Energy suppliers British Gas have been found to charge up to 75 per cent more than other companies to install a boiler, it has emerged.
Homeowners who install cheap energy solar panels can increase their property's value by up to five per cent of its total worth, an expert has claimed.
Environmental campaigners Greenpeace have called on the government to work with the business community to develop cheap energy initiatives.
An industry expert has said that an increasing number of firms are now becoming more conscious of their business energy efficiency.