on rated IPLV and units of that rating) and dividing by 3,413.

Cooling Load on the Conditioned Space (Space_C_load). Calculate the amount of cooling load on
the conditioned space by the equation:
Space_C_load = 1.1 X Post_cfm X (Space_temp - Post_SAT)
Where, Space_temp is the measured room temperature trended value, and1.1 converts cfm to
BTU / degree F.

Baseline Cooled Supply Air Temperature (Base_SAT). Calculate the air temperature downstream of
the cooling coil at the baseline airflow rate required to meet the space cooling load by the equation:
Base_SAT = MAT - (Space_C_load / 1.1 X Base_cfm)
Where, Base_cfm is the full speed rated airflow value, and1.1 converts cfm to BTU / degree F.

Baseline Cool kW (Base_Cool). Calculate the amount of cooling that would have been required at
the baseline constant airflow rate by the equation:
Base_cool = (1.1 X Base_cfm X (Spac_temp - Base_SAT ) X COP) / 3,413
Where, 3,413 is the conversion into units of kW, COP is the cooling efficiency of the cooling
system, and 1.1 converts cfm to BTU / degree F.

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Cooling Savings for Trend Log Period. Calculate the savings by the equation
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Standard Savings Estimation Protocol for VAV Conversion
Cooling Savings = Base_ Cooling – (Post_ Cooling / 3,413)
Where, 3,413 is the conversion into units of kW.
8.2. Annualized Savings: Determined by OAT and Facility
Schedule
Fan, heating and cooling savings are annualized as follows:

Average Savings by Trend Log Bin. For each operating mode, average kW savings by two degree
temperature bins for all trend log intervals during operating hours, as defined by facility operations
schedules (Section 6.2).

Operating Hours by TMY Bin. For each operating mode, divide the 8,760 TMY OAT data into two
degree bins and compute frequency of annual operating hours for each temperature bin, as defined
by facility operations schedules (Section 6.2).

Average Savings by TMY Bin. For each operating mode, TMY bin average savings equal trend log
average bin savings for each matching bin. Extrapolate average savings for TMY bins that do not
have trend log data. For fan savings, higher temperature bins are extrapolated by a linear equation
fit to the trend log bins above 60 degrees and lower temperature bins by a linear equation fit to the
bins below 55 degrees. For heating savings, values are extrapolated by a best fit equation to the
trend log bins. Negative values will likely occur at temperatures greater than about 60F and should
be set to zero. For cooling savings, values are extrapolated by a best fit equation to the trend log
bins. Negative values will likely occur at temperatures less than about 60F and should be set to zero.

Saving by Bin. In each operating mode, for each TMY bin, multiply the average bin savings by the
number of operating hours in each bin, to get kWh savings in each bin.

Annual Savings. Sum the kWh values across the TMY bins for both operating modes.
8.3. Alternative Method
This method assumes that data is collected in accordance with sections 6.1, 6.2, 6.5 and 6.6.

Data Synchronization. Start times for all trend log intervals are synchronized by moving each to the
closest standard interval starts times of 0, 15, 30 and 45 minutes after the start of each hour.

Average Heating Power by Trend Log Bin. For each interval, all terminal unit power measurements
are summed. If terminal units were sampled, this is a sample weighted sum. All central heating coil
measurements are added to the system. Base_Heat is the values during baseline period and
Post_Heat is the values during the post period. For each operating mode, average kW by two
degree temperature bins for all trend log intervals during operating hours, as defined by facility
operations schedules (Section 6.2).
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Standard Savings Estimation Protocol for VAV Conversion

Average Cooling Power by Trend Log Bin. For each interval, cooling component power
measurements are summed. Base_Cool is the values during baseline period and Post_Cool is the
values during the post period. For each operating mode, average kW by two degree temperature
bins for all trend log intervals during operating hours, as defined by facility operations schedules
(Section 6.2).

Average Fan Power by Trend Log Bin. Base_Fan is from one-time measurement, assumed to be
constant for all baseline intervals per the operating schedule. Post_Fan is from the trend logger. For
each operating mode, average kW by two degree temperature bins for all trend log intervals during
operating hours, as defined by facility operations schedules (Section 6.2).

Average Power by TMY Bin. For each operating mode, TMY bin average power (heat, cool, and fan)
equal trend log average bin power for each matching bin. Extrapolate average power for TMY bins
that do not have trend log data. For fan power, higher temperature bins are extrapolated by a linear
equation fit to the trend log bins above 60 degrees and lower temperature bins by a linear equation
fit to the bins below 55 degrees. For heat power, values are extrapolated by a best fit equation to
the trend log bins. Negative values will likely occur at temperatures greater than about 60F and
should be set to zero. For cool power, values are extrapolated by a best fit equation to the trend log
bins. Negative values will likely occur at temperatures less than about 60F and should be set to zero.

Annual Fan, Heat and Cool Savings. For fan, heat and cool sum the difference between baseline and
post power values times the number of hours in each TMY bin for each operating mode.
8.4. Total Energy Savings
For either method, total energy savings are then obtained as the sum of fan, heat and cooling savings.
8.5. Life Cycle Costs and Benefits
The calculator contains a model called ProCost which computes life cycle costs and benefits. Inputs to
the model include the estimates of first-year savings described in section 8 and the cost-effectiveness
input data described in section 6. ProCost computes life cycle costs and benefits from the economic
perspectives of the end user, utility, and region. The calculator can be used to review these results.
9. SAMPLING PROCEDURE
Terminal units may be sampled if it reduces the cost of measuring current for all units. A list of all units
and their rated kW heating capacity (from the mechanical equipment schedule) must be prepared and
entered into the calculator. The calculator will select a sample of units form measurement that will
provide 80/20 precision in the estimation of total unit kW.
The calculator will also provide a list of four random selected terminal units for space temperature
measurements. These are accomplished as specified in section 6.4. This sample is always required. If
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Standard Savings Estimation Protocol for VAV Conversion
terminal units are not sampled, a list of the terminal units is entered into the calculator (without heating
capacities) so that the random sample can be drawn.
10. RELATIONSHIP TO OTHER PROTOCOLS AND GUIDELINES
The relationship between this protocol and other relevant protocols and guidelines is as follows:

International Performance Measurement and Verification Protocol – 2007 (IPMVP), Efficiency
Valuation Organization. This protocol is consistent with Option A - Retrofit Isolation: Key Parameter
Measurement described in the IPMVP, as a number of key parameters are measured (fan motor
current, VFD %speed and OAT).

Sampling Reference Guide, BPA. Sampling terminal units is allowed under this protocol and is
consistent with the BPA guide.

Regression Reference Guide, BPA. This protocol uses regression techniques to to extrapolate savings
to temperatures beyond those observed in the trend logging period. The application of these
regression techniques is consistent with the BPA guide.
11. TYPICAL COST OF APPLYING THIS PROTOCOL
Shown below is an estimate of typical cost of applying this protocol. Expense for the alternate pre and
post measurements, allowed by this protocol, are not included in this estimate of typical cost.
Item
Quantity $ / Hour Rental Total Cost
Equipment
Power Meter
1
100
100
Power Loggers
3
200
600
Current Loggers
10
50
500
Temperature Loggers
4
50
200
Labor
Practitioner
Travel
3
110
330
Scheduling
1
110
110
Facility Operator Interview
2
110
220
Project Inspection
2
110
220
Electrical Measurements
1
110
110
Install/Remove Logger
8
110
880
Savings Estimate
4
110
440
Travel
2
90
180
Electrical Measurements
4
90
360
Electrician
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Standard Savings Estimation Protocol for VAV Conversion
Item
Quantity $ / Hour Rental Total Cost
Controls Specialist
Setup and Export Trend Logs
Total
3
150
450
$4,700
12. USER’S GUIDE TO SAVINGS CALCULATOR
[To be developed once this protocol is finalized and savings calculator is developed. This Guide and the
Calculator are outside the scope of SBW’s current contract.]
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