People in rented accommodation may find it difficult to get cheap energy bills due to a lack of efficiency measures.
This is according to figures from E.ON, which estimated people living in these dwellings could be missing out on savings of up to £400 per year.
It suggested there is a great deal of confusion between tenants and landlords about who is responsible for improving the energy performance of a property.
Nearly half of renters believe this should fall on the landlord, though two-thirds think the property owner would not agree to make changes.
Chief executive of the National Landlord's Association Richard Lambert said: "It's important that tenants and landlords both realise that there are ways of improving the energy efficiency of properties."
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