PAS0042 14 Cambridge Road

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Retrofit plans

Carbon cost effectiveness assessment

This section looks at the measures in your proposed improvement plan and calculates the carbon cost effectiveness of each option, basically how much it costs to save a tonne of carbon. I have taken the figures from the previous page and added in the possible lifetime of the product based on guarantees offered. This lifetime figure is multiplied by the yearly CO2 saving to give a lifetime CO2 saving. The lifetime CO2 saving is then divided by the cost of the measure to give the cost per tonne of carbon saved.

Costs of installation are estimated, they are included to help you understand relative costs of different measures. These costs based on industry rates for similar work, these can become out of date quite quickly particularly with the challenging market conditions of the last few years. These are not competitive quotations actual costs may be higher or lower, they do not include any grants or incentives that you may be eligible for.

The figures can be updated with further details as the project gets further down the line and you get actual quotes for the work. The lifetime figure is an estimate based on the guarantees offered by installers, insulation may last a lot longer in reality. Ventilation is excluded from the calculation unless you opt for an MVHR system.

Phase 1 measures

Phase 1 measures

Phase 1 Measures

Estimated Costs

Energy Rating

Fuel Bill

tCO2

Carbon Saving

Lifetime

Lifetime CO2 savings

Carbon cost effectiveness

Where you are now

Per Measure

70 C

£800.00

3.72

Phase 1 Measures

External insulation to 1900-1929 solid walls

£9,320.00

74 C

£700.00

3.14

0.58

14.50

£643

Humidity controlled kitchen extractor

£500.00

74 C

£700.00

3.14

Humidity controlled passive ventilation to non-wet rooms

£420.00

74 C

£700.00

3.14

Humidity controlled extractors per wetroom

£500.00

74 C

£700.00

3.14

After Phase 1 Measures

74 C

£700.00

3.14

Package Cost & % Improvements

£10,740.00

13%

16%

0.58

14.50

£741

There are no rows in this table

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Phase 2 Measures

Phase 2 Measures

Phase 2 Measures

Estimated Costs

Energy Rating

Fuel Bill

tCO2

Carbon saving

Lifetime of measure

Lifetime C02 savings

Carbon cost effectiveness

After Phase 1

Per Measure

74 C

£700.00

3.14

Full multi zone controls (TRVs and programmer) from single programmer and room thermostat

£700.00

76 C

£640.00

2.80

0.34

4.76

£147.06

300mm loft insulation from unknown insulation - no access to loft

£850.00

78 C

£590.00

2.50

0.3

7.50

£113.33

Insulated floors (50mm) from 1900-1929 suspended timber floor

£6,380.00

79 C

£570.00

2.38

0.12

3.00

£2,126.67

A++ triple glazed casement windows from double glazing of unknown age

£25,800.00

81 B

£520.00

2.05

0.33

8.25

£3,127.27

After Phase 2 Measures

81 B

£520.00

2.05

Package Cost & % Improvements

£33,730.00

26%

35%

1.09

23.98

£1,406.59

Cumulative Cost & % Improvements

£44,470.00

35%

45%

There are no rows in this table

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Phase 3 Measures

Phase 3 Measures

Phase 3 Measures

Estimated Costs

Energy Rating

Fuel Bill

tCO2

Carbon saving

Lifetime of measure

Lifetime CO2 savings

Carbon cost effectiveness

After Phase 2

Per Measure

81 B

£520.00

2.05

Install PV system where potential has been identified

£5,670.00

92 A

£160.00

1.42

0.63

15.75

£360

After Phase 3 Measures

92 A

£160.00

1.42

Package Cost & % Improvements

£5,670.00

69%

31%

Cumulative Cost & % Improvements

£50,140.00

80%

62%

2.3

55.20

£908

There are no rows in this table

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