Summary

This section is a summary of the key findings from the site. 

As of Feb 2013 the emphasis has been on the analysis of heating energy (central heating, cooking, hot water) which is all provided by natural gas. The reason for prioritising heating over electricity is because it has the highest personal value in terms of comfort. It is also more challenging than electricity to control. Whereas it is quite easy to identify where electricity is being consumed, it is much more difficult with heat energy as many thermodynamic processes are involved.

Overall Energy Consumption

The first information to be presented has been obtained from EON's Energy Tracker facility and is provided as part of the on-line account. 

This is an excellent facility for viewing the results of efforts made to save energy and money. The graph is shown below where the black line is 2010 and the columns 2011.

As can be seen savings have been made but only by making simple efforts to be more energy aware. That is, no significant insulation, heating or electrical upgrades were made during the majority of the period. 

From September minor work did start as part of decoration to ensure that there was no unwanted external ventilation causing draughts and heat loss. This consisted of filling gaps around doors or windows with decorators filler etc.


Fuel Consumption and Fuel Cost Summary

In order to save energy it is important to know how it is being used. The table below detail the consumption obtained from the utility bills.

Fuel

Approximate cost per Unit

(p)

Fuel Cost for Year

£

Electricity

10

444

Gas

3

489


The prices above are for an on-line tariff and the costs include the discounts applied to the quoted costs per unit. 

For comparison, at another property, the effective unit prices for another supplier, were gas  5.7p and electricity 14.6p. The low consumption had inflated the price since the first units are significantly more expensive. However, it highlights the differences that can be experienced.

Key Points

The spend on the two energy types was virtually identical for the year.
Electricity is more than three times the cost of gas.

Conclusion

If a choice exists between the two fuels consider using gas rather than electricity. e.g. hot water heating. However, the efficiency with which the fuel is used must be considered. e.g. boiling a kettle on the cooker is unlikely to be more efficient than using an electric kettle.

Fuel Usage and Fuel Cost Breakdown

Fuel Usage
Annual Cost
(£)
Gas Central Heating 273
Hot Water & Cooking 216
Electricity Lights TBA
Other TBA

Financial Value of Insulation

Here is a summary of the calculated heat loss and energy costs from the house. 

The column "Heat Loss with Insulation" is the estimated heat loss for the house as currently insulated.

The column "Heat Loss without Insulation" is the estimated heat loss as would have been when the house was first built. This estimate has been carried out to illustrate the effectiveness of the insulation.

Heat Loss without insulation.

(W/K)

Approximate Annual Cost.

(£)

Heat Loss with Insulation.

(W/K)

Approximate annual cost.

(£)

Annual Saving.

(£)

Roof 297 (45%) 395 10 (5%) 14 381
Walls 177 (27%) 237 69 (34%) 93 144
Doors and Windows 133 (20%) 176 86 (42%) 115 61
Floor 52 (8%) 70 40 (20%) 55 15
659 878 205 273 601

  • The maximum saving is by loft insulation.
  • The next biggest saving is wall insulation.
  • The overall saving by all the insulation is a massive £601 per year.