***************************************
Tories alerted over unreliable energy ratings
Wednesday 18th November 2009
Doubt has been cast on Energy Performance Certificates after its software was rewritten to give improved results.
In one case, says a Domestic Energy Assessor, an EPC carried out on a property in 2007 produced an RdSAP rating of 65 and in Band D.
But a newer EPC carried out on exactly the same unaltered property upped it to an RdSAP rating of 75 and in Band C.
Paul Walker, of the Institute of Energy Assessors (IDEA), said the second rating is more accurate.
But he said it also means that EPCs which are more than a year old are unreliable.
Walker explained that the older software, approved by the Government, meant the use of many inbuilt default values and assumptions.
In September 2008, the software was updated, changing some of the defaults and allowing inspectors to input what was actually there.
A further software update last month means that a set of radiator controls which had previously been given an average score would now achieve a good one. Another update is due in October next year.
Walker points out that the EPC also has a table showing costs of heating and lighting, and savings that could be made by carrying out improvements.
Fuel prices are built into the software and updated every six months. “Again,” says Walker, “this means that an EPC a year or more old is out of date.”
The growing discrepancies mean that two identical properties, side by side, will have different ratings, depending on when the EPCs were done.
It also means that the 'Big Brother' national database of EPCs is, inevitably, inaccurate.
On behalf of IDEA, Walker has now written to shadow housing minister Grant Shapps, challenging him over the Tories’ intention to allow EPCs to be up to ten years old when properties are put up for sale. At the moment an EPC can be no more than three years old.
Walker said: “The EPC is the best way to inform the public on how to help reduce CO2 and their fuel costs. The EPC will improve and evolve, but at the moment an EPC that is over a year old cannot be relied upon to give a true picture of a property.”
Estate Agent Today
*********************************************