In most cases your Assessor should be able to get the majority of the information they require by just going around the property. The data entered into the software is based on evidence gathered during the visit.

The Assessor must take photographic or obtain documentary evidence which is needed for audit purposes. If no evidence is gathered then the Assessor must enter the term “as built” in to the software. In this situation the software program will use what the property would have been built with based on it’s age.

If you can provide documentary proof of any of these sorts of improvements to the property then these can be shown on the EPC and will probably help the rating of your EPC Certificate.

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

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

• Loft extensions year it was constructed – completion certificate, dated architectural drawings.

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

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

The three items that have the main impact 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 kinds of fuel sources: gas, peak rate electric, off peak electric, oil, bulk or bottled LPG. So for instance a house heated by gas would cost you somewhere in the region of 4.64 pence per kwh and the identical house which is 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 home, it would cost you £556 to heat with gas when compared with £2,760 for bottled LPG.. Therefore running costs affects the Energy Performance rating rating. 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
Although improvements to the double glazing will make a difference, the biggest difference is actually really achieved when you are improving from single glazing to doubled glazing. If you are simply modernising from pre 2002 double glazing, this would only show as a modest increase in the energy rating of the home. With double glazing the perception is normally sensed by the customer in terms of comfort from a decrease in draughts. Because the EPC doesn’t consider the condition of any specific object, this comfort gain is not measured.

 

Low Energy Lights
Again low energy lights does help the Energy Performance Certificate as they are an inexpensive improvement that contributes to lower energy costs but nowhere near the same contribution as heating controls, heating system, and insulation.