The data entered into the software program is based on proof that the Assessor gathers during the visit. Typically the Assessor will get almost all of the information whilst going around the property.

What we need to avoid is the Assessor putting into the software program the phrase “as built” for items that are needed where no evidence is obtained. If the term “as built” has to be used then the software will default to the worst case scenario based on what would have been there when the property was built. EPC score.

If you can supply documentary proof of these types of improvements to the property then this can be shown on the EPC and will probably enhance the rating of your EPC.

• Loft extensions year it was built – completion certificate, dated architectural plans.

• Double glazing improvements to the majority of the property – Fensa certificate, or dated receipt from the installer.

• Any wall insulation External/Cavity/Internal– Any guarantees, or invoice from the contractor

• Solar PV or Solar Thermal – An MCS certificate from contractor.

• Sloping ceiling insulation/ floor insulation – receipt from contractors showing thickness installed.

The three things that have the most significant effect on the energy rating are:

• The heating system.
• The main source of fuel for heating the property
• The levels of insulation in the property.

Main Source of Fuel
UK properties are typically heated by either of these fuel sources: gas, peak rate electric, off peak electric, oil, bulk or bottled LPG. So for instance a property or home heated by gas would cost around 4.64 pence per kwh and the same property or home heated by bottled LPG 23p per kwh. {*source 2019 Nottingham Energy Partnership.} So using a typically semi using around 12,000 kwh to heat the property, it would cost £696 to heat by gas in comparison to £2,760 for bottled LPG.. Therefore running costs influences the Energy Performance rating score. Higher expenses equates to lower scores.

Levels Of Insulation
Good levels of insulation ensures that the demand on the heating system is kept down, and it also results in a more comfortable home with lower running costs.

The Heating System
An efficient heating system with good controls such as room thermostat, thermostatic valves and programmer helps to keep energy bills down. This all contributes to a better rating on the EPC.

Double glazing
This particular one may come as a bit of a shock, but double glazing does not have as big an effect on the EPC as most people would assume. Certainly not nearly as much as the heating, the insulation and the type of fuel used as earlier mentioned. However, where it does have a greater impact, is if the home is upgraded from single glazing to double glazing. When you are changing from pre 2002 double glazing, to current double glazing, this will only show as a small rise in the energy rating of the home.

With double glazing the perception is generally noticed by the customer in terms of comfort from a decrease in draughts. Because the EPC doesn’t consider the condition of any particular item, this comfort gain is not measured.

 

Low Energy Lights
Again low energy lights does indeed help the EPC since they are a low cost improvement that makes a contribution to cheaper energy costs but nowhere near the same contribution as insulation, heating and heating controls.