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Health Checks for Existing Commercial Buildings

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Cost

Carbon

Energy

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New buildings comprise just 1-2% of our total building stock*

Existing buildings make up majority of commercial building stock

Significant CO2 reductions need to come from existing commercial buildings if Government CO2 reduction targets are to be achieved

Existing Commercial

Buildings

*Investment Property Forum Research Program 2006 - 2009

www.hoarelea.comEach building has unique opportunities for improvement.

Good Examples Bad and Ugly

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Where we are Where Government would like us to be

The compromise

How do we get from the Range Rover to the Prius?How much can we reasonably expect to save?

What should we do next?

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Appraisal Evaluate Implement & Monitor

Carbon Management

Strategy

EmissionsManagement

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EmissionsManagement

Aim: Continual Improvement

Process

1

2

3

Metering Compliance and coverage Metering and Data Scope & Accuracy Recommendation Report

Energy Performance v Best Practice Engineering Systems Health Check Improvement Identification

Implement Improvements Validation of Improvements Measure Success

CARB

ON M

ANAG

EMEN

T

Appraisal

Evaluate

Implement & Monitor

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Appraisal

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The Building

Health Check Metering and Measurement Audit

Energy Use

Energy Data Collated

and Used for:

Tenant Invoicing&

CRC

Missing Link

Appraisal

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Health Check - Metering and Measurement Audit

Offices 1st to 6th floors

Reception and Retail Ground Floor

Hoare Lea were appointed to investigate why the landlord’s areas (15% of the building) were responsible for 65% of the building electricity consumption.

Building Total Area 1,500m2

Appraisal

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We undertook a metering “Health Check” Results: Metering scope, strategy, coverage and accuracy was correct

Appraisal

Health Check - Metering and Measurement Audit

We undertook building performance analysis – Results: Performance as “Typical” for each category of use (Office and Retail)

198

128

226.0

0

50

100

150

200

250

Actual (Office) Good Practice Office Guide F

Typical OfficeGuide F

Annu

al k

Wh

per

m²

Office Area Energy Use (Electricity)

230

172

231.0

0

50

100

150

200

250

Actual (Retail Unit) Good Practice Retail Guide F

Typical Retail Guide F

Retail Unit Energy Use (Electricity)

Annu

al k

Wh

per

m²

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Appraisal Data Health Check - Metering and Measurement Audit

The Building

Energy Use

Energy Data Collated

and Used for:

Tenant Invoicing

&CRC

Missing Link

£37,815.00

£9,549.00

£28,266.00

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Appraisal Data Health Check - Metering and Measurement Audit

The Building

Energy Use

Energy Data Collated

and Used for:

Tenant Invoicing &

CRC£37,815.00

Someone was out of pocket by £28,200.00 each year!

£37,815.00

Missing Link

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Evaluate

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Evaluate

Hoare Lea was appointed to evaluate engineering systems and undertake a health check for a large London portfolio with large energy demands.

Electricity 13,122,736 kWh

Cooling 2,522,930 kWh

Heating 3,171,310 kWh

2,000,000

4,000,000

6,000,000

8,000,000

10,000,000

12,000,000

14,000,000

Annual Energy Demands (2009-2010)

kWh

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The primary heating pumps were operating 24/7 365 days per year

Evaluate

0

50,000

100,000

150,000

200,000

250,000

300,000

kWh

West Building Heating Profiles

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Why were the pumps operating continuously?

To serve a 300l calorifier!

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0

50,000

100,000

150,000

200,000

250,000

300,000

kWh

West Building Heating ProfilesSolution:Install a gas fired stand alone DHW calorifier.

Payback 1 year.

Yearly Savings:£11,152.00, 247,820kWh, 47,581kgCO2

Evaluate

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AHU’s operating 24/7, 365 days per year

Evaluate

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AHU’s operating 24/7, 365 days per year

Evaluate Annual Cost to Operate the AHU Fan:

Evaluate

AHU 5 Supply Fan Only£0.11 p/kWh1,053 kWh/week54,756 kWh/Year£115.83

Week running cost 24hrs/day

£6,023.16

Yearly Running Cost

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Why, was this AHU operating continuously?

To serve the night receptionist!Solution:Provide a portable heater for use when necessaryPayback instant

Use these savings to fund further improvement works

Evaluate

Savings£3,011.58 £

27,378.00 Savings electricity kWh

15,057.90 Saving kgCO2

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Implement & Monitor

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Implement & Monitor

Use the savings to identified during “appraisals and evaluations “ to fund further improvement works that require more intensive capital investment.

Develop a strategy and plan

Continual monitoring of performance is imperative

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