Insulation & Windows

Stay warmer in the winter and cooler in the summer with weatherization incentives.
A family in Massachusetts

Insulation, air sealing, and window upgrades work hand in hand to make your home more energy efficient and comfortable. Weatherization upgrades are the most cost-effective way to save energy.

The Sponsors of Mass Save also offer no-cost insulation and air-sealing upgrades to income-eligible residents.

A person configuring an integrated control thermostat

​​​Not Sure Where to Start?

Start your home energy efficiency journey with a no-cost virtual or in-person home energy assessment. An Energy Specialist will seek out inefficiencies, recommend upgrades, and help you access available rebates and incentives.

Shelbourne Case Study Image

Case Study: Shelburne Falls Addition

To make a new addition more comfortable, Angel and her husband took advantage of incentives to increase the insulation levels, install a high-efficiency mini-split heat pump, add a new fan vent, and make LED lighting upgrades.

An energy efficient home in Westhampton Massachusetts

Case Study: Westhampton Upgrades

Homeowners in Westhampton participated in a no-cost energy assessment to find ways to make their home more comfortable. By making insulation improvements and installing LED lightbulbs and advanced power strips, the homeowners are expected to save $486 annually in energy costs.