Governments and utilities offer rebate programs for energy conversions and energy efficiency.
National Grid Rebates
National Grid offers a number of rebate programs for businesses and residences.
https://www1.nationalgridus.com/EnergyEfficiencyPrograms-NYM-RES?ng=us
National Grid Advanced Conversion Rebate application
Get Enhanced Conversion Rebates when you convert your home to natural gas heating.
https://www1.nationalgridus.com/files/AddedPDF/POA/UNY_ECR_Forms_V5.pdf
Federal Income Tax Credits for Energy Efficiency
Federal tax credits are available for residential energy efficiency in existing homes and new construction.
http://www.energystar.gov/about/federal_tax_credits
More incentive programs may be found at DSIRE
DSIRE is a comprehensive source of information on incentives and policies that support renewable energy and energy efficiency in New York and the United States
http://programs.dsireusa.org/system/program?state=NY