The aim of this study is to identify the factors affecting behavioural intention in buying energy-efficient household products in Malaysia. The extended Theory of Planned Behaviour (TPB) was tested in this research. Five hypotheses were tested using data derived from 336 residences in Malaysia. The hypothesized model incorporates knowledge and reasonable price into the conventional (TPB) model. Multiple regression analysis was used to examine the relationship between the independent and dependent variables. The results of the multiple regression analysis show that attitude, subjective norm, perceived behavioural control, knowledge and reasonable price have significant and positive effect on energy-efficient household product buying intention among residences in Malaysia. This research results provide insights for companies for promotion of green technological products and in strategizing to motivate residence in Malaysia to embrace green consumption behaviour. © 2019 Syed S. Alam et al., published by Sciendo.