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

What we want to prevent is the Assessor putting into the software program the phrase “as built” for items which are required where no proof is obtained. When 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 impact on the {rating of the EPC}

Whenever you can provide documentary proof of these kinds of improvements to the property then this can be shown on the Certificate and will likely increase the rating of your EPC.

• Any wall insulation Internal/Cavity/External– {guarantee, or receipt from installer.}

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

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

• Roof conversions year it was built – building control sign off, dated architectural drawings.

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

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

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

Main Source of Fuel
UK properties 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 property or home heated by gas would cost around 4.64 pence per kwh and the same property or home which is heated by bottled LPG 23p per kwh. {*source 2019 Nottingham Energy Partnership.} So using a typically semi which uses in the region of 12,000 kwh to heat the property, it would cost £696 to heat with gas as compared to £2,760 for bottled LPG.. Therefore running costs influences the EPC score. Higher expenses equals lower ratings.

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 upgrades to the double glazing can make a difference, the biggest difference is only really achieved when upgrading from single glazing to doubled glazing. If you are simply modernising from pre 2002 upvc double glazing, it will only show as a small increase in the energy rating of the property. With upvc double glazing the perception is typically felt by the customer in terms of cosiness from a decrease in draughts. Since the EPC doesn’t consider the condition of any particular object, this comfort gain is just not measured.

 

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