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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
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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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