The UK's Carbon Trust says it is widening the access for small to medium-sized businesses to have access to £100m in interest-free loans to boost energy efficiency measures.
The minimum loan amount has been reduced to £3,000, while the upper limit has been doubled to £400,000, the group said.
"Our 0% loan offer is as close to free money as a business can get, and is flexible enough to help almost any small or medium business, from the corner fish and chip shop to a factory," said Carbon Trust chief executive, Tom Delay.
Smaller loans could cover a new energy-efficient boiler, refrigeration unit, lighting or cooking equipment, especially for businesses like retailers and caterers.
Large loans would be able to cover the complete modernisation of manufacturing equipment and premises.
The Carbon Trust was set up to accelerate the move to a low-carbon economy and also develop commercial low-carbon technologies for the future.