The data put into the software is based on evidence that the Assessor collects 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 which are required where no evidence is obtained. When the term “as built” needs to be used then the software program will default to the worst case scenario based upon what would have been there when the property was built. This could have a negative effect on the {rating of the EPC}

If you can supply documentary evidence of any of these sorts of improvements then these can be shown on the Certificate and will probably improve the rating of your EPC Certificate.

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

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

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

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

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

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

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

Main Source of Fuel
UK homes are typically heated by either of these kinds of fuel sources: gas, peak rate electric, off peak electric, oil, bulk or bottled LPG. So for example a house heated by gas would cost around 4.64 pence per kwh and the identical house heated by bottled LPG 23p per kwh. {*source 2019 Nottingham Energy Partnership.} So with a typically semi using in the region of 12,000 kwh to heat the property, it would cost £696 to heat by gas when compared to £2,760 for bottled LPG.. Therefore running costs influences the Energy Performance rating 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 upgrades to the double glazing does make a difference, the most significant increase is only really achieved when upgrading from single glazed to doubled glazed. If you are modernising from pre 2002 upvc double glazing, this would only show as a modest increase 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 decrease in draughts. As the EPC doesn’t consider the condition of any specific item, this kind of comfort gain is not measured.

 

Low Energy Lights
Again low energy lighting does help the Energy Performance Certificate as they are an affordable improvement that makes a contribution to reduced energy costs but nowhere near the same contribution as heating, insulation, and heating controls.