Since 2003, we have been helping New Englanders save energy and be more comfortable in their homes.

I was impressed and pleased with your company. Your service was exceptional, honest and on time, and the installation team left the place spotless after working all day.
— Cheryl from Brattleboro, VT

Our Services

Cellulose Insulation – Cellulose is a great insulation material with a high R-value. It’s treated against fire, mold and pests as well as being made from recycled material. We can work in new or existing structures and we’ll help you choose the most cost-effective and non-invasive methods to meet your insulation needs.
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Diagnostic Testing – We have the tools and expertise to identify problems in your home or building. We use a blower door test and infrared camera to find where you’re losing your energy dollars. During the inspection, we also check for moisture and basic structural integrity to make the best choices for you and your building’s overall health. Learn more.

Efficiency Vermont Rebates – Efficiency Vermont provides a wealth of resources for property owners to improve energy efficiency and comfort. Farnum Insulators works with our customers to help them get the best rebates and financing in Vermont.
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Indow® Interior Window Inserts – We are a certified Indow® Window dealer. These are interior windows that are nearly invisible, require no hardware, do not damage the window frames or trim, and double your windows’ energy efficiency.
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Spray Foam Insulation – Sometimes cellulose isn’t the best option. Damp basements, rim boards and some wall cavities are best insulated using this amazing spray-on foam. With high R-value, an ability to expand into a space and airtightness, we’ll advise you on which insulation is best for you.
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Financing – We offer 12 Months Same-As-Cash financing through Enerbank as well as a variety of longer term loans with excellent rates through Efficiency Vermont's Heat Saver Loan program. For more information see our handout.

  • To apply for the Enerbank 12 Months Same-As-Cash loan call toll free 866-644-3659. Use contractor ID # 802 387 and promotional code # MJC987

  • You can apply on-line for an Efficiency Vermont Heat Saver Loan at


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