10-Year Energy Guarantee Program

Energy Guarantee Program Highlights

Nu-Wool Premium Cellulose Insulation is so energy efficient, Nu-Wool Co., Inc. guarantees the heating and cooling bills on new homes built with Nu-Wool Premium Cellulose Insulation. Nu-Wool Co., Inc. has been offering guarantees on the energy performance of homes for over 25 years. We can offer this guarantee because Nu-Wool Premium Cellulose Insulation performs so consistently.  We know of no other insulation manufacturer that offers a similar guarantee without any additional charge. 

If Nu-Wool stands behind its products so strongly, why don’t other insulation manufacturers?

< 1 %

Homes Reimbursed

Out of 1000s of customers

How Does the Guarantee Work?

  1. A certified Nu-Wool WALLSEAL dealer installs Nu-Wool Premium Cellulose Insulation into your new house.
  2. Key characteristics are entered into a computer program that calculates heating loads and the cost of heating based on fuel, weather data, efficiency of the heating system, and the air infiltration factor for the specific house at no additional cost to the homeowner or builder.
  3. You will receive your guaranteed amount that outlines your estimated yearly heating and cooling bill.
  4. At the end of the year, compare your actual energy bills to our estimate. If you paid more than our estimate, Nu-Wool Co., Inc. will reimburse the homeowner 50% of the overage. Simply contact Technical Services by emailing rdevries@nuwool.com.

Under this program, the heating and/or cooling bills are guaranteed for a period of ten years.  Plus, the guarantee is transferable if the home is sold.  

The computations used for the guaranteed amount reflect real world insulation effectiveness. If only R-Values were used in the computations, homes with Nu-Wool Premium Cellulose Insulation would not heat or cool any differently than homes with fiberglass insulation. However, because it reduces air infiltration, Nu-Wool Premium Cellulose Insulation has a higher “Effective R-Value.” As a result, Nu-Wool insulated houses heat and cool more efficiently.

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Have Nu-Wool Installed

Nu-Wool Insulation products are available for professional install by a certified installer or can be purchased at select lumberyards and retailers for DIY install.

Energy Savings Calculator


The use of this calculator is limited to comparisons between energy costs of example homes only. The numbers shown do not represent actual dollar amounts or dollar savings from Nu-Wool Co., Inc. Your savings may vary. The calculations are based on typical new home construction, state average utility costs, new high efficiency HVAC systems, and typical weather for the state selected. These numbers do not include base utility costs such as water heating, lights, and appliances. If you have questions, please contact the Nu-Wool technical department at (616) 669-0100.