From the National Resources Canada website.

ecoENERGY Retrofit Grants and Incentives

Natural Resources Canada's (NRCan's) ecoENERGY Retrofit program provides financial support to homeowners, small and medium-sized businesses, industrial facilities and public institutions to help them implement energy saving projects that reduce energy-related greenhouse gases (GHGs) and air pollution, thereby contributing to a cleaner environment for all Canadians.

For Homeowners

ecoENERGY Retrofit – Homes is available to owners of single family homes including detached, semi-detached and low rise multi-unit residential buildings.

Property owners can qualify for federal grants by improving the energy efficiency of their homes, and reducing their home's impact on the environment.

The maximum grant one can receive per home or multi-unit residential building is $5,000; whereas the total grant amount available to one individual or entity for eligible properties over the life of the program is $500,000.

For Small and Medium-Sized Organizations

ecoEnergy Retrofit program provides a financial incentive of up to 25% of project costs to a maximum of $50,000 to help small and medium-sized commercial and institutional buildings and industrial facilities implement energy saving projects.

Incentive Program Websites

National Resources Canada - ecoENERGY Retrofit Grants and Incentives

Natural Resources Canada: Retrofit Your Home and Qualify for a Grant