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Below is a sample Energy Survey to show you how Stu Nussbaum will evaluate your present energy usage and make recommendations for your savings.  If you wish to conduct your own survey, please print out one of the forms available on the  Energy Savings page, then follow the examples provided below.

This survey is for a fictitious company, but uses typical values and savings that have been realized by clients.

The conditions in our sample survey as determined by Stu Nussbaum are:

• Lights are on 6 days per week
• Lights are also on 10 hours per day
• 12.5 cents is the per Kilowatt Hour cost of energy
• Air conditioning is on 6 months per year

 Energy Survey / Return on Investment

 

PREPARED FOR:  A&A Office Furniture  Anywhere, USA

PREPARED BY:  Stuart Nussbaum  (916) 995-9456

Website:   http://members.gotnet.net/lighting  Email: lighting@gotnet.net

 
 

Present Condition 200 fluorescent fixtures - each using (4) 34 Watt tubes. 160 Watts per fixture includes the ballast.

Recommendation 200 Retrofitted fixtures - each using (2) 32 Watt T-8 tubes.   78 Watts per fixture includes the High Performance Electronic ballast.

 

1	32,000	Total Watts	15,600	See below for details
2	$    00.39	Annual Power Costs Per Watt	$    00.39	See Below for Energy Cost Guide
3	$ 12,480	*Power Costs - 1st Year	$  6,084	#1 x #2
4	$ 13,104	*Power Costs - 2nd Year	$  6,388	#3 x 105%
5	$ 13,759	*Power Costs - 3rd Year	$  6,708	#4 x 105%
6	$ 39,343	*Total Power Costs	$ 19,180	Add #3 thru #5
7		Total Lamp Replacement Costs	$	Lamp Quantity x Cost
8	$ 39,343	<---------------       GRAND TOTAL        ---------------->	$ 19,180	#11 Divided by # of months

NOTE:  Line #1 above:      # of fixtures  x  # of lamps  x  # of watts per fixture
NOTE:  Lines #4 & #5 above:     Rates increase an average of 5% per year
 

9	ENERGY COST SAVINGS         ---------------------------------------------->	$ 20,163	Present Condition Cost Minus Recommendation
10	AIR CONDITIONING ENERGY SAVINGS    --------------------------->	$  3,357	See Below (HVAC Calculation)
11	TOTAL ENERGY SAVINGS      ---------------------------------------------->	$  23,520	#9 + #10
12	Average Monthly Savings Over   _ 3_ Years    ( __36___ Months)	$   653.00	#11 Divided by # of Months

 

INVESTMENT - PAYBACK - RETURN ON INVESTMENT
13	TOTAL COST OF ENERGY SAVING SYSTEM (200  x  50)	$  10,775	Quantity x Cost
14	PAYBACK	16.5  Months	#13 divided by #12
15	RETURN ON INVESTMENT	73  %	(#12 x #12) Divided by  #13 x 100

 NOTE:  TOTAL COST includes Tax & Installation
 
 
 

From the table below, we will typically use the 12.5 cent figure for Kilowatt Hour (KWH). This is the PG&E average for California and Nevada. For the purposes of this example, with lights on 6 days per week, 10 hours per day at 12.5 cents per KWH, we have used the $ 00.39 cost per KWH. Your figure will vary depending on your usage and KWH cost.

 

The U.S. Federal Energy Administration estimates that for each THREE watts of lighting saved, ONE watt of air conditioning load will be saved. In order to calculate this saving:

MULTIPLY THE ENERGY COST SAVINGS (#9 ABOVE) x .333 x THE NUMBER OF MONTHS AIR CONDITIONING IS OPERATED, DIVIDED BY 12.

$___20,163________ x .333 x ____6_____ DIVIDED BY 12   ==  $3,357
  Energy Cost Saving                  # Months

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Stuart Nussbaum

lighting@gotnet.net