The data entered into the software program is based on proof which the Assessor collects during the visit. Typically the Assessor can get most of the information whilst going around the home.

What we want to prevent is the Assessor putting into the software the phrase “as built” for items that will be required where no information is gathered. If the term “as built” must be used then the program will default to the worst case scenario based upon what would have been there when the property was built. This may have a negative effect on the {rating of the EPC}

Whenever you can provide documentary evidence of these types of improvements then this can be shown on the EPC and will likely increase the rating of your EPC.

• Any type of wall insulation External/Cavity/Internal– Any guarantees, or receipts from the installer

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

• Sloping ceiling insulation/ floor insulation – receipt from installers showing thickness fitted.

• Loft extensions year it was built – building control sign off, dated architectural drawings.

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

The three items that have the main 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 homes are generally heated by either of these kinds of fuel sources: gas, peak rate electric, off peak electric, oil, bulk or bottled LPG. So for instance a home heated by gas would cost you around 4.64 pence per kwh and the similar home heated by bottled LPG 23p per kwh. {*source 2019 Nottingham Energy Partnership.} So with a typically semi-detached which uses around 12,000 kwh to heat the home, it would cost you £556 to heat with gas when compared with £2,760 for bottled LPG.. Therefore running costs impacts the EPC rating. Higher expenses equals 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
Although improvements to the double glazing will make a difference, the most significant increase is actually really achieved if you are upgrading from single glazing to doubled glazing. If you are simply upgrading from pre 2002 upvc double glazing, this would only show as a small improvement in the energy rating of the property. With upvc double glazing the perception is normally felt by the customer in terms of cosiness from a reduction in draughts. Because the EPC doesn’t consider the condition of any particular object, this kind of comfort gain is simply not measured.

 

Low Energy Lights
Again low energy lighting does help the EPC because they are an inexpensive improvement that contributes to cheaper energy costs but nowhere near the same contribution as heating controls, heating system, and insulation.