Officials say people can receive up to £9,000 to help with installation costs for new heating.
Nottingham City Council says it aims to support 420 homes over the next two-and-a-half years.
Installing solar panels and a ground source heat pump will save Delapre Abbey £13,000 a year.
The university's vice-chancellor says it is "constantly ready to adopt new ways of doings things".
The co-operative provide and fit free door curtains, draught excluders, LED bulbs and more to homes.
Improvements to Wellington Civic and Leisure Centre include insulation and an air source heat pump for energy efficiency.
Highland Council has identified potential locations where buildings could be connected to new systems.
Wolverhampton City Council says a £545k grant will help it form a plan to implement across the city.
Charities and energy providers have criticised plans to change the way standing charges on gas and electricity bills are paid.
