Can you afford not to ? ? 
Many banks are sympathetic to energy efficient upgrades.

There is other funding available including:

• up to $30,500 to install PV Solar Panels
• up to $4,500  for weatherization
• up to $1,000 for a new boiler
• up to $600 for a heat pump
• $ for hot water heater, lights, windows etc.

For further investigation follow these links:

Massachusetts Technology Collaborative

Database of State Incentives for Renewables and Efficiency

www.thinksmartthinkgreen.com

Green Affordable Housing Initiativeg