Energy Performance Certificates for Commercial & Domestic Buildings

Assess Ltd

Tel        0121 453 8332

Mob     07771 662 357

Email   [email protected]

In order to help reduce the UK’s carbon emissions the UK Government have introduced the RENEWABLE HEAT INCENTIVE SCHEME which guarantees you a quarterly payment for a period of seven years if you install a more energy efficient, low carbon, renewable heating system into your home or business.


The Renewable Heat Incentive (RHI) is a government financial incentive to promote the use of 'renewable' heating. Switching to heating systems that use renewable energy sources can help the UK reduce its carbon emissions and meet its renewable energy targets.


People who join the RHI scheme receive quarterly payments for seven years for the amount of clean, green renewable heat it’s estimated their system produces. How much the system uses (therefore the amount of the payments) is normally determined by an EPC (Energy Performance Certificate).


An EPC provides an energy efficiency rating for a property and make recommendations on how to reduce energy and save money, it's a legal requirement every time you buy, sell to rent a property in the UK and is a requirement to join the Governments RHI Scheme.


Your EPC must be less than 24 moths old at the date of application





For the purposes of the scheme this primarily means a system based upon a ‘heat-pump’ which takes energy (heat) from the ground (ground-source) or from the air (air-source) and uses it to heat your property. The RHI scheme also recognises hot water produced from 'solar thermal' which provides you with hot water heated directly from sunlight.


Ground Source & Air Source Heat Pumps are not new technologies they have been around for many years so are tried and tested and have come to be referred to as ‘fit and forget’ technologies because once installed that tend to run efficiently for many years with very few issues or problems. They are highly efficiency because although using a small amount of electricity to power themselves the primary heat that they provide to the building is taken from the ground or air (or directly from the sun in the case of solar thermal).


The only reason that these are not the standard type of system that you find in every property up and down the country is that they can be a little more expensive to install and this is what the Governments RHI Scheme is intended to address.


The RHI Scheme makes it possible for any and all properties within the UK to install a highly efficient, renewable heat-pump and/or solar-thermal system without bearing the extra costs involved in the installation.





The value of your RHI payments are directly linked to the information on your EPC so it is critical to get this right, our ‘Enhanced EPC Survey’ involves a site visit to collect the normal information required to produce an EPC for the property PLUS additional information that we collect to optimise the type, model and layout of the renewable heating system that will be proposed. It will help with the initial layout, size and suitability of the system and determine if any existing plant might be utilised in order to keep costs to a minimum.


Our enhanced EPC survey would normally involve several hours on site and require access to the whole property, grounds and services to the property, it may also involve a degree of more detailed investigation (discussion) into your specific requirements from the system and use of the spaces within it.


Following our survey we will produce a site report and draft EPC for the property as it will be AFTER the system is installed which gives very accurate initial information upon which the optimal system can be proposed (quoted) including a very accurate estimate of the likely RHI payments involved.


(many installers simply ‘guess’ at the likely RHI payments or base them on the property as it is BEFORE work commences … typically this leads to quite ‘misleading’ figures being floated about which often just never materialise leaving you with an overly expensive investment)    


Our Enhanced EPC survey ensure that you receive a proposal for an effective and highly efficient renewable heating system based upon a very accurate estimate of the payments you will receive by participating in the Governments RHI Scheme.





There are two types of EPC available for domestic properties ...

Reduced SAP (RdSAP) EPC's  and Full SAP (SAP) EPC's.


RdSAP EPC's are produced from a site visit and use a lot of 'assumptions' based on the build date of the dwelling.


SAP EPC's are produced when a dwelling is first built or converted and also for extensions containing a large amount of glazing. They are produced from drawings and specifications provided and can be far more accurate than RdSAP EPC's. 


If you are applying to join the RHI Scheme for a dwelling which is new, converted or is being extended you may be required to provide a SAP EPC rather than an RdSAP EPC.


SAP EPC's are different from normal domestic EPC's in that the energy assessor will also check compliance with the Building Regulations Part L and provide SAP Calculations, U-value and Part L Compliance Reports in addition to the SAP EPC. It is normal to conduct a SAP Assessment at both the Design Stage and As Build Stage of the project to ensure compliance will be achieved.

RHI - Renewable Heat Incentive Scheme

EPC Solar 3C



A new generation of hot water cylinders from SOLAR3C with mulitple heat exchenge coils that not only allow you to store energy generated from mulitple sources but use this (otherwise wasted) energy as low-level 'background' heating for your home.


Conventional cylinders are limited to single or double heat exchange options but Solar 3C Cylinders give you an additional option which might be used to feed excess energy back into you heating circuit thus making use of otherwise wasted, excess energy and adding to the overall comfort of your home.



Solar 3C Cylinders GSHP Coil - RHI Air Source Heat Pump - RHI Sol Thermal - RHI



Collect energy directly form sunlight to provide you with 'free' domestic hot water.

Although a small amount of electricity is required to pump the hot water to your storage tank the real 'heating' is done by the sun.


Encorporating a Solar 3C Hot Water Cylinder allows excess hot water to be used to provide low-level background heating to your home.



Heat pumps are not new they have been around for many years and can provide heating and hot water very efficiently by taking energy from the surounding ground or air.



Take energy / heat from the ground via a horizontal 'array' from vertical 'bore holes' drilled hundres of meters into the earth.



Take energy / heat from the surrounding air even at very low temperatures (-30 c) they are already widely used in commercail building.

Heat Pump System