The National Landlords Association (NLA) has said few property seekers seem to be requesting Energy Performance Certificates (EPCs) to help them pursue cheap energy rates.
Since the autumn of last year, many private landlords have been required to provide an EPC to give prospective tenants a better idea of how high energy bills are likely to be, but the NLA says landlord feedback suggests few tenants are concerned enough to even ask.
Properties in the UK have an average efficiency rating of D - approaching the lower end of the chart - and with energy-saving technology not widespread EPCs could have less of an impact on decisions made by property seekers to put in an offer on a home or flat.
Sussanne Chambers, a director of the NLA, said: "What has become apparent is that tenants don't seem to be interested in them, or use them as a deciding factor in choosing a rental property."
Jon Evans, managing director of Hips.co.uk, has argued that EPCs should be promoted more effectively as pursuing energy-efficiency can benefit both landlord and tenant.
The government has advised that domestic insulation is one of the best ways to reduce bills from energy suppliers.
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