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3/5/2015 Building management case study | NSW Environment & Heritage

http://www.environment.nsw.gov.au/business/financing-building-management.htm 1/4

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Case study 9: Buildingmanagement systemFind out how a property company using on­bill financing to

finance a new building management system determined that

it would be better off by about $64,000 over 15 years.

Situation

A property company owns and operates a mixed use building thatincludes office space and retail space. This building is served by acentral air­conditioning system that is controlled by an out­datedbuilding management system (BMS). This system is over 10 years old,no longer supported by the vendor, and does not provide a sufficientlevel of control to manage and optimise control strategies. It seeks toupgrade it seeks to upgrade its BMS system.

How does the energy­efficient (EE) systemcompare to the standard system?

Equipment type Standard EE

Cost to install ($)  $100,000  $200,000

Operation and maintenance cost($ p.a.)

 $5,000  $5,000

3/5/2015 Building management case study | NSW Environment & Heritage

http://www.environment.nsw.gov.au/business/financing-building-management.htm 2/4

Electricity use (kWh p.a.)  900,000  810,000

Equipment life (years)  10  15

Electricity cost reduction in firstyear from EE ($)

   $18,000

Simple payback period for EE(years)

   15.4

Simple payback period for EE,with marginal capital1 (years)

   7.7

Item  NPV 

Standard system  ­$1,317,043

EE system  ­$1,252,692

Difference  $64,351

Finance option selected: On­bill financing

The company is a customer of Origin Energy and decides to seek on­bill financing to finance its new Building Management System, as thisresults in the highest expected NPV.

3/5/2015 Building management case study | NSW Environment & Heritage

http://www.environment.nsw.gov.au/business/financing-building-management.htm 3/4

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1This is the payback period for the energy­efficient (EE) optionusing the difference in capital outlay between the standard andEE equipment, rather than the full capital outlay for the EEequipment.

Yes

No

Page last updated: 27 February 2015

Case study(PDF180KB)

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