On a basic level, there are a few simple indicators to suggest a house is energy efficient.
The vast majority of energy-efficient homes feature a well made and tightly sealed thermal envelope, in addition to quality heating and cooling systems and controlled ventilation.
Furthermore, the presence of well manufactured, energy efficient doors and double glazed windows can also be expected within energy efficient properties.
For further information, tips and advice surrounding household energy efficiency, take a look at our dedicated blog, How Can I Make My Home More Energy Efficient?